Commit Graph

540 Commits

Author SHA1 Message Date
Michael Bestas
10ae1daee6 Merge tag 'ASB-2024-09-05_4.19-stable' of https://android.googlesource.com/kernel/common into android13-4.19-kona
https://source.android.com/docs/security/bulletin/2024-09-01
CVE-2024-36972

* tag 'ASB-2024-09-05_4.19-stable' of https://android.googlesource.com/kernel/common: (331 commits)
  Linux 4.19.321
  drm/fb-helper: set x/yres_virtual in drm_fb_helper_check_var
  ipc: remove memcg accounting for sops objects in do_semtimedop()
  scsi: aacraid: Fix double-free on probe failure
  usb: core: sysfs: Unmerge @usb3_hardware_lpm_attr_group in remove_power_attributes()
  usb: dwc3: st: fix probed platform device ref count on probe error path
  usb: dwc3: core: Prevent USB core invalid event buffer address access
  usb: dwc3: omap: add missing depopulate in probe error path
  USB: serial: option: add MeiG Smart SRM825L
  cdc-acm: Add DISABLE_ECHO quirk for GE HealthCare UI Controller
  net: busy-poll: use ktime_get_ns() instead of local_clock()
  gtp: fix a potential NULL pointer dereference
  soundwire: stream: fix programming slave ports for non-continous port maps
  net: prevent mss overflow in skb_segment()
  ida: Fix crash in ida_free when the bitmap is empty
  net:rds: Fix possible deadlock in rds_message_put
  fbmem: Check virtual screen sizes in fb_set_var()
  fbcon: Prevent that screen size is smaller than font size
  memcg: enable accounting of ipc resources
  cgroup/cpuset: Prevent UAF in proc_cpuset_show()
  ...

 Conflicts:
	Documentation/arm64/silicon-errata.txt
	arch/arm64/include/asm/cpucaps.h
	arch/arm64/kernel/cpu_errata.c
	drivers/mmc/core/mmc_test.c

Change-Id: Ibfaed509d545f9895e5d515f4e237d9c97c2086d
2024-10-01 11:50:22 +03:00
Greg Kroah-Hartman
da78120b92 Merge 4.19.319 into android-4.19-stable
Changes in 4.19.319
	gcc-plugins: Rename last_stmt() for GCC 14+
	scsi: qedf: Set qed_slowpath_params to zero before use
	ACPI: EC: Abort address space access upon error
	ACPI: EC: Avoid returning AE_OK on errors in address space handler
	wifi: mac80211: mesh: init nonpeer_pm to active by default in mesh sdata
	wifi: mac80211: fix UBSAN noise in ieee80211_prep_hw_scan()
	Input: silead - Always support 10 fingers
	ila: block BH in ila_output()
	kconfig: gconf: give a proper initial state to the Save button
	kconfig: remove wrong expr_trans_bool()
	fs/file: fix the check in find_next_fd()
	mei: demote client disconnect warning on suspend to debug
	wifi: cfg80211: wext: add extra SIOCSIWSCAN data check
	Input: elantech - fix touchpad state on resume for Lenovo N24
	bytcr_rt5640 : inverse jack detect for Archos 101 cesium
	can: kvaser_usb: fix return value for hif_usb_send_regout
	s390/sclp: Fix sclp_init() cleanup on failure
	ALSA: dmaengine_pcm: terminate dmaengine before synchronize
	net: usb: qmi_wwan: add Telit FN912 compositions
	net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD()
	Bluetooth: hci_core: cancel all works upon hci_unregister_dev()
	fs: better handle deep ancestor chains in is_subdir()
	spi: imx: Don't expect DMA for i.MX{25,35,50,51,53} cspi devices
	selftests/vDSO: fix clang build errors and warnings
	hfsplus: fix uninit-value in copy_name
	filelock: Remove locks reliably when fcntl/close race is detected
	ARM: 9324/1: fix get_user() broken with veneer
	ACPI: processor_idle: Fix invalid comparison with insertion sort for latency
	net: relax socket state check at accept time.
	ocfs2: add bounds checking to ocfs2_check_dir_entry()
	jfs: don't walk off the end of ealist
	filelock: Fix fcntl/close race recovery compat path
	Linux 4.19.319

Change-Id: Ic95938f445f72bf8c4604f405929da254471d15e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2024-07-31 16:26:38 +00:00
Christian Brauner
a5c4645346 fs: better handle deep ancestor chains in is_subdir()
[ Upstream commit 391b59b045004d5b985d033263ccba3e941a7740 ]

Jan reported that 'cd ..' may take a long time in deep directory
hierarchies under a bind-mount. If concurrent renames happen it is
possible to livelock in is_subdir() because it will keep retrying.

Change is_subdir() from simply retrying over and over to retry once and
then acquire the rename lock to handle deep ancestor chains better. The
list of alternatives to this approach were less then pleasant. Change
the scope of rcu lock to cover the whole walk while at it.

A big thanks to Jan and Linus. Both Jan and Linus had proposed
effectively the same thing just that one version ended up being slightly
more elegant.

Reported-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-27 10:33:43 +02:00
Michael Bestas
e8e6720b34 Merge tag 'ASB-2024-05-05_4.19-stable' of https://android.googlesource.com/kernel/common into android13-4.19-kona
https://source.android.com/docs/security/bulletin/2024-05-01
CVE-2023-4622

* tag 'ASB-2024-05-05_4.19-stable' of https://android.googlesource.com/kernel/common:
  Revert "timers: Rename del_timer_sync() to timer_delete_sync()"
  Revert "geneve: make sure to pull inner header in geneve_rx()"
  Linux 4.19.312
  amdkfd: use calloc instead of kzalloc to avoid integer overflow
  initramfs: fix populate_initrd_image() section mismatch
  ip_gre: do not report erspan version on GRE interface
  erspan: Check IFLA_GRE_ERSPAN_VER is set.
  VMCI: Fix possible memcpy() run-time warning in vmci_datagram_invoke_guest_handler()
  Bluetooth: btintel: Fixe build regression
  x86/mm/pat: fix VM_PAT handling in COW mappings
  virtio: reenable config if freezing device failed
  drm/vkms: call drm_atomic_helper_shutdown before drm_dev_put()
  tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc
  fbmon: prevent division by zero in fb_videomode_from_videomode()
  fbdev: viafb: fix typo in hw_bitblt_1 and hw_bitblt_2
  usb: sl811-hcd: only defined function checkdone if QUIRK2 is defined
  tools: iio: replace seekdir() in iio_generic_buffer
  ktest: force $buildonly = 1 for 'make_warnings_file' test type
  Input: allocate keycode for Display refresh rate toggle
  block: prevent division by zero in blk_rq_stat_sum()
  SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int
  drm/amd/display: Fix nanosec stat overflow
  media: sta2x11: fix irq handler cast
  isofs: handle CDs with bad root inode but good Joliet root directory
  scsi: lpfc: Fix possible memory leak in lpfc_rcv_padisc()
  sysv: don't call sb_bread() with pointers_lock held
  Input: synaptics-rmi4 - fail probing if memory allocation for "phys" fails
  Bluetooth: btintel: Fix null ptr deref in btintel_read_version
  btrfs: send: handle path ref underflow in header iterate_inode_ref()
  btrfs: export: handle invalid inode or root reference in btrfs_get_parent()
  btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks()
  tools/power x86_energy_perf_policy: Fix file leak in get_pkg_num()
  arm64: dts: rockchip: fix rk3399 hdmi ports node
  VMCI: Fix memcpy() run-time warning in dg_dispatch_as_host()
  wifi: ath9k: fix LNA selection in ath_ant_try_scan()
  ALSA: hda/realtek: Update Panasonic CF-SZ6 quirk to support headset with microphone
  ata: sata_mv: Fix PCI device ID table declaration compilation warning
  ata: sata_sx4: fix pdc20621_get_from_dimm() on 64-bit
  ASoC: ops: Fix wraparound for mask in snd_soc_get_volsw
  erspan: make sure erspan_base_hdr is present in skb->head
  erspan: Add type I version 0 support.
  init: open /initrd.image with O_LARGEFILE
  initramfs: switch initramfs unpacking to struct file based APIs
  fs: add a vfs_fchmod helper
  fs: add a vfs_fchown helper
  initramfs: factor out a helper to populate the initrd image
  staging: vc04_services: fix information leak in create_component()
  staging: vc04_services: changen strncpy() to strscpy_pad()
  staging: mmal-vchiq: Fix client_component for 64 bit kernel
  staging: mmal-vchiq: Allocate and free components as required
  staging: mmal-vchiq: Avoid use of bool in structures
  i40e: fix vf may be used uninitialized in this function warning
  ipv6: Fix infinite recursion in fib6_dump_done().
  selftests: reuseaddr_conflict: add missing new line at the end of the output
  net: stmmac: fix rx queue priority assignment
  net/sched: act_skbmod: prevent kernel-infoleak
  netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get()
  mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
  Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped."
  net/rds: fix possible cp null dereference
  netfilter: nf_tables: disallow timeout for anonymous sets
  Bluetooth: Fix TOCTOU in HCI debugfs implementation
  Bluetooth: hci_event: set the conn encrypted before conn establishes
  r8169: fix issue caused by buggy BIOS on certain boards with RTL8168d
  tcp: properly terminate timers for kernel sockets
  mptcp: add sk_stop_timer_sync helper
  nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet
  USB: core: Fix deadlock in usb_deauthorize_interface()
  scsi: lpfc: Correct size for wqe for memset()
  x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled
  scsi: qla2xxx: Fix command flush on cable pull
  usb: udc: remove warning when queue disabled ep
  usb: dwc2: gadget: LPM flow fix
  usb: dwc2: host: Fix ISOC flow in DDMA mode
  usb: dwc2: host: Fix hibernation flow
  usb: dwc2: host: Fix remote wakeup from hibernation
  loop: loop_set_status_from_info() check before assignment
  loop: Check for overflow while configuring loop
  loop: Factor out configuring loop from status
  powerpc: xor_vmx: Add '-mhard-float' to CFLAGS
  efivarfs: Request at most 512 bytes for variable names
  perf/core: Fix reentry problem in perf_output_read_group()
  loop: properly observe rotational flag of underlying device
  loop: Refactor loop_set_status() size calculation
  loop: Factor out setting loop device size
  loop: Remove sector_t truncation checks
  loop: Call loop_config_discard() only after new config is applied
  Revert "loop: Check for overflow while configuring loop"
  btrfs: allocate btrfs_ioctl_defrag_range_args on stack
  printk: Update @console_may_schedule in console_trylock_spinning()
  fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion
  ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs
  usb: cdc-wdm: close race between read and workqueue
  exec: Fix NOMMU linux_binprm::exec in transfer_args_to_stack()
  wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes
  mm/migrate: set swap entry values of THP tail pages properly.
  mm/memory-failure: fix an incorrect use of tail pages
  vt: fix memory overlapping when deleting chars in the buffer
  vt: fix unicode buffer corruption when deleting characters
  tty: serial: fsl_lpuart: avoid idle preamble pending if CTS is enabled
  usb: port: Don't try to peer unused USB ports based on location
  usb: gadget: ncm: Fix handling of zero block length packets
  USB: usb-storage: Prevent divide-by-0 error in isd200_ata_command
  ALSA: hda/realtek - Fix headset Mic no show at resume back for Lenovo ALC897 platform
  xfrm: Avoid clang fortify warning in copy_to_user_tmpl()
  netfilter: nf_tables: reject constant set with timeout
  netfilter: nf_tables: disallow anonymous set with timeout flag
  comedi: comedi_test: Prevent timers rescheduling during deletion
  ahci: asm1064: asm1166: don't limit reported ports
  ahci: asm1064: correct count of reported ports
  x86/CPU/AMD: Update the Zenbleed microcode revisions
  nilfs2: prevent kernel bug at submit_bh_wbc()
  nilfs2: use a more common logging style
  nilfs2: fix failure to detect DAT corruption in btree and direct mappings
  memtest: use {READ,WRITE}_ONCE in memory scanning
  drm/vc4: hdmi: do not return negative values from .get_modes()
  drm/imx/ipuv3: do not return negative values from .get_modes()
  s390/zcrypt: fix reference counting on zcrypt card objects
  soc: fsl: qbman: Use raw spinlock for cgr_lock
  soc: fsl: qbman: Add CGR update function
  soc: fsl: qbman: Add helper for sanity checking cgr ops
  soc: fsl: qbman: Always disable interrupts when taking cgr_lock
  vfio/platform: Disable virqfds on cleanup
  kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1
  speakup: Fix 8bit characters from direct synth
  slimbus: core: Remove usage of the deprecated ida_simple_xx() API
  ext4: fix corruption during on-line resize
  hwmon: (amc6821) add of_match table
  mmc: core: Fix switch on gp3 partition
  dm-raid: fix lockdep waring in "pers->hot_add_disk"
  Revert "Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d""
  PCI/PM: Drain runtime-idle callbacks before driver removal
  PCI: Drop pci_device_remove() test of pci_dev->driver
  fuse: don't unhash root
  mmc: tmio: avoid concurrent runs of mmc_request_done()
  PM: sleep: wakeirq: fix wake irq warning in system suspend
  USB: serial: cp210x: add pid/vid for TDK NC0110013M and MM0110113M
  USB: serial: option: add MeiG Smart SLM320 product
  USB: serial: cp210x: add ID for MGP Instruments PDS100
  USB: serial: add device ID for VeriFone adapter
  USB: serial: ftdi_sio: add support for GMC Z216C Adapter IR-USB
  powerpc/fsl: Fix mfpmr build errors with newer binutils
  clk: qcom: mmcc-msm8974: fix terminating of frequency table arrays
  clk: qcom: mmcc-apq8084: fix terminating of frequency table arrays
  clk: qcom: gcc-ipq8074: fix terminating of frequency table arrays
  PM: suspend: Set mem_sleep_current during kernel command line setup
  parisc: Strip upper 32 bit of sum in csum_ipv6_magic for 64-bit builds
  parisc: Fix csum_ipv6_magic on 64-bit systems
  parisc: Fix csum_ipv6_magic on 32-bit systems
  parisc: Fix ip_fast_csum
  parisc: Do not hardcode registers in checksum functions
  ubi: correct the calculation of fastmap size
  ubi: Check for too small LEB size in VTBL code
  ubifs: Set page uptodate in the correct place
  fat: fix uninitialized field in nostale filehandles
  crypto: qat - resolve race condition during AER recovery
  crypto: qat - fix double free during reset
  sparc: vDSO: fix return value of __setup handler
  sparc64: NMI watchdog: fix return value of __setup handler
  KVM: Always flush async #PF workqueue when vCPU is being destroyed
  media: xc4000: Fix atomicity violation in xc4000_get_frequency
  arm: dts: marvell: Fix maxium->maxim typo in brownstone dts
  ARM: dts: mmp2-brownstone: Don't redeclare phandle references
  smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity()
  smack: Set SMACK64TRANSMUTE only for dirs in smack_inode_setxattr()
  wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
  timers: Rename del_timer_sync() to timer_delete_sync()
  timers: Use del_timer_sync() even on UP
  timers: Update kernel-doc for various functions
  timers: Prepare support for PREEMPT_RT
  timer/trace: Improve timer tracing
  timer/trace: Replace deprecated vsprintf pointer extension %pf by %ps
  x86/bugs: Use sysfs_emit()
  x86/cpu: Support AMD Automatic IBRS
  Documentation/hw-vuln: Update spectre doc
  Linux 4.19.311
  crypto: af_alg - Work around empty control messages without MSG_MORE
  crypto: af_alg - Fix regression on empty requests
  spi: spi-mt65xx: Fix NULL pointer access in interrupt handler
  net/bnx2x: Prevent access to a freed page in page_pool
  hsr: Handle failures in module init
  rds: introduce acquire/release ordering in acquire/release_in_xmit()
  hsr: Fix uninit-value access in hsr_get_node()
  net: hsr: fix placement of logical operator in a multi-line statement
  usb: gadget: net2272: Use irqflags in the call to net2272_probe_fin
  staging: greybus: fix get_channel_from_mode() failure path
  serial: 8250_exar: Don't remove GPIO device on suspend
  rtc: mt6397: select IRQ_DOMAIN instead of depending on it
  kconfig: fix infinite loop when expanding a macro at the end of file
  tty: serial: samsung: fix tx_empty() to return TIOCSER_TEMT
  serial: max310x: fix syntax error in IRQ error message
  clk: qcom: gdsc: Add support to update GDSC transition delay
  NFS: Fix an off by one in root_nfs_cat()
  net: sunrpc: Fix an off by one in rpc_sockaddr2uaddr()
  scsi: bfa: Fix function pointer type mismatch for hcb_qe->cbfn
  scsi: csiostor: Avoid function pointer casts
  ALSA: usb-audio: Stop parsing channels bits when all channels are found.
  sparc32: Fix section mismatch in leon_pci_grpci
  backlight: lp8788: Fully initialize backlight_properties during probe
  backlight: lm3639: Fully initialize backlight_properties during probe
  backlight: da9052: Fully initialize backlight_properties during probe
  backlight: lm3630a: Don't set bl->props.brightness in get_brightness
  backlight: lm3630a: Initialize backlight_properties on init
  powerpc/embedded6xx: Fix no previous prototype for avr_uart_send() etc.
  powerpc/hv-gpci: Fix the H_GET_PERF_COUNTER_INFO hcall return value checks
  drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip
  media: go7007: fix a memleak in go7007_load_encoder
  media: dvb-frontends: avoid stack overflow warnings with clang
  media: pvrusb2: fix uaf in pvr2_context_set_notify
  drm/amdgpu: Fix missing break in ATOM_ARG_IMM Case of atom_get_src_int()
  ASoC: meson: axg-tdm-interface: fix mclk setup without mclk-fs
  mtd: rawnand: lpc32xx_mlc: fix irq handler prototype
  crypto: arm/sha - fix function cast warnings
  crypto: arm - Rename functions to avoid conflict with crypto/sha256.h
  mfd: syscon: Call of_node_put() only when of_parse_phandle() takes a ref
  drm/tegra: put drm_gem_object ref on error in tegra_fb_create
  clk: hisilicon: hi3519: Release the correct number of gates in hi3519_clk_unregister()
  PCI: Mark 3ware-9650SE Root Port Extended Tags as broken
  drm/mediatek: dsi: Fix DSI RGB666 formats and definitions
  clk: qcom: dispcc-sdm845: Adjust internal GDSC wait times
  firmware: qcom: scm: Add WLAN VMID for Qualcomm SCM interface
  media: pvrusb2: fix pvr2_stream_callback casts
  media: go7007: add check of return value of go7007_read_addr()
  ALSA: seq: fix function cast warnings
  drm/radeon/ni: Fix wrong firmware size logging in ni_init_microcode()
  perf thread_map: Free strlist on normal path in thread_map__new_by_tid_str()
  quota: Fix rcu annotations of inode dquot pointers
  quota: Fix potential NULL pointer dereference
  quota: simplify drop_dquot_ref()
  quota: check time limit when back out space/inode change
  fs/quota: erase unused but set variable warning
  quota: code cleanup for __dquot_alloc_space()
  clk: qcom: reset: Ensure write completion on reset de/assertion
  clk: qcom: reset: Commonize the de/assert functions
  clk: qcom: reset: support resetting multiple bits
  clk: qcom: reset: Allow specifying custom reset delay
  media: edia: dvbdev: fix a use-after-free
  media: dvb-core: Fix use-after-free due to race at dvb_register_device()
  media: dvbdev: fix error logic at dvb_register_device()
  media: dvbdev: Fix memleak in dvb_register_device
  media: media/dvb: Use kmemdup rather than duplicating its implementation
  media: dvbdev: remove double-unlock
  media: v4l2-mem2mem: fix a memleak in v4l2_m2m_register_entity
  media: v4l2-tpg: fix some memleaks in tpg_alloc
  media: em28xx: annotate unchecked call to media_device_register()
  ABI: sysfs-bus-pci-devices-aer_stats uses an invalid tag
  perf evsel: Fix duplicate initialization of data->id in evsel__parse_sample()
  media: tc358743: register v4l2 async device only after successful setup
  drm/rockchip: lvds: do not print scary message when probing defer
  drm/rockchip: lvds: do not overwrite error code
  drm: Don't treat 0 as -1 in drm_fixp2int_ceil
  drm/rockchip: inno_hdmi: Fix video timing
  drm/tegra: dsi: Fix missing pm_runtime_disable() in the error handling path of tegra_dsi_probe()
  drm/tegra: dsi: Fix some error handling paths in tegra_dsi_probe()
  drm/tegra: dsi: Make use of the helper function dev_err_probe()
  gpu: host1x: mipi: Update tegra_mipi_request() to be node based
  drm/tegra: dsi: Add missing check for of_find_device_by_node
  dm: call the resume method on internal suspend
  dm raid: fix false positive for requeue needed during reshape
  nfp: flower: handle acti_netdevs allocation failure
  net/x25: fix incorrect parameter validation in the x25_getsockopt() function
  net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function
  udp: fix incorrect parameter validation in the udp_lib_getsockopt() function
  l2tp: fix incorrect parameter validation in the pppol2tp_getsockopt() function
  tcp: fix incorrect parameter validation in the do_tcp_getsockopt() function
  ipv6: fib6_rules: flush route cache when rule is changed
  bpf: Fix stackmap overflow check on 32-bit arches
  bpf: Fix hashtab overflow check on 32-bit arches
  sr9800: Add check for usbnet_get_endpoints
  Bluetooth: hci_core: Fix possible buffer overflow
  Bluetooth: Remove superfluous call to hci_conn_check_pending()
  igb: Fix missing time sync events
  igb: move PEROUT and EXTTS isr logic to separate functions
  mmc: wmt-sdmmc: remove an incorrect release_mem_region() call in the .remove function
  SUNRPC: fix some memleaks in gssx_dec_option_array
  x86, relocs: Ignore relocations in .notes section
  ACPI: scan: Fix device check notification handling
  ARM: dts: arm: realview: Fix development chip ROM compatible value
  wifi: brcmsmac: avoid function pointer casts
  iommu/amd: Mark interrupt as managed
  bus: tegra-aconnect: Update dependency to ARCH_TEGRA
  ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()
  wifi: libertas: fix some memleaks in lbs_allocate_cmd_buffer()
  af_unix: Annotate data-race of gc_in_progress in wait_for_unix_gc().
  sock_diag: annotate data-races around sock_diag_handlers[family]
  wifi: mwifiex: debugfs: Drop unnecessary error check for debugfs_create_dir()
  wifi: b43: Disable QoS for bcm4331
  wifi: b43: Stop correct queue in DMA worker when QoS is disabled
  b43: main: Fix use true/false for bool type
  wifi: b43: Stop/wake correct queue in PIO Tx path when QoS is disabled
  wifi: b43: Stop/wake correct queue in DMA Tx path when QoS is disabled
  b43: dma: Fix use true/false for bool type variable
  wifi: ath10k: fix NULL pointer dereference in ath10k_wmi_tlv_op_pull_mgmt_tx_compl_ev()
  timekeeping: Fix cross-timestamp interpolation for non-x86
  timekeeping: Fix cross-timestamp interpolation corner case decision
  timekeeping: Fix cross-timestamp interpolation on counter wrap
  aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts
  md: Don't clear MD_CLOSING when the raid is about to stop
  md: implement ->set_read_only to hook into BLKROSET processing
  block: add a new set_read_only method
  md: switch to ->check_events for media change notifications
  fs/select: rework stack allocation hack for clang
  do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
  crypto: algif_aead - Only wake up when ctx->more is zero
  crypto: af_alg - make some functions static
  crypto: algif_aead - fix uninitialized ctx->init
  ASoC: wm8962: Fix up incorrect error message in wm8962_set_fll
  ASoC: wm8962: Enable both SPKOUTR_ENA and SPKOUTL_ENA in mono mode
  ASoC: wm8962: Enable oscillator if selecting WM8962_FLL_OSC
  Input: gpio_keys_polled - suppress deferred probe error for gpio
  ASoC: Intel: bytcr_rt5640: Add an extra entry for the Chuwi Vi8 tablet
  firewire: core: use long bus reset on gap count error
  Bluetooth: rfcomm: Fix null-ptr-deref in rfcomm_check_security
  scsi: mpt3sas: Prevent sending diag_reset when the controller is ready
  dm-verity, dm-crypt: align "struct bvec_iter" correctly
  block: sed-opal: handle empty atoms when parsing response
  net/iucv: fix the allocation size of iucv_path_table array
  MIPS: Clear Cause.BD in instruction_pointer_set
  x86/xen: Add some null pointer checking to smp.c
  ASoC: rt5645: Make LattePanda board DMI match more precise
  Linux 4.19.310
  selftests/vm: fix map_hugetlb length used for testing read and write
  selftests/vm: fix display of page size in map_hugetlb
  getrusage: use sig->stats_lock rather than lock_task_sighand()
  getrusage: use __for_each_thread()
  getrusage: move thread_group_cputime_adjusted() outside of lock_task_sighand()
  getrusage: add the "signal_struct *sig" local variable
  y2038: rusage: use __kernel_old_timeval
  hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed
  hv_netvsc: use netif_is_bond_master() instead of open code
  hv_netvsc: Make netvsc/VF binding check both MAC and serial number
  Input: i8042 - fix strange behavior of touchpad on Clevo NS70PU
  um: allow not setting extra rpaths in the linux binary
  selftests: mm: fix map_hugetlb failure on 64K page size systems
  tools/selftest/vm: allow choosing mem size and page size in map_hugetlb
  btrfs: ref-verify: free ref cache before clearing mount opt
  netrom: Fix data-races around sysctl_net_busy_read
  netrom: Fix a data-race around sysctl_netrom_link_fails_count
  netrom: Fix a data-race around sysctl_netrom_routing_control
  netrom: Fix a data-race around sysctl_netrom_transport_no_activity_timeout
  netrom: Fix a data-race around sysctl_netrom_transport_requested_window_size
  netrom: Fix a data-race around sysctl_netrom_transport_busy_delay
  netrom: Fix a data-race around sysctl_netrom_transport_acknowledge_delay
  netrom: Fix a data-race around sysctl_netrom_transport_maximum_tries
  netrom: Fix a data-race around sysctl_netrom_transport_timeout
  netrom: Fix data-races around sysctl_netrom_network_ttl_initialiser
  netrom: Fix a data-race around sysctl_netrom_obsolescence_count_initialiser
  netrom: Fix a data-race around sysctl_netrom_default_path_quality
  netfilter: nf_conntrack_h323: Add protection for bmp length out of range
  net/rds: fix WARNING in rds_conn_connect_if_down
  net/ipv6: avoid possible UAF in ip6_route_mpath_notify()
  geneve: make sure to pull inner header in geneve_rx()
  net: move definition of pcpu_lstats to header file
  net: lan78xx: fix runtime PM count underflow on link stop
  lan78xx: Fix race conditions in suspend/resume handling
  lan78xx: Fix partial packet errors on suspend/resume
  lan78xx: Add missing return code checks
  lan78xx: Fix white space and style issues
  net: usb: lan78xx: Remove lots of set but unused 'ret' variables
  Linux 4.19.309
  gpio: 74x164: Enable output pins after registers are reset
  cachefiles: fix memory leak in cachefiles_add_cache()
  mmc: core: Fix eMMC initialization with 1-bit bus connection
  btrfs: dev-replace: properly validate device names
  wifi: nl80211: reject iftype change with mesh ID change
  gtp: fix use-after-free and null-ptr-deref in gtp_newlink()
  ALSA: Drop leftover snd-rtctimer stuff from Makefile
  power: supply: bq27xxx-i2c: Do not free non existing IRQ
  efi/capsule-loader: fix incorrect allocation size
  Bluetooth: Enforce validation on max value of connection interval
  Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
  Bluetooth: Avoid potential use-after-free in hci_error_reset
  net: usb: dm9601: fix wrong return value in dm9601_mdio_read
  lan78xx: enable auto speed configuration for LAN7850 if no EEPROM is detected
  tun: Fix xdp_rxq_info's queue_index when detaching
  netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
  Linux 4.19.308
  scripts/bpf: Fix xdp_md forward declaration typo
  fs/aio: Restrict kiocb_set_cancel_fn() to I/O submitted via libaio
  KVM: arm64: vgic-its: Test for valid IRQ in MOVALL handler
  KVM: arm64: vgic-its: Test for valid IRQ in its_sync_lpi_pending_table()
  PCI/MSI: Prevent MSI hardware interrupt number truncation
  s390: use the correct count for __iowrite64_copy()
  packet: move from strlcpy with unused retval to strscpy
  ipv6: sr: fix possible use-after-free and null-ptr-deref
  nouveau: fix function cast warnings
  scsi: jazz_esp: Only build if SCSI core is builtin
  bpf, scripts: Correct GPL license name
  scripts/bpf: teach bpf_helpers_doc.py to dump BPF helper definitions
  RDMA/srpt: fix function pointer cast warnings
  RDMA/srpt: Make debug output more detailed
  RDMA/ulp: Use dev_name instead of ibdev->name
  RDMA/srpt: Support specifying the srpt_service_guid parameter
  RDMA/bnxt_re: Return error for SRQ resize
  IB/hfi1: Fix a memleak in init_credit_return
  usb: roles: don't get/set_role() when usb_role_switch is unregistered
  usb: gadget: ncm: Avoid dropping datagrams of properly parsed NTBs
  ARM: ep93xx: Add terminator to gpiod_lookup_table
  l2tp: pass correct message length to ip6_append_data
  gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()
  dm-crypt: don't modify the data when using authenticated encryption
  mm: memcontrol: switch to rcu protection in drain_all_stock()
  IB/hfi1: Fix sdma.h tx->num_descs off-by-one error
  pmdomain: renesas: r8a77980-sysc: CR7 must be always on
  s390/qeth: Fix potential loss of L3-IP@ in case of network issues
  virtio-blk: Ensure no requests in virtqueues before deleting vqs.
  firewire: core: send bus reset promptly on gap count error
  hwmon: (coretemp) Enlarge per package core count limit
  regulator: pwm-regulator: Add validity checks in continuous .get_voltage
  ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal()
  ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
  ahci: asm1166: correct count of reported ports
  fbdev: sis: Error out if pixclock equals zero
  fbdev: savage: Error out if pixclock equals zero
  wifi: mac80211: fix race condition on enabling fast-xmit
  wifi: cfg80211: fix missing interfaces when dumping
  dmaengine: shdma: increase size of 'dev_id'
  scsi: target: core: Add TMF to tmr_list handling
  sched/rt: Disallow writing invalid values to sched_rt_period_us
  sched/rt: sysctl_sched_rr_timeslice show default timeslice after reset
  sched/rt: Fix sysctl_sched_rr_timeslice intial value
  userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb
  nilfs2: replace WARN_ONs for invalid DAT metadata block requests
  memcg: add refcnt for pcpu stock to avoid UAF problem in drain_all_stock()
  net: stmmac: fix notifier registration
  stmmac: no need to check return value of debugfs_create functions
  net/sched: Retire dsmark qdisc
  net/sched: Retire ATM qdisc
  net/sched: Retire CBQ qdisc
  Linux 4.19.307
  netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval()
  lsm: new security_file_ioctl_compat() hook
  nilfs2: fix potential bug in end_buffer_async_write
  sched/membarrier: reduce the ability to hammer on sys_membarrier
  Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d"
  pmdomain: core: Move the unused cleanup to a _sync initcall
  irqchip/irq-brcmstb-l2: Add write memory barrier before exit
  nfp: use correct macro for LengthSelect in BAR config
  nilfs2: fix hang in nilfs_lookup_dirty_data_buffers()
  nilfs2: fix data corruption in dsync block recovery for small block sizes
  ALSA: hda/conexant: Add quirk for SWS JS201D
  x86/mm/ident_map: Use gbpages only where full GB page should be mapped.
  x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6
  serial: max310x: improve crystal stable clock detection
  serial: max310x: set default value when reading clock ready bit
  ring-buffer: Clean ring_buffer_poll_wait() error return
  staging: iio: ad5933: fix type mismatch regression
  ext4: fix double-free of blocks due to wrong extents moved_len
  binder: signal epoll threads of self-work
  xen-netback: properly sync TX responses
  nfc: nci: free rx_data_reassembly skb on NCI device cleanup
  firewire: core: correct documentation of fw_csr_string() kernel API
  scsi: Revert "scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock"
  usb: f_mass_storage: forbid async queue when shutdown happen
  USB: hub: check for alternate port before enabling A_ALT_HNP_SUPPORT
  HID: wacom: Do not register input devices until after hid_hw_start
  HID: wacom: generic: Avoid reporting a serial of '0' to userspace
  mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again
  tracing/trigger: Fix to return error if failed to alloc snapshot
  i40e: Fix waiting for queues of all VSIs to be disabled
  MIPS: Add 'memory' clobber to csum_ipv6_magic() inline assembler
  net: sysfs: Fix /sys/class/net/<iface> path for statistics
  Documentation: net-sysfs: describe missing statistics
  ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()
  spi: ppc4xx: Drop write-only variable
  btrfs: send: return EOPNOTSUPP on unknown flags
  btrfs: forbid creating subvol qgroups
  hrtimer: Report offline hrtimer enqueue
  vhost: use kzalloc() instead of kmalloc() followed by memset()
  Input: atkbd - skip ATKBD_CMD_SETLEDS when skipping ATKBD_CMD_GETID
  USB: serial: cp210x: add ID for IMST iM871A-USB
  USB: serial: option: add Fibocom FM101-GL variant
  USB: serial: qcserial: add new usb-id for Dell Wireless DW5826e
  net/af_iucv: clean up a try_then_request_module()
  netfilter: nft_compat: restrict match/target protocol to u16
  netfilter: nft_compat: reject unused compat flag
  ppp_async: limit MRU to 64K
  tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()
  rxrpc: Fix response to PING RESPONSE ACKs to a dead call
  inet: read sk->sk_family once in inet_recv_error()
  hwmon: (coretemp) Fix bogus core_id to attr name mapping
  hwmon: (coretemp) Fix out-of-bounds memory access
  hwmon: (aspeed-pwm-tacho) mutex for tach reading
  atm: idt77252: fix a memleak in open_card_ubr0
  phy: ti: phy-omap-usb2: Fix NULL pointer dereference for SRP
  dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV
  bonding: remove print in bond_verify_device_path
  HID: apple: Add 2021 magic keyboard FN key mapping
  HID: apple: Swap the Fn and Left Control keys on Apple keyboards
  HID: apple: Add support for the 2021 Magic Keyboard
  net: sysfs: Fix /sys/class/net/<iface> path
  af_unix: fix lockdep positive in sk_diag_dump_icons()
  net: ipv4: fix a memleak in ip_setup_cork
  netfilter: nf_log: replace BUG_ON by WARN_ON_ONCE when putting logger
  llc: call sock_orphan() at release time
  ipv6: Ensure natural alignment of const ipv6 loopback and router addresses
  ixgbe: Fix an error handling path in ixgbe_read_iosf_sb_reg_x550()
  ixgbe: Refactor overtemp event handling
  ixgbe: Refactor returning internal error codes
  ixgbe: Remove non-inclusive language
  net: remove unneeded break
  scsi: isci: Fix an error code problem in isci_io_request_build()
  wifi: cfg80211: fix RCU dereference in __cfg80211_bss_update
  drm/amdgpu: Release 'adev->pm.fw' before return in 'amdgpu_device_need_post()'
  ceph: fix deadlock or deadcode of misusing dget()
  blk-mq: fix IO hang from sbitmap wakeup race
  virtio_net: Fix "‘%d’ directive writing between 1 and 11 bytes into a region of size 10" warnings
  libsubcmd: Fix memory leak in uniq()
  usb: hub: Replace hardcoded quirk value with BIT() macro
  PCI: Only override AMD USB controller if required
  mfd: ti_am335x_tscadc: Fix TI SoC dependencies
  um: net: Fix return type of uml_net_start_xmit()
  um: Don't use vfprintf() for os_info()
  um: Fix naming clash between UML and scheduler
  leds: trigger: panic: Don't register panic notifier if creating the trigger failed
  drm/amdgpu: Drop 'fence' check in 'to_amdgpu_amdkfd_fence()'
  drm/amdgpu: Let KFD sync with VM fences
  clk: mmp: pxa168: Fix memory leak in pxa168_clk_init()
  clk: hi3620: Fix memory leak in hi3620_mmc_clk_init()
  drm/msm/dpu: Ratelimit framedone timeout msgs
  media: ddbridge: fix an error code problem in ddb_probe
  IB/ipoib: Fix mcast list locking
  drm/exynos: Call drm_atomic_helper_shutdown() at shutdown/unbind time
  ALSA: hda: Intel: add HDA_ARL PCI ID support
  PCI: add INTEL_HDA_ARL to pci_ids.h
  media: rockchip: rga: fix swizzling for RGB formats
  media: stk1160: Fixed high volume of stk1160_dbg messages
  drm/mipi-dsi: Fix detach call without attach
  drm/framebuffer: Fix use of uninitialized variable
  drm/drm_file: fix use of uninitialized variable
  RDMA/IPoIB: Fix error code return in ipoib_mcast_join
  fast_dput(): handle underflows gracefully
  ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument
  f2fs: fix to check return value of f2fs_reserve_new_block()
  wifi: cfg80211: free beacon_ies when overridden from hidden BSS
  wifi: rtlwifi: rtl8723{be,ae}: using calculate_bit_shift()
  wifi: rtl8xxxu: Add additional USB IDs for RTL8192EU devices
  md: Whenassemble the array, consult the superblock of the freshest device
  ARM: dts: imx23/28: Fix the DMA controller node name
  ARM: dts: imx23-sansa: Use preferred i2c-gpios properties
  ARM: dts: imx27-apf27dev: Fix LED name
  ARM: dts: imx1: Fix sram node
  ARM: dts: imx27: Fix sram node
  ARM: dts: imx: Use flash@0,0 pattern
  ARM: dts: imx25/27-eukrea: Fix RTC node name
  ARM: dts: rockchip: fix rk3036 hdmi ports node
  scsi: libfc: Fix up timeout error in fc_fcp_rec_error()
  scsi: libfc: Don't schedule abort twice
  bpf: Add map and need_defer parameters to .map_fd_put_ptr()
  wifi: ath9k: Fix potential array-index-out-of-bounds read in ath9k_htc_txstatus()
  ARM: dts: imx7s: Fix nand-controller #size-cells
  ARM: dts: imx7s: Fix lcdif compatible
  bonding: return -ENOMEM instead of BUG in alb_upper_dev_walk
  PCI: Add no PM reset quirk for NVIDIA Spectrum devices
  scsi: lpfc: Fix possible file string name overflow when updating firmware
  ext4: avoid online resizing failures due to oversized flex bg
  ext4: remove unnecessary check from alloc_flex_gd()
  ext4: unify the type of flexbg_size to unsigned int
  ext4: fix inconsistent between segment fstrim and full fstrim
  SUNRPC: Fix a suspicious RCU usage warning
  KVM: s390: fix setting of fpc register
  s390/ptrace: handle setting of fpc register correctly
  jfs: fix array-index-out-of-bounds in diNewExt
  rxrpc_find_service_conn_rcu: fix the usage of read_seqbegin_or_lock()
  afs: fix the usage of read_seqbegin_or_lock() in afs_find_server*()
  crypto: stm32/crc32 - fix parsing list of devices
  pstore/ram: Fix crash when setting number of cpus to an odd number
  jfs: fix uaf in jfs_evict_inode
  jfs: fix array-index-out-of-bounds in dbAdjTree
  jfs: fix slab-out-of-bounds Read in dtSearch
  UBSAN: array-index-out-of-bounds in dtSplitRoot
  FS:JFS:UBSAN:array-index-out-of-bounds in dbAdjTree
  ACPI: extlog: fix NULL pointer dereference check
  PNP: ACPI: fix fortify warning
  ACPI: video: Add quirk for the Colorful X15 AT 23 Laptop
  audit: Send netlink ACK before setting connection in auditd_set
  powerpc/lib: Validate size for vector operations
  powerpc/mm: Fix build failures due to arch_reserved_kernel_pages()
  powerpc: Fix build error due to is_valid_bugaddr()
  powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
  net/sched: cbs: Fix not adding cbs instance to list
  x86/entry/ia32: Ensure s32 is sign extended to s64
  tick/sched: Preserve number of idle sleeps across CPU hotplug events
  mips: Call lose_fpu(0) before initializing fcr31 in mips_set_personality_nan
  gpio: eic-sprd: Clear interrupt after set the interrupt type
  drm/exynos: gsc: minor fix for loop iteration in gsc_runtime_resume
  drm/bridge: nxp-ptn3460: simplify some error checking
  drm/bridge: nxp-ptn3460: fix i2c_master_send() error checking
  drm: Don't unref the same fb many times by mistake due to deadlock handling
  gpiolib: acpi: Ignore touchpad wakeup on GPD G1619-04
  netfilter: nf_tables: reject QUEUE/DROP verdict parameters
  btrfs: defrag: reject unknown flags of btrfs_ioctl_defrag_range_args
  btrfs: don't warn if discard range is not aligned to sector
  net: fec: fix the unhandled context fault from smmu
  fjes: fix memleaks in fjes_hw_setup
  netfilter: nf_tables: restrict anonymous set and map names to 16 bytes
  net/mlx5e: fix a double-free in arfs_create_groups
  net/mlx5: Use kfree(ft->g) in arfs_create_groups()
  netlink: fix potential sleeping issue in mqueue_flush_file

 Conflicts:
	include/linux/fs.h
	include/linux/timer.h
	init/initramfs.c
	kernel/time/timer.c
	mm/memory-failure.c
	mm/page_alloc.c
	net/core/sock.c
	scripts/Makefile.extrawarn

Change-Id: I0ccfce4c1a43240cfb997b426ef9fc59e61e3c55
2024-05-07 22:02:57 +03:00
Greg Kroah-Hartman
45df1db3d3 Merge 4.19.307 into android-4.19-stable
Changes in 4.19.307
	PCI: mediatek: Clear interrupt status before dispatching handler
	include/linux/units.h: add helpers for kelvin to/from Celsius conversion
	units: Add Watt units
	units: change from 'L' to 'UL'
	units: add the HZ macros
	serial: sc16is7xx: set safe default SPI clock frequency
	driver core: add device probe log helper
	spi: introduce SPI_MODE_X_MASK macro
	serial: sc16is7xx: add check for unsupported SPI modes during probe
	ext4: allow for the last group to be marked as trimmed
	crypto: api - Disallow identical driver names
	PM: hibernate: Enforce ordering during image compression/decompression
	hwrng: core - Fix page fault dead lock on mmap-ed hwrng
	rpmsg: virtio: Free driver_override when rpmsg_remove()
	parisc/firmware: Fix F-extend for PDC addresses
	nouveau/vmm: don't set addr on the fail path to avoid warning
	block: Remove special-casing of compound pages
	powerpc: Use always instead of always-y in for crtsavres.o
	x86/CPU/AMD: Fix disabling XSAVES on AMD family 0x17 due to erratum
	driver core: Annotate dev_err_probe() with __must_check
	Revert "driver core: Annotate dev_err_probe() with __must_check"
	driver code: print symbolic error code
	drivers: core: fix kernel-doc markup for dev_err_probe()
	net/smc: fix illegal rmb_desc access in SMC-D connection dump
	vlan: skip nested type that is not IFLA_VLAN_QOS_MAPPING
	llc: make llc_ui_sendmsg() more robust against bonding changes
	llc: Drop support for ETH_P_TR_802_2.
	net/rds: Fix UBSAN: array-index-out-of-bounds in rds_cmsg_recv
	tracing: Ensure visibility when inserting an element into tracing_map
	tcp: Add memory barrier to tcp_push()
	netlink: fix potential sleeping issue in mqueue_flush_file
	net/mlx5: Use kfree(ft->g) in arfs_create_groups()
	net/mlx5e: fix a double-free in arfs_create_groups
	netfilter: nf_tables: restrict anonymous set and map names to 16 bytes
	fjes: fix memleaks in fjes_hw_setup
	net: fec: fix the unhandled context fault from smmu
	btrfs: don't warn if discard range is not aligned to sector
	btrfs: defrag: reject unknown flags of btrfs_ioctl_defrag_range_args
	netfilter: nf_tables: reject QUEUE/DROP verdict parameters
	gpiolib: acpi: Ignore touchpad wakeup on GPD G1619-04
	drm: Don't unref the same fb many times by mistake due to deadlock handling
	drm/bridge: nxp-ptn3460: fix i2c_master_send() error checking
	drm/bridge: nxp-ptn3460: simplify some error checking
	drm/exynos: gsc: minor fix for loop iteration in gsc_runtime_resume
	gpio: eic-sprd: Clear interrupt after set the interrupt type
	mips: Call lose_fpu(0) before initializing fcr31 in mips_set_personality_nan
	tick/sched: Preserve number of idle sleeps across CPU hotplug events
	x86/entry/ia32: Ensure s32 is sign extended to s64
	net/sched: cbs: Fix not adding cbs instance to list
	powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
	powerpc: Fix build error due to is_valid_bugaddr()
	powerpc/mm: Fix build failures due to arch_reserved_kernel_pages()
	powerpc/lib: Validate size for vector operations
	audit: Send netlink ACK before setting connection in auditd_set
	ACPI: video: Add quirk for the Colorful X15 AT 23 Laptop
	PNP: ACPI: fix fortify warning
	ACPI: extlog: fix NULL pointer dereference check
	FS:JFS:UBSAN:array-index-out-of-bounds in dbAdjTree
	UBSAN: array-index-out-of-bounds in dtSplitRoot
	jfs: fix slab-out-of-bounds Read in dtSearch
	jfs: fix array-index-out-of-bounds in dbAdjTree
	jfs: fix uaf in jfs_evict_inode
	pstore/ram: Fix crash when setting number of cpus to an odd number
	crypto: stm32/crc32 - fix parsing list of devices
	afs: fix the usage of read_seqbegin_or_lock() in afs_find_server*()
	rxrpc_find_service_conn_rcu: fix the usage of read_seqbegin_or_lock()
	jfs: fix array-index-out-of-bounds in diNewExt
	s390/ptrace: handle setting of fpc register correctly
	KVM: s390: fix setting of fpc register
	SUNRPC: Fix a suspicious RCU usage warning
	ext4: fix inconsistent between segment fstrim and full fstrim
	ext4: unify the type of flexbg_size to unsigned int
	ext4: remove unnecessary check from alloc_flex_gd()
	ext4: avoid online resizing failures due to oversized flex bg
	scsi: lpfc: Fix possible file string name overflow when updating firmware
	PCI: Add no PM reset quirk for NVIDIA Spectrum devices
	bonding: return -ENOMEM instead of BUG in alb_upper_dev_walk
	ARM: dts: imx7s: Fix lcdif compatible
	ARM: dts: imx7s: Fix nand-controller #size-cells
	wifi: ath9k: Fix potential array-index-out-of-bounds read in ath9k_htc_txstatus()
	bpf: Add map and need_defer parameters to .map_fd_put_ptr()
	scsi: libfc: Don't schedule abort twice
	scsi: libfc: Fix up timeout error in fc_fcp_rec_error()
	ARM: dts: rockchip: fix rk3036 hdmi ports node
	ARM: dts: imx25/27-eukrea: Fix RTC node name
	ARM: dts: imx: Use flash@0,0 pattern
	ARM: dts: imx27: Fix sram node
	ARM: dts: imx1: Fix sram node
	ARM: dts: imx27-apf27dev: Fix LED name
	ARM: dts: imx23-sansa: Use preferred i2c-gpios properties
	ARM: dts: imx23/28: Fix the DMA controller node name
	md: Whenassemble the array, consult the superblock of the freshest device
	wifi: rtl8xxxu: Add additional USB IDs for RTL8192EU devices
	wifi: rtlwifi: rtl8723{be,ae}: using calculate_bit_shift()
	wifi: cfg80211: free beacon_ies when overridden from hidden BSS
	f2fs: fix to check return value of f2fs_reserve_new_block()
	ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument
	fast_dput(): handle underflows gracefully
	RDMA/IPoIB: Fix error code return in ipoib_mcast_join
	drm/drm_file: fix use of uninitialized variable
	drm/framebuffer: Fix use of uninitialized variable
	drm/mipi-dsi: Fix detach call without attach
	media: stk1160: Fixed high volume of stk1160_dbg messages
	media: rockchip: rga: fix swizzling for RGB formats
	PCI: add INTEL_HDA_ARL to pci_ids.h
	ALSA: hda: Intel: add HDA_ARL PCI ID support
	drm/exynos: Call drm_atomic_helper_shutdown() at shutdown/unbind time
	IB/ipoib: Fix mcast list locking
	media: ddbridge: fix an error code problem in ddb_probe
	drm/msm/dpu: Ratelimit framedone timeout msgs
	clk: hi3620: Fix memory leak in hi3620_mmc_clk_init()
	clk: mmp: pxa168: Fix memory leak in pxa168_clk_init()
	drm/amdgpu: Let KFD sync with VM fences
	drm/amdgpu: Drop 'fence' check in 'to_amdgpu_amdkfd_fence()'
	leds: trigger: panic: Don't register panic notifier if creating the trigger failed
	um: Fix naming clash between UML and scheduler
	um: Don't use vfprintf() for os_info()
	um: net: Fix return type of uml_net_start_xmit()
	mfd: ti_am335x_tscadc: Fix TI SoC dependencies
	PCI: Only override AMD USB controller if required
	usb: hub: Replace hardcoded quirk value with BIT() macro
	libsubcmd: Fix memory leak in uniq()
	virtio_net: Fix "‘%d’ directive writing between 1 and 11 bytes into a region of size 10" warnings
	blk-mq: fix IO hang from sbitmap wakeup race
	ceph: fix deadlock or deadcode of misusing dget()
	drm/amdgpu: Release 'adev->pm.fw' before return in 'amdgpu_device_need_post()'
	wifi: cfg80211: fix RCU dereference in __cfg80211_bss_update
	scsi: isci: Fix an error code problem in isci_io_request_build()
	net: remove unneeded break
	ixgbe: Remove non-inclusive language
	ixgbe: Refactor returning internal error codes
	ixgbe: Refactor overtemp event handling
	ixgbe: Fix an error handling path in ixgbe_read_iosf_sb_reg_x550()
	ipv6: Ensure natural alignment of const ipv6 loopback and router addresses
	llc: call sock_orphan() at release time
	netfilter: nf_log: replace BUG_ON by WARN_ON_ONCE when putting logger
	net: ipv4: fix a memleak in ip_setup_cork
	af_unix: fix lockdep positive in sk_diag_dump_icons()
	net: sysfs: Fix /sys/class/net/<iface> path
	HID: apple: Add support for the 2021 Magic Keyboard
	HID: apple: Swap the Fn and Left Control keys on Apple keyboards
	HID: apple: Add 2021 magic keyboard FN key mapping
	bonding: remove print in bond_verify_device_path
	dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV
	phy: ti: phy-omap-usb2: Fix NULL pointer dereference for SRP
	atm: idt77252: fix a memleak in open_card_ubr0
	hwmon: (aspeed-pwm-tacho) mutex for tach reading
	hwmon: (coretemp) Fix out-of-bounds memory access
	hwmon: (coretemp) Fix bogus core_id to attr name mapping
	inet: read sk->sk_family once in inet_recv_error()
	rxrpc: Fix response to PING RESPONSE ACKs to a dead call
	tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()
	ppp_async: limit MRU to 64K
	netfilter: nft_compat: reject unused compat flag
	netfilter: nft_compat: restrict match/target protocol to u16
	net/af_iucv: clean up a try_then_request_module()
	USB: serial: qcserial: add new usb-id for Dell Wireless DW5826e
	USB: serial: option: add Fibocom FM101-GL variant
	USB: serial: cp210x: add ID for IMST iM871A-USB
	Input: atkbd - skip ATKBD_CMD_SETLEDS when skipping ATKBD_CMD_GETID
	vhost: use kzalloc() instead of kmalloc() followed by memset()
	hrtimer: Report offline hrtimer enqueue
	btrfs: forbid creating subvol qgroups
	btrfs: send: return EOPNOTSUPP on unknown flags
	spi: ppc4xx: Drop write-only variable
	ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()
	Documentation: net-sysfs: describe missing statistics
	net: sysfs: Fix /sys/class/net/<iface> path for statistics
	MIPS: Add 'memory' clobber to csum_ipv6_magic() inline assembler
	i40e: Fix waiting for queues of all VSIs to be disabled
	tracing/trigger: Fix to return error if failed to alloc snapshot
	mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again
	HID: wacom: generic: Avoid reporting a serial of '0' to userspace
	HID: wacom: Do not register input devices until after hid_hw_start
	USB: hub: check for alternate port before enabling A_ALT_HNP_SUPPORT
	usb: f_mass_storage: forbid async queue when shutdown happen
	scsi: Revert "scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock"
	firewire: core: correct documentation of fw_csr_string() kernel API
	nfc: nci: free rx_data_reassembly skb on NCI device cleanup
	xen-netback: properly sync TX responses
	binder: signal epoll threads of self-work
	ext4: fix double-free of blocks due to wrong extents moved_len
	staging: iio: ad5933: fix type mismatch regression
	ring-buffer: Clean ring_buffer_poll_wait() error return
	serial: max310x: set default value when reading clock ready bit
	serial: max310x: improve crystal stable clock detection
	x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6
	x86/mm/ident_map: Use gbpages only where full GB page should be mapped.
	ALSA: hda/conexant: Add quirk for SWS JS201D
	nilfs2: fix data corruption in dsync block recovery for small block sizes
	nilfs2: fix hang in nilfs_lookup_dirty_data_buffers()
	nfp: use correct macro for LengthSelect in BAR config
	irqchip/irq-brcmstb-l2: Add write memory barrier before exit
	pmdomain: core: Move the unused cleanup to a _sync initcall
	Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d"
	sched/membarrier: reduce the ability to hammer on sys_membarrier
	nilfs2: fix potential bug in end_buffer_async_write
	lsm: new security_file_ioctl_compat() hook
	netfilter: nf_tables: fix pointer math issue in nft_byteorder_eval()
	Linux 4.19.307

Change-Id: Ib05aec445afe9920e2502bcfce1c52db76e27139
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2024-04-15 10:17:13 +00:00
Al Viro
fabeeafdab fast_dput(): handle underflows gracefully
[ Upstream commit 504e08cebe1d4e1efe25f915234f646e74a364a8 ]

If refcount is less than 1, we should just warn, unlock dentry and
return true, so that the caller doesn't try to do anything else.

Taking care of that leaves the rest of "lockref_put_return() has
failed" case equivalent to "decrement refcount and rejoin the
normal slow path after the point where we grab ->d_lock".

NOTE: lockref_put_return() is strictly a fastpath thing - unlike
the rest of lockref primitives, it does not contain a fallback.
Caller (and it looks like fast_dput() is the only legitimate one
in the entire kernel) has to do that itself.  Reasons for
lockref_put_return() failures:
	* ->d_lock held by somebody
	* refcount <= 0
	* ... or an architecture not supporting lockref use of
cmpxchg - sparc, anything non-SMP, config with spinlock debugging...

We could add a fallback, but it would be a clumsy API - we'd have
to distinguish between:
	(1) refcount > 1 - decremented, lock not held on return
	(2) refcount < 1 - left alone, probably no sense to hold the lock
	(3) refcount is 1, no cmphxcg - decremented, lock held on return
	(4) refcount is 1, cmphxcg supported - decremented, lock *NOT* held
	    on return.
We want to return with no lock held in case (4); that's the whole point of that
thing.  We very much do not want to have the fallback in case (3) return without
a lock, since the caller might have to retake it in that case.
So it wouldn't be more convenient than doing the fallback in the caller and
it would be very easy to screw up, especially since the test coverage would
suck - no way to test (3) and (4) on the same kernel build.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-02-23 08:12:48 +01:00
Eric Biggers
906242d10b fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
commit 0bf3d5c1604ecbbd4e49e9f5b3c79152b87adb0d upstream.

Make __d_move() clear DCACHE_ENCRYPTED_NAME on the source dentry.  This
is needed for when d_splice_alias() moves a directory's encrypted alias
to its decrypted alias as a result of the encryption key being added.

Otherwise, the decrypted alias will incorrectly be invalidated on the
next lookup, causing problems such as unmounting a mount the user just
mount()ed there.

Note that we don't have to support arbitrary moves of this flag because
fscrypt doesn't allow dentries with DCACHE_ENCRYPTED_NAME to be the
source or target of a rename().

Fixes: 28b4c26396 ("ext4 crypto: revalidate dentry after adding or removing the key")
Reported-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-05 11:08:35 +01:00
Srinivasarao P
5ca1f513f7 Merge android-4.19-stable.149 (9ce79d9) into msm-4.19
* refs/heads/tmp-9ce79d9:
  Linux 4.19.149
  KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch
  ata: sata_mv, avoid trigerrable BUG_ON
  ata: make qc_prep return ata_completion_errors
  ata: define AC_ERR_OK
  kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE
  s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl
  mm, THP, swap: fix allocating cluster for swapfile by mistake
  kprobes: Fix to check probe enabled before disarm_kprobe_ftrace()
  s390/dasd: Fix zero write for FBA devices
  tracing: fix double free
  KVM: SVM: Add a dedicated INVD intercept routine
  KVM: x86: Reset MMU context if guest toggles CR4.SMAP or CR4.PKE
  MIPS: Add the missing 'CPU_1074K' into __get_cpu_type()
  regmap: fix page selection for noinc reads
  ALSA: asihpi: fix iounmap in error handler
  bpf: Fix a rcu warning for bpffs map pretty-print
  batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
  batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
  batman-adv: Add missing include for in_interrupt()
  drm/sun4i: sun8i-csc: Secondary CSC register correction
  net: qed: RDMA personality shouldn't fail VF load
  drm/vc4/vc4_hdmi: fill ASoC card owner
  bpf: Fix clobbering of r2 in bpf_gen_ld_abs
  mac802154: tx: fix use-after-free
  batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
  atm: eni: fix the missed pci_disable_device() for eni_init_one()
  batman-adv: bla: fix type misuse for backbone_gw hash indexing
  mwifiex: Increase AES key storage size to 256 bits
  clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init()
  ieee802154/adf7242: check status of adf7242_read_reg
  ieee802154: fix one possible memleak in ca8210_dev_com_init
  objtool: Fix noreturn detection for ignored functions
  i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()
  drm/amdkfd: fix a memory leak issue
  lockdep: fix order in trace_hardirqs_off_caller()
  s390/init: add missing __init annotations
  RISC-V: Take text_mutex in ftrace_init_nop()
  ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN Converter9 2-in-1
  ASoC: wm8994: Ensure the device is resumed in wm89xx_mic_detect functions
  ASoC: wm8994: Skip setting of the WM8994_MICBIAS register for WM1811
  nvme: explicitly update mpath disk capacity on revalidation
  net: openvswitch: use div_u64() for 64-by-32 divisions
  perf parse-events: Use strcmp() to compare the PMU name
  ubi: fastmap: Free unused fastmap anchor peb during detach
  btrfs: qgroup: fix data leak caused by race between writeback and truncate
  vfio/pci: fix racy on error and request eventfd ctx
  selftests/x86/syscall_nt: Clear weird flags after each test
  scsi: libfc: Skip additional kref updating work event
  scsi: libfc: Handling of extra kref
  nvme: fix possible deadlock when I/O is blocked
  cifs: Fix double add page to memcg when cifs_readpages
  vfio/pci: Clear error and request eventfd ctx after releasing
  x86/speculation/mds: Mark mds_user_clear_cpu_buffers() __always_inline
  mtd: parser: cmdline: Support MTD names containing one or more colons
  rapidio: avoid data race between file operation callbacks and mport_cdev_add().
  mm/swap_state: fix a data race in swapin_nr_pages
  ceph: fix potential race in ceph_check_caps
  PCI: tegra: Fix runtime PM imbalance on error
  mtd: rawnand: omap_elm: Fix runtime PM imbalance on error
  wlcore: fix runtime pm imbalance in wlcore_regdomain_config
  wlcore: fix runtime pm imbalance in wl1271_tx_work
  ASoC: img-i2s-out: Fix runtime PM imbalance on error
  perf kcore_copy: Fix module map when there are no modules loaded
  perf metricgroup: Free metric_events on error
  perf util: Fix memory leak of prefix_if_not_in
  perf stat: Fix duration_time value for higher intervals
  perf trace: Fix the selection for architectures to generate the errno name tables
  perf evsel: Fix 2 memory leaks
  vfio/pci: fix memory leaks of eventfd ctx
  btrfs: don't force read-only after error in drop snapshot
  usb: dwc3: Increase timeout for CmdAct cleared by device controller
  printk: handle blank console arguments passed in.
  drm/nouveau/dispnv50: fix runtime pm imbalance on error
  drm/nouveau: fix runtime pm imbalance on error
  drm/nouveau/debugfs: fix runtime pm imbalance on error
  e1000: Do not perform reset in reset_task if we are already down
  arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register
  scsi: cxlflash: Fix error return code in cxlflash_probe()
  USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int
  fuse: don't check refcount after stealing page
  powerpc/traps: Make unrecoverable NMIs die instead of panic
  ALSA: hda: Fix potential race in unsol event handler
  tty: serial: samsung: Correct clock selection logic
  tipc: fix memory leak in service subscripting
  USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe()
  Bluetooth: Handle Inquiry Cancel error after Inquiry Complete
  phy: samsung: s5pv210-usb2: Add delay after reset
  power: supply: max17040: Correct voltage reading
  perf mem2node: Avoid double free related to realloc
  atm: fix a memory leak of vcc->user_back
  dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion
  arm64: cpufeature: Relax checks for AArch32 support at EL[0-2]
  sparc64: vcc: Fix error return code in vcc_probe()
  staging:r8188eu: avoid skb_clone for amsdu to msdu conversion
  scsi: aacraid: Fix error handling paths in aac_probe_one()
  net: openvswitch: use u64 for meter bucket
  KVM: arm64: vgic-its: Fix memory leak on the error path of vgic_add_lpi()
  drivers: char: tlclk.c: Avoid data race between init and interrupt handler
  bdev: Reduce time holding bd_mutex in sync in blkdev_close()
  KVM: Remove CREATE_IRQCHIP/SET_PIT2 race
  serial: uartps: Wait for tx_empty in console setup
  scsi: qedi: Fix termination timeouts in session logout
  mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area
  nvmet-rdma: fix double free of rdma queue
  mm/vmscan.c: fix data races using kswapd_classzone_idx
  mm/filemap.c: clear page error before actual read
  mm/kmemleak.c: use address-of operator on section symbols
  NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()
  PCI: pciehp: Fix MSI interrupt race
  ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor
  ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len
  PCI: Use ioremap(), not phys_to_virt() for platform ROM
  svcrdma: Fix leak of transport addresses
  SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()'
  scsi: hpsa: correct race condition in offload enabled
  RDMA/rxe: Set sys_image_guid to be aligned with HW IB devices
  nvme: Fix controller creation races with teardown flow
  nvme-multipath: do not reset on unknown status
  tools: gpio-hammer: Avoid potential overflow in main
  cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_work_fn
  perf cpumap: Fix snprintf overflow check
  serial: 8250: 8250_omap: Terminate DMA before pushing data on RX timeout
  serial: 8250_omap: Fix sleeping function called from invalid context during probe
  serial: 8250_port: Don't service RX FIFO if throttled
  perf parse-events: Fix 3 use after frees found with clang ASAN
  thermal: rcar_thermal: Handle probe error gracefully
  tracing: Use address-of operator on section symbols
  drm/msm/a5xx: Always set an OPP supported hardware value
  drm/msm: fix leaks if initialization fails
  KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
  RDMA/cm: Remove a race freeing timewait_info
  nfsd: Don't add locks to closed or closing open stateids
  rtc: ds1374: fix possible race condition
  rtc: sa1100: fix possible race condition
  tpm: ibmvtpm: Wait for buffer to be set before proceeding
  ext4: mark block bitmap corrupted when found instead of BUGON
  xfs: mark dir corrupt when lookup-by-hash fails
  xfs: don't ever return a stale pointer from __xfs_dir3_free_read
  media: tda10071: fix unsigned sign extension overflow
  Bluetooth: L2CAP: handle l2cap config request during open state
  scsi: aacraid: Disabling TM path and only processing IOP reset
  ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read
  drm/amd/display: Stop if retimer is not available
  drm/amdgpu: increase atombios cmd timeout
  mm: avoid data corruption on CoW fault into PFN-mapped VMA
  perf jevents: Fix leak of mapfile memory
  ext4: fix a data race at inode->i_disksize
  timekeeping: Prevent 32bit truncation in scale64_check_overflow()
  Bluetooth: guard against controllers sending zero'd events
  media: go7007: Fix URB type for interrupt handling
  bus: hisi_lpc: Fixup IO ports addresses to avoid use-after-free in host removal
  random: fix data races at timer_rand_state
  firmware: arm_sdei: Use cpus_read_lock() to avoid races with cpuhp
  drm/amd/display: dal_ddc_i2c_payloads_create can fail causing panic
  dmaengine: tegra-apb: Prevent race conditions on channel's freeing
  dmaengine: stm32-dma: use vchan_terminate_vdesc() in .terminate_all
  bpf: Remove recursion prevention from rcu free callback
  x86/pkeys: Add check for pkey "overflow"
  media: staging/imx: Missing assignment in imx_media_capture_device_register()
  dmaengine: stm32-mdma: use vchan_terminate_vdesc() in .terminate_all
  KVM: x86: fix incorrect comparison in trace event
  RDMA/rxe: Fix configuration of atomic queue pair attributes
  perf test: Fix test trace+probe_vfs_getname.sh on s390
  ALSA: usb-audio: Don't create a mixer element with bogus volume range
  mt76: clear skb pointers from rx aggregation reorder buffer during cleanup
  crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test
  clk: stratix10: use do_div() for 64-bit calculation
  drm/omap: fix possible object reference leak
  scsi: lpfc: Fix coverity errors in fmdi attribute handling
  scsi: lpfc: Fix RQ buffer leakage when no IOCBs available
  selinux: sel_avc_get_stat_idx should increase position index
  audit: CONFIG_CHANGE don't log internal bookkeeping as an event
  skbuff: fix a data race in skb_queue_len()
  ALSA: hda: Clear RIRB status before reading WP
  KVM: fix overflow of zero page refcount with ksm running
  Bluetooth: prefetch channel before killing sock
  mm: pagewalk: fix termination condition in walk_pte_range()
  mm/swapfile.c: swap_next should increase position index
  Bluetooth: Fix refcount use-after-free issue
  tools/power/x86/intel_pstate_tracer: changes for python 3 compatibility
  selftests/ftrace: fix glob selftest
  ceph: ensure we have a new cap before continuing in fill_inode
  ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter
  ARM: 8948/1: Prevent OOB access in stacktrace
  tracing: Set kernel_stack's caller size properly
  Bluetooth: btrtl: Use kvmalloc for FW allocations
  powerpc/eeh: Only dump stack once if an MMIO loop is detected
  s390/cpum_sf: Use kzalloc and minor changes
  dmaengine: zynqmp_dma: fix burst length configuration
  scsi: ufs: Fix a race condition in the tracing code
  scsi: ufs: Make ufshcd_add_command_trace() easier to read
  ACPI: EC: Reference count query handlers under lock
  sctp: move trace_sctp_probe_path into sctp_outq_sack
  media: ti-vpe: cal: Restrict DMA to avoid memory corruption
  seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier
  ipv6_route_seq_next should increase position index
  rt_cpu_seq_next should increase position index
  neigh_stat_seq_next() should increase position index
  xfs: fix log reservation overflows when allocating large rt extents
  KVM: arm/arm64: vgic: Fix potential double free dist->spis in __kvm_vgic_destroy()
  kernel/sys.c: avoid copying possible padding bytes in copy_to_user
  ASoC: max98090: remove msleep in PLL unlocked workaround
  CIFS: Properly process SMB3 lease breaks
  debugfs: Fix !DEBUG_FS debugfs_create_automount
  scsi: pm80xx: Cleanup command when a reset times out
  gfs2: clean up iopen glock mess in gfs2_create_inode
  mmc: core: Fix size overflow for mmc partitions
  ubi: Fix producing anchor PEBs
  RDMA/iw_cgxb4: Fix an error handling path in 'c4iw_connect()'
  xfs: fix attr leaf header freemap.size underflow
  fix dget_parent() fastpath race
  RDMA/i40iw: Fix potential use after free
  RDMA/qedr: Fix potential use after free
  dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq fails
  bcache: fix a lost wake-up problem caused by mca_cannibalize_lock
  tracing: Adding NULL checks for trace_array descriptor pointer
  tpm_crb: fix fTPM on AMD Zen+ CPUs
  drm/amdgpu/powerplay/smu7: fix AVFS handling with custom powerplay table
  mfd: mfd-core: Protect against NULL call-back function pointer
  mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup()
  drm/amdgpu/powerplay: fix AVFS handling with custom powerplay table
  clk/ti/adpll: allocate room for terminating null
  net: silence data-races on sk_backlog.tail
  scsi: lpfc: Fix kernel crash at lpfc_nvme_info_show during remote port bounce
  scsi: fnic: fix use after free
  PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out
  leds: mlxreg: Fix possible buffer overflow
  lib/string.c: implement stpcpy
  ALSA: hda/realtek: Enable front panel headset LED on Lenovo ThinkStation P520
  ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged
  ALSA: usb-audio: Add delay quirk for H570e USB headsets
  x86/ioapic: Unbreak check_timer()
  arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback
  media: smiapp: Fix error handling at NVM reading
  ASoC: kirkwood: fix IRQ error handling
  gma/gma500: fix a memory disclosure bug due to uninitialized bytes
  m68k: q40: Fix info-leak in rtc_ioctl
  scsi: aacraid: fix illegal IO beyond last LBA
  mm: fix double page fault on arm64 if PTE_AF is cleared
  ath10k: fix memory leak for tpc_stats_final
  ath10k: fix array out-of-bounds access
  dma-fence: Serialise signal enabling (dma_fence_enable_sw_signaling)
  media: mc-device.c: fix memleak in media_device_register_entity
  selinux: allow labeling before policy is loaded
  ANDROID: GKI: prevent removal of monitored symbols
  ANDROID: Refresh ABI.xmls with libabigail 1.8.0-98bbf30d
  Linux 4.19.148
  serial: 8250: Avoid error message on reprobe
  tcp_bbr: adapt cwnd based on ack aggregation estimation
  tcp_bbr: refactor bbr_target_cwnd() for general inflight provisioning
  mm: memcg: fix memcg reclaim soft lockup
  kbuild: support LLVM=1 to switch the default tools to Clang/LLVM
  kbuild: replace AS=clang with LLVM_IAS=1
  kbuild: remove AS variable
  x86/boot: kbuild: allow readelf executable to be specified
  net: wan: wanxl: use $(M68KCC) instead of $(M68KAS) for rebuilding firmware
  net: wan: wanxl: use allow to pass CROSS_COMPILE_M68k for rebuilding firmware
  Documentation/llvm: fix the name of llvm-size
  Documentation/llvm: add documentation on building w/ Clang/LLVM
  kbuild: add OBJSIZE variable for the size tool
  MAINTAINERS: add CLANG/LLVM BUILD SUPPORT info
  ipv4: Update exception handling for multipath routes via same device
  net: add __must_check to skb_put_padto()
  net: qrtr: check skb_put_padto() return value
  net: phy: Avoid NPD upon phy_detach() when driver is unbound
  bnxt_en: Protect bnxt_set_eee() and bnxt_set_pauseparam() with mutex.
  bnxt_en: return proper error codes in bnxt_show_temp
  tipc: use skb_unshare() instead in tipc_buf_append()
  tipc: fix shutdown() of connection oriented socket
  tipc: Fix memory leak in tipc_group_create_member()
  nfp: use correct define to return NONE fec
  net: sch_generic: aviod concurrent reset and enqueue op for lockless qdisc
  net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC
  net: dsa: rtl8366: Properly clear member config
  net: DCB: Validate DCB_ATTR_DCB_BUFFER argument
  ipv6: avoid lockdep issue in fib6_del()
  ip: fix tos reflection in ack and reset packets
  hdlc_ppp: add range checks in ppp_cp_parse_cr()
  geneve: add transport ports in route lookup for geneve
  cxgb4: Fix offset when clearing filter byte counters
  mm/thp: fix __split_huge_pmd_locked() for migration PMD
  kprobes: fix kill kprobe which has been marked as gone
  KVM: fix memory leak in kvm_io_bus_unregister_dev()
  af_key: pfkey_dump needs parameter validation
  ANDROID: drop KERNEL_DIR setting in build.config.common
  Linux 4.19.147
  x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y
  powerpc/dma: Fix dma_map_ops::get_required_mask
  ehci-hcd: Move include to keep CRC stable
  x86/boot/compressed: Disable relocation relaxation
  serial: 8250_pci: Add Realtek 816a and 816b
  Input: i8042 - add Entroware Proteus EL07R4 to nomux and reset lists
  Input: trackpoint - add new trackpoint variant IDs
  percpu: fix first chunk size calculation for populated bitmap
  Revert "ALSA: hda - Fix silent audio output and corrupted input on MSI X570-A PRO"
  i2c: i801: Fix resume bug
  usblp: fix race between disconnect() and read()
  USB: UAS: fix disconnect by unplugging a hub
  USB: quirks: Add USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk for BYD zhaoxin notebook
  drm/mediatek: Add missing put_device() call in mtk_hdmi_dt_parse_pdata()
  drm/mediatek: Add exception handing in mtk_drm_probe() if component init fail
  MIPS: SNI: Fix spurious interrupts
  fbcon: Fix user font detection test at fbcon_resize().
  perf test: Free formats for perf pmu parse test
  MIPS: SNI: Fix MIPS_L1_CACHE_SHIFT
  perf test: Fix the "signal" test inline assembly
  Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload
  ASoC: qcom: Set card->owner to avoid warnings
  clk: rockchip: Fix initialization of mux_pll_src_4plls_p
  clk: davinci: Use the correct size when allocating memory
  KVM: MIPS: Change the definition of kvm type
  spi: Fix memory leak on splited transfers
  i2c: algo: pca: Reapply i2c bus settings after reset
  f2fs: Return EOF on unaligned end of file DIO read
  f2fs: fix indefinite loop scanning for free nid
  nvme-rdma: cancel async events before freeing event struct
  nvme-fc: cancel async events before freeing event struct
  openrisc: Fix cache API compile issue when not inlining
  rapidio: Replace 'select' DMAENGINES 'with depends on'
  SUNRPC: stop printk reading past end of string
  NFS: Zero-stateid SETATTR should first return delegation
  spi: spi-loopback-test: Fix out-of-bounds read
  regulator: pwm: Fix machine constraints application
  scsi: lpfc: Fix FLOGI/PLOGI receive race condition in pt2pt discovery
  scsi: libfc: Fix for double free()
  scsi: pm8001: Fix memleak in pm8001_exec_internal_task_abort
  NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall
  hv_netvsc: Remove "unlikely" from netvsc_select_queue
  net: handle the return value of pskb_carve_frag_list() correctly
  RDMA/bnxt_re: Restrict the max_gids to 256
  gfs2: initialize transaction tr_ailX_lists earlier
  scsi: qla2xxx: Reduce holding sess_lock to prevent CPU lock-up
  scsi: qla2xxx: Move rport registration out of internal work_list
  scsi: qla2xxx: Update rscn_rcvd field to more meaningful scan_needed
  dsa: Allow forwarding of redirected IGMP traffic
  ANDROID: Refresh ABI.xmls with libabigail 1.8.0-1dca710a
  ANDROID: KMI symbol lists: migrate section name

 Conflicts:
	Documentation/devicetree/bindings
	Documentation/devicetree/bindings/sound/wm8994.txt
	Makefile
	drivers/scsi/ufs/ufshcd.c
	drivers/usb/dwc3/gadget.c
	mm/memory.c
	net/qrtr/qrtr.c

Change-Id: I51d2167f5b2aca5ff0e50a5399d6c13b7a9a7e64
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
2020-10-21 09:25:49 +05:30
Greg Kroah-Hartman
9ce79d9bed Merge 4.19.149 into android-4.19-stable
Changes in 4.19.149
	selinux: allow labeling before policy is loaded
	media: mc-device.c: fix memleak in media_device_register_entity
	dma-fence: Serialise signal enabling (dma_fence_enable_sw_signaling)
	ath10k: fix array out-of-bounds access
	ath10k: fix memory leak for tpc_stats_final
	mm: fix double page fault on arm64 if PTE_AF is cleared
	scsi: aacraid: fix illegal IO beyond last LBA
	m68k: q40: Fix info-leak in rtc_ioctl
	gma/gma500: fix a memory disclosure bug due to uninitialized bytes
	ASoC: kirkwood: fix IRQ error handling
	media: smiapp: Fix error handling at NVM reading
	arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback
	x86/ioapic: Unbreak check_timer()
	ALSA: usb-audio: Add delay quirk for H570e USB headsets
	ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged
	ALSA: hda/realtek: Enable front panel headset LED on Lenovo ThinkStation P520
	lib/string.c: implement stpcpy
	leds: mlxreg: Fix possible buffer overflow
	PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out
	scsi: fnic: fix use after free
	scsi: lpfc: Fix kernel crash at lpfc_nvme_info_show during remote port bounce
	net: silence data-races on sk_backlog.tail
	clk/ti/adpll: allocate room for terminating null
	drm/amdgpu/powerplay: fix AVFS handling with custom powerplay table
	mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup()
	mfd: mfd-core: Protect against NULL call-back function pointer
	drm/amdgpu/powerplay/smu7: fix AVFS handling with custom powerplay table
	tpm_crb: fix fTPM on AMD Zen+ CPUs
	tracing: Adding NULL checks for trace_array descriptor pointer
	bcache: fix a lost wake-up problem caused by mca_cannibalize_lock
	dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq fails
	RDMA/qedr: Fix potential use after free
	RDMA/i40iw: Fix potential use after free
	fix dget_parent() fastpath race
	xfs: fix attr leaf header freemap.size underflow
	RDMA/iw_cgxb4: Fix an error handling path in 'c4iw_connect()'
	ubi: Fix producing anchor PEBs
	mmc: core: Fix size overflow for mmc partitions
	gfs2: clean up iopen glock mess in gfs2_create_inode
	scsi: pm80xx: Cleanup command when a reset times out
	debugfs: Fix !DEBUG_FS debugfs_create_automount
	CIFS: Properly process SMB3 lease breaks
	ASoC: max98090: remove msleep in PLL unlocked workaround
	kernel/sys.c: avoid copying possible padding bytes in copy_to_user
	KVM: arm/arm64: vgic: Fix potential double free dist->spis in __kvm_vgic_destroy()
	xfs: fix log reservation overflows when allocating large rt extents
	neigh_stat_seq_next() should increase position index
	rt_cpu_seq_next should increase position index
	ipv6_route_seq_next should increase position index
	seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier
	media: ti-vpe: cal: Restrict DMA to avoid memory corruption
	sctp: move trace_sctp_probe_path into sctp_outq_sack
	ACPI: EC: Reference count query handlers under lock
	scsi: ufs: Make ufshcd_add_command_trace() easier to read
	scsi: ufs: Fix a race condition in the tracing code
	dmaengine: zynqmp_dma: fix burst length configuration
	s390/cpum_sf: Use kzalloc and minor changes
	powerpc/eeh: Only dump stack once if an MMIO loop is detected
	Bluetooth: btrtl: Use kvmalloc for FW allocations
	tracing: Set kernel_stack's caller size properly
	ARM: 8948/1: Prevent OOB access in stacktrace
	ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter
	ceph: ensure we have a new cap before continuing in fill_inode
	selftests/ftrace: fix glob selftest
	tools/power/x86/intel_pstate_tracer: changes for python 3 compatibility
	Bluetooth: Fix refcount use-after-free issue
	mm/swapfile.c: swap_next should increase position index
	mm: pagewalk: fix termination condition in walk_pte_range()
	Bluetooth: prefetch channel before killing sock
	KVM: fix overflow of zero page refcount with ksm running
	ALSA: hda: Clear RIRB status before reading WP
	skbuff: fix a data race in skb_queue_len()
	audit: CONFIG_CHANGE don't log internal bookkeeping as an event
	selinux: sel_avc_get_stat_idx should increase position index
	scsi: lpfc: Fix RQ buffer leakage when no IOCBs available
	scsi: lpfc: Fix coverity errors in fmdi attribute handling
	drm/omap: fix possible object reference leak
	clk: stratix10: use do_div() for 64-bit calculation
	crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test
	mt76: clear skb pointers from rx aggregation reorder buffer during cleanup
	ALSA: usb-audio: Don't create a mixer element with bogus volume range
	perf test: Fix test trace+probe_vfs_getname.sh on s390
	RDMA/rxe: Fix configuration of atomic queue pair attributes
	KVM: x86: fix incorrect comparison in trace event
	dmaengine: stm32-mdma: use vchan_terminate_vdesc() in .terminate_all
	media: staging/imx: Missing assignment in imx_media_capture_device_register()
	x86/pkeys: Add check for pkey "overflow"
	bpf: Remove recursion prevention from rcu free callback
	dmaengine: stm32-dma: use vchan_terminate_vdesc() in .terminate_all
	dmaengine: tegra-apb: Prevent race conditions on channel's freeing
	drm/amd/display: dal_ddc_i2c_payloads_create can fail causing panic
	firmware: arm_sdei: Use cpus_read_lock() to avoid races with cpuhp
	random: fix data races at timer_rand_state
	bus: hisi_lpc: Fixup IO ports addresses to avoid use-after-free in host removal
	media: go7007: Fix URB type for interrupt handling
	Bluetooth: guard against controllers sending zero'd events
	timekeeping: Prevent 32bit truncation in scale64_check_overflow()
	ext4: fix a data race at inode->i_disksize
	perf jevents: Fix leak of mapfile memory
	mm: avoid data corruption on CoW fault into PFN-mapped VMA
	drm/amdgpu: increase atombios cmd timeout
	drm/amd/display: Stop if retimer is not available
	ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read
	scsi: aacraid: Disabling TM path and only processing IOP reset
	Bluetooth: L2CAP: handle l2cap config request during open state
	media: tda10071: fix unsigned sign extension overflow
	xfs: don't ever return a stale pointer from __xfs_dir3_free_read
	xfs: mark dir corrupt when lookup-by-hash fails
	ext4: mark block bitmap corrupted when found instead of BUGON
	tpm: ibmvtpm: Wait for buffer to be set before proceeding
	rtc: sa1100: fix possible race condition
	rtc: ds1374: fix possible race condition
	nfsd: Don't add locks to closed or closing open stateids
	RDMA/cm: Remove a race freeing timewait_info
	KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
	drm/msm: fix leaks if initialization fails
	drm/msm/a5xx: Always set an OPP supported hardware value
	tracing: Use address-of operator on section symbols
	thermal: rcar_thermal: Handle probe error gracefully
	perf parse-events: Fix 3 use after frees found with clang ASAN
	serial: 8250_port: Don't service RX FIFO if throttled
	serial: 8250_omap: Fix sleeping function called from invalid context during probe
	serial: 8250: 8250_omap: Terminate DMA before pushing data on RX timeout
	perf cpumap: Fix snprintf overflow check
	cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_work_fn
	tools: gpio-hammer: Avoid potential overflow in main
	nvme-multipath: do not reset on unknown status
	nvme: Fix controller creation races with teardown flow
	RDMA/rxe: Set sys_image_guid to be aligned with HW IB devices
	scsi: hpsa: correct race condition in offload enabled
	SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()'
	svcrdma: Fix leak of transport addresses
	PCI: Use ioremap(), not phys_to_virt() for platform ROM
	ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len
	ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor
	PCI: pciehp: Fix MSI interrupt race
	NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()
	mm/kmemleak.c: use address-of operator on section symbols
	mm/filemap.c: clear page error before actual read
	mm/vmscan.c: fix data races using kswapd_classzone_idx
	nvmet-rdma: fix double free of rdma queue
	mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area
	scsi: qedi: Fix termination timeouts in session logout
	serial: uartps: Wait for tx_empty in console setup
	KVM: Remove CREATE_IRQCHIP/SET_PIT2 race
	bdev: Reduce time holding bd_mutex in sync in blkdev_close()
	drivers: char: tlclk.c: Avoid data race between init and interrupt handler
	KVM: arm64: vgic-its: Fix memory leak on the error path of vgic_add_lpi()
	net: openvswitch: use u64 for meter bucket
	scsi: aacraid: Fix error handling paths in aac_probe_one()
	staging:r8188eu: avoid skb_clone for amsdu to msdu conversion
	sparc64: vcc: Fix error return code in vcc_probe()
	arm64: cpufeature: Relax checks for AArch32 support at EL[0-2]
	dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion
	atm: fix a memory leak of vcc->user_back
	perf mem2node: Avoid double free related to realloc
	power: supply: max17040: Correct voltage reading
	phy: samsung: s5pv210-usb2: Add delay after reset
	Bluetooth: Handle Inquiry Cancel error after Inquiry Complete
	USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe()
	tipc: fix memory leak in service subscripting
	tty: serial: samsung: Correct clock selection logic
	ALSA: hda: Fix potential race in unsol event handler
	powerpc/traps: Make unrecoverable NMIs die instead of panic
	fuse: don't check refcount after stealing page
	USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int
	scsi: cxlflash: Fix error return code in cxlflash_probe()
	arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register
	e1000: Do not perform reset in reset_task if we are already down
	drm/nouveau/debugfs: fix runtime pm imbalance on error
	drm/nouveau: fix runtime pm imbalance on error
	drm/nouveau/dispnv50: fix runtime pm imbalance on error
	printk: handle blank console arguments passed in.
	usb: dwc3: Increase timeout for CmdAct cleared by device controller
	btrfs: don't force read-only after error in drop snapshot
	vfio/pci: fix memory leaks of eventfd ctx
	perf evsel: Fix 2 memory leaks
	perf trace: Fix the selection for architectures to generate the errno name tables
	perf stat: Fix duration_time value for higher intervals
	perf util: Fix memory leak of prefix_if_not_in
	perf metricgroup: Free metric_events on error
	perf kcore_copy: Fix module map when there are no modules loaded
	ASoC: img-i2s-out: Fix runtime PM imbalance on error
	wlcore: fix runtime pm imbalance in wl1271_tx_work
	wlcore: fix runtime pm imbalance in wlcore_regdomain_config
	mtd: rawnand: omap_elm: Fix runtime PM imbalance on error
	PCI: tegra: Fix runtime PM imbalance on error
	ceph: fix potential race in ceph_check_caps
	mm/swap_state: fix a data race in swapin_nr_pages
	rapidio: avoid data race between file operation callbacks and mport_cdev_add().
	mtd: parser: cmdline: Support MTD names containing one or more colons
	x86/speculation/mds: Mark mds_user_clear_cpu_buffers() __always_inline
	vfio/pci: Clear error and request eventfd ctx after releasing
	cifs: Fix double add page to memcg when cifs_readpages
	nvme: fix possible deadlock when I/O is blocked
	scsi: libfc: Handling of extra kref
	scsi: libfc: Skip additional kref updating work event
	selftests/x86/syscall_nt: Clear weird flags after each test
	vfio/pci: fix racy on error and request eventfd ctx
	btrfs: qgroup: fix data leak caused by race between writeback and truncate
	ubi: fastmap: Free unused fastmap anchor peb during detach
	perf parse-events: Use strcmp() to compare the PMU name
	net: openvswitch: use div_u64() for 64-by-32 divisions
	nvme: explicitly update mpath disk capacity on revalidation
	ASoC: wm8994: Skip setting of the WM8994_MICBIAS register for WM1811
	ASoC: wm8994: Ensure the device is resumed in wm89xx_mic_detect functions
	ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN Converter9 2-in-1
	RISC-V: Take text_mutex in ftrace_init_nop()
	s390/init: add missing __init annotations
	lockdep: fix order in trace_hardirqs_off_caller()
	drm/amdkfd: fix a memory leak issue
	i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()
	objtool: Fix noreturn detection for ignored functions
	ieee802154: fix one possible memleak in ca8210_dev_com_init
	ieee802154/adf7242: check status of adf7242_read_reg
	clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init()
	mwifiex: Increase AES key storage size to 256 bits
	batman-adv: bla: fix type misuse for backbone_gw hash indexing
	atm: eni: fix the missed pci_disable_device() for eni_init_one()
	batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
	mac802154: tx: fix use-after-free
	bpf: Fix clobbering of r2 in bpf_gen_ld_abs
	drm/vc4/vc4_hdmi: fill ASoC card owner
	net: qed: RDMA personality shouldn't fail VF load
	drm/sun4i: sun8i-csc: Secondary CSC register correction
	batman-adv: Add missing include for in_interrupt()
	batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
	batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
	bpf: Fix a rcu warning for bpffs map pretty-print
	ALSA: asihpi: fix iounmap in error handler
	regmap: fix page selection for noinc reads
	MIPS: Add the missing 'CPU_1074K' into __get_cpu_type()
	KVM: x86: Reset MMU context if guest toggles CR4.SMAP or CR4.PKE
	KVM: SVM: Add a dedicated INVD intercept routine
	tracing: fix double free
	s390/dasd: Fix zero write for FBA devices
	kprobes: Fix to check probe enabled before disarm_kprobe_ftrace()
	mm, THP, swap: fix allocating cluster for swapfile by mistake
	s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl
	kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE
	ata: define AC_ERR_OK
	ata: make qc_prep return ata_completion_errors
	ata: sata_mv, avoid trigerrable BUG_ON
	KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch
	Linux 4.19.149

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idfc1b35ec63b4b464aeb6e32709102bee0efc872
2020-10-01 16:49:05 +02:00
Al Viro
98e151baab fix dget_parent() fastpath race
[ Upstream commit e84009336711d2bba885fc9cea66348ddfce3758 ]

We are overoptimistic about taking the fast path there; seeing
the same value in ->d_parent after having grabbed a reference
to that parent does *not* mean that it has remained our parent
all along.

That wouldn't be a big deal (in the end it is our parent and
we have grabbed the reference we are about to return), but...
the situation with barriers is messed up.

We might have hit the following sequence:

d is a dentry of /tmp/a/b
CPU1:					CPU2:
parent = d->d_parent (i.e. dentry of /tmp/a)
					rename /tmp/a/b to /tmp/b
					rmdir /tmp/a, making its dentry negative
grab reference to parent,
end up with cached parent->d_inode (NULL)
					mkdir /tmp/a, rename /tmp/b to /tmp/a/b
recheck d->d_parent, which is back to original
decide that everything's fine and return the reference we'd got.

The trouble is, caller (on CPU1) will observe dget_parent()
returning an apparently negative dentry.  It actually is positive,
but CPU1 has stale ->d_inode cached.

Use d->d_seq to see if it has been moved instead of rechecking ->d_parent.
NOTE: we are *NOT* going to retry on any kind of ->d_seq mismatch;
we just go into the slow path in such case.  We don't wait for ->d_seq
to become even either - again, if we are racing with renames, we
can bloody well go to slow path anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:14:27 +02:00
Ivaylo Georgiev
4c30d46517 Merge android-4.19.95 (5da1114) into msm-4.19
* refs/heads/tmp-5da1114:
  Revert crypto changes from android-4.19.79-95
  Revert "UPSTREAM: PM / wakeup updates"
  Revert "ANDROID: of: property: Enable of_devlink by default"
  Revert "UPSTREAM: dt-bindings: arm: coresight: Add support for coresight-loses-context-with-cpu"
  UPSTREAM: net: usbnet: Fix -Wcast-function-type
  UPSTREAM: USB: dummy-hcd: use usb_urb_dir_in instead of usb_pipein
  UPSTREAM: USB: dummy-hcd: increase max number of devices to 32
  ANDROID: tty: serdev: Fix broken serial console input
  ANDROID: update kernel ABI (perf_event changes)
  BACKPORT: perf_event: Add support for LSM and SELinux checks
  UPSTREAM: iommu: Allow io-pgtable to be used outside of drivers/iommu/
  ANDROID: update abi for 4.19.94 release
  ANDROID: update abi due to revert
  Revert "BACKPORT: perf_event: Add support for LSM and SELinux checks"
  UPSTREAM: selinux: sidtab reverse lookup hash table
  UPSTREAM: selinux: avoid atomic_t usage in sidtab
  UPSTREAM: selinux: check sidtab limit before adding a new entry
  UPSTREAM: selinux: fix context string corruption in convert_context()
  UPSTREAM: selinux: overhaul sidtab to fix bug and improve performance
  UPSTREAM: selinux: refactor mls_context_to_sid() and make it stricter
  UPSTREAM: selinux: use separate table for initial SID lookup
  UPSTREAM: selinux: make "selinux_policycap_names[]" const char *
  UPSTREAM: selinux: refactor sidtab conversion
  ANDROID: Update ABI representation
  ANDROID: GKI: clk: Don't disable unused clocks with sync state support
  ANDROID: GKI: clk: Add support for clock providers with sync state
  ANDROID: GKI: driver core: Add dev_has_sync_state()
  ANDROID: update kernel ABI representation
  BACKPORT: perf_event: Add support for LSM and SELinux checks
  ANDROID: update ABI representation
  UPSTREAM: exit: panic before exit_mm() on global init exit
  ANDROID: serdev: Fix platform device support
  ANDROID: Kconfig.gki: Add Hidden SPRD DRM configs
  ANDROID: gki_defconfig: Disable TRANSPARENT_HUGEPAGE
  ANDROID: gki_defconfig: Enable CONFIG_GNSS_CMDLINE_SERIAL
  ANDROID: gnss: Add command line test driver
  ANDROID: serdev: add platform device support
  ANDROID: gki_defconfig: enable ARM64_SW_TTBR0_PAN
  ANDROID: gki_defconfig: Set BINFMT_MISC as =m
  UPSTREAM: binder: fix incorrect calculation for num_valid
  ABI: Update ABI after f2fs merge
  ANDROID: add initial ABI whitelist for android-4.19
  ANDROID: staging: android: ion: Fix build when CONFIG_ION_SYSTEM_HEAP=n
  ANDROID: staging: android: ion: Expose total heap and pool sizes via sysfs
  ANDROID: Update ABI representation due to vmstat counter changes
  UPSTREAM: include/linux/slab.h: fix sparse warning in kmalloc_type()
  UPSTREAM: mm, slab: shorten kmalloc cache names for large sizes
  UPSTREAM: mm, proc: add KReclaimable to /proc/meminfo
  UPSTREAM: mm: rename and change semantics of nr_indirectly_reclaimable_bytes
  UPSTREAM: dcache: allocate external names from reclaimable kmalloc caches
  UPSTREAM: mm, slab/slub: introduce kmalloc-reclaimable caches
  UPSTREAM: mm, slab: combine kmalloc_caches and kmalloc_dma_caches
  ANDROID: abi update for 4.19.89
  ANDROID: update abi_gki_aarch64.xml for LTO, CFI, and SCS
  ANDROID: gki_defconfig: enable LTO, CFI, and SCS
  ANDROID: update abi_gki_aarch64.xml for CONFIG_GNSS
  ANDROID: cuttlefish_defconfig: Enable CONFIG_GNSS
  UPSTREAM: arm64: Validate tagged addresses in access_ok() called from kernel threads
  ANDROID: mm: Throttle rss_stat tracepoint
  UPSTREAM: mm: slub: really fix slab walking for init_on_free
  ANDROID: update abi_gki_aarch64.xml for nf change
  ANDROID: kbuild: limit LTO inlining
  ANDROID: kbuild: merge module sections with LTO
  ANDROID: netfilter: nf_nat: remove static from nf_nat_ipv4_fn
  UPSTREAM: drm/client: remove the exporting of drm_client_close
  ANDROID: f2fs: fix possible merge of unencrypted with encrypted I/O
  UPSTREAM: binder: Add binder_proc logging to binderfs
  UPSTREAM: binder: Make transaction_log available in binderfs
  UPSTREAM: binder: Add stats, state and transactions files
  UPSTREAM: binder: add a mount option to show global stats
  UPSTREAM: binder: Validate the default binderfs device names.
  UPSTREAM: binder: Add default binder devices through binderfs when configured
  UPSTREAM: binder: fix CONFIG_ANDROID_BINDER_DEVICES
  UPSTREAM: android: binder: use kstrdup instead of open-coding it
  UPSTREAM: binderfs: remove separate device_initcall()
  UPSTREAM: binderfs: respect limit on binder control creation
  UPSTREAM: binderfs: switch from d_add() to d_instantiate()
  UPSTREAM: binderfs: drop lock in binderfs_binder_ctl_create
  UPSTREAM: binderfs: kill_litter_super() before cleanup
  UPSTREAM: binderfs: rework binderfs_binder_device_create()
  UPSTREAM: binderfs: rework binderfs_fill_super()
  UPSTREAM: binderfs: prevent renaming the control dentry
  UPSTREAM: binderfs: remove outdated comment
  UPSTREAM: binderfs: fix error return code in binderfs_fill_super()
  UPSTREAM: binderfs: handle !CONFIG_IPC_NS builds
  UPSTREAM: binderfs: reserve devices for initial mount
  UPSTREAM: binderfs: rename header to binderfs.h
  UPSTREAM: binderfs: implement "max" mount option
  UPSTREAM: binderfs: make each binderfs mount a new instance
  UPSTREAM: binderfs: remove wrong kern_mount() call
  UPSTREAM: binder: implement binderfs
  UPSTREAM: binder: remove BINDER_DEBUG_ENTRY()
  ANDROID: Don't base allmodconfig on gki_defconfig
  ANDROID: Disable UNWINDER_ORC for allmodconfig
  ANDROID: update abi_gki_aarch64.xml for 4.19.87
  BACKPORT: ARM: 8905/1: Emit __gnu_mcount_nc when using Clang 10.0.0 or newer
  ANDROID: update abi_gki_aarch64.xml
  ANDROID: gki_defconfig: =m's applied for virtio configs in arm64
  UPSTREAM: of: property: Add device link support for interrupt-parent, dmas and -gpio(s)
  UPSTREAM: of: property: Add device link support for "iommu-map"
  UPSTREAM: of: property: Fix the semantics of of_is_ancestor_of()
  UPSTREAM: i2c: of: Populate fwnode in of_i2c_get_board_info()
  UPSTREAM: driver core: Clarify documentation for fwnode_operations.add_links()
  UPSTREAM: dt-bindings: arm: coresight: Add support for coresight-loses-context-with-cpu
  BACKPORT: coresight: etm4x: Save/restore state across CPU low power states
  ANDROID: Update ABI representation
  ANDROID: gki_defconfig: IIO=y
  f2fs: stop GC when the victim becomes fully valid
  f2fs: expose main_blkaddr in sysfs
  f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()
  f2fs: Fix deadlock in f2fs_gc() context during atomic files handling
  f2fs: show f2fs instance in printk_ratelimited
  f2fs: fix potential overflow
  f2fs: fix to update dir's i_pino during cross_rename
  f2fs: support aligned pinned file
  f2fs: avoid kernel panic on corruption test
  f2fs: fix wrong description in document
  f2fs: cache global IPU bio
  f2fs: fix to avoid memory leakage in f2fs_listxattr
  f2fs: check total_segments from devices in raw_super
  f2fs: update multi-dev metadata in resize_fs
  f2fs: mark recovery flag correctly in read_raw_super_block()
  f2fs: fix to update time in lazytime mode
  vfs: don't allow writes to swap files
  mm: set S_SWAPFILE on blockdev swap devices
  BACKPORT: ARM: 8900/1: UNWINDER_FRAME_POINTER implementation for Clang
  ANDROID: update abi_gki_aarch64.xml for 4.19.87
  ANDROID: gki_defconfig: FW_CACHE to no
  FROMGIT: firmware_class: make firmware caching configurable
  FROMLIST: arm64: implement Shadow Call Stack
  FROMLIST: arm64: disable SCS for hypervisor code
  BACKPORT: FROMLIST: arm64: vdso: disable Shadow Call Stack
  FROMLIST: arm64: efi: restore x18 if it was corrupted
  FROMLIST: arm64: preserve x18 when CPU is suspended
  FROMLIST: arm64: reserve x18 from general allocation with SCS
  FROMLIST: arm64: disable function graph tracing with SCS
  FROMLIST: scs: add support for stack usage debugging
  FROMLIST: scs: add accounting
  FROMLIST: add support for Clang's Shadow Call Stack (SCS)
  FROMLIST: arm64: kernel: avoid x18 in __cpu_soft_restart
  FROMLIST: arm64: kvm: stop treating register x18 as caller save
  FROMLIST: arm64/lib: copy_page: avoid x18 register in assembler code
  FROMLIST: arm64: mm: avoid x18 in idmap_kpti_install_ng_mappings
  ANDROID: use non-canonical CFI jump tables
  ANDROID: arm64: add __nocfi to __apply_alternatives
  ANDROID: arm64: add __pa_function
  ANDROID: arm64: allow ThinLTO to be selected
  ANDROID: soc/tegra: disable ARCH_TEGRA_210_SOC with LTO
  FROMLIST: arm64: fix alternatives with LLVM's integrated assembler
  ANDROID: irqchip/gic-v3: rename gic_of_init to work around a ThinLTO+CFI bug
  ANDROID: init: ensure initcall ordering with LTO
  Revert "ANDROID: init: ensure initcall ordering with LTO"
  ANDROID: add support for ThinLTO
  ANDROID: clang: update to 10.0.1
  ANDROID: gki_defconfig: enable CONFIG_REGULATOR_FIXED_VOLTAGE
  ANDROID: gki_defconfig: removed CONFIG_PM_WAKELOCKS
  ANDROID: gki_defconfig: enable CONFIG_IKHEADERS as m
  FROMGIT: pinctrl: devicetree: Avoid taking direct reference to device name string
  ANDROID: update abi_gki_aarch64.xml for 4.19.86 update
  ANDROID: Update ABI representation
  ANDROID: gki_defconfig: disable FUNCTION_TRACER
  ANDROID: Update the ABI representation
  ANDROID: update ABI representation
  ANDROID: add unstripped modules to the distribution
  FROMLIST: vsprintf: Inline call to ptr_to_hashval
  UPSTREAM: rss_stat: Add support to detect RSS updates of external mm
  UPSTREAM: mm: emit tracepoint when RSS changes
  FROMGIT: driver core: Allow device link operations inside sync_state()
  ANDROID: uid_sys_stats: avoid double accounting of dying threads
  ANDROID: scsi: ufs-qcom: Enable BROKEN_CRYPTO quirk flag
  ANDROID: scsi: ufs-hisi: Enable BROKEN_CRYPTO quirk flag
  ANDROID: scsi: ufs: Add quirk bit for controllers that don't play well with inline crypto
  ANDROID: scsi: ufs: UFS init should not require inline crypto
  ANDROID: scsi: ufs: UFS crypto variant operations API
  ANDROID: gki_defconfig: enable inline encryption
  BACKPORT: FROMLIST: ext4: add inline encryption support
  BACKPORT: FROMLIST: f2fs: add inline encryption support
  BACKPORT: FROMLIST: fscrypt: add inline encryption support
  BACKPORT: FROMLIST: scsi: ufs: Add inline encryption support to UFS
  BACKPORT: FROMLIST: scsi: ufs: UFS crypto API
  BACKPORT: FROMLIST: scsi: ufs: UFS driver v2.1 spec crypto additions
  BACKPORT: FROMLIST: block: blk-crypto for Inline Encryption
  ANDROID: block: Fix bio_crypt_should_process WARN_ON
  BACKPORT: FROMLIST: block: Add encryption context to struct bio
  BACKPORT: FROMLIST: block: Keyslot Manager for Inline Encryption
  FROMLIST: f2fs: add support for IV_INO_LBLK_64 encryption policies
  FROMLIST: ext4: add support for IV_INO_LBLK_64 encryption policies
  BACKPORT: FROMLIST: fscrypt: add support for IV_INO_LBLK_64 policies
  FROMLIST: fscrypt: zeroize fscrypt_info before freeing
  FROMLIST: fscrypt: remove struct fscrypt_ctx
  BACKPORT: FROMLIST: fscrypt: invoke crypto API for ESSIV handling
  ANDROID: build kernels with llvm-nm and llvm-objcopy
  ANDROID: Fix allmodconfig build with CC=clang
  UPSTREAM: mm/page_poison: expose page_poisoning_enabled to kernel modules
  FROMGIT: of: property: Add device link support for iommus, mboxes and io-channels
  FROMGIT: of: property: Make it easy to add device links from DT properties
  FROMGIT: of: property: Minor style clean up of of_link_to_phandle()
  Revert "ANDROID: of/property: Add device link support for iommus"
  ANDROID: Add allmodconfig build.configs for x86_64 and aarch64
  ANDROID: fix allmodconfig build
  ANDROID: nf: IDLETIMER: Fix possible use before initialization in idletimer_resume
  BACKPORT: coresight: funnel: Support static funnel
  BACKPORT:FROMGIT: coresight: replicator: Fix missing spin_lock_init()
  BACKPORT:FROMGIT: coresight: funnel: Fix missing spin_lock_init()
  BACKPORT:FROMGIT: coresight: Serialize enabling/disabling a link device.
  UPSTREAM: coresight: tmc-etr: Add barrier packets when moving offset forward
  UPSTREAM: coresight: tmc-etr: Decouple buffer sync and barrier packet insertion
  UPSTREAM: coresight: tmc: Make memory width mask computation into a function
  UPSTREAM: coresight: tmc-etr: Fix perf_data check
  UPSTREAM: coresight: tmc-etr: Fix updating buffer in not-snapshot mode.
  UPSTREAM: coresight: tmc-etr: Check if non-secure access is enabled
  UPSTREAM: coresight: tmc-etr: Handle memory errors
  BACKPORT: coresight: etr_buf: Consolidate refcount initialization
  UPSTREAM: coresight: Fix DEBUG_LOCKS_WARN_ON for uninitialized attribute
  UPSTREAM: coresight: Use coresight device names for sinks in PMU attribute
  UPSTREAM: coresight: tmc-etr: alloc_perf_buf: Do not call smp_processor_id from preemptible
  UPSTREAM: coresight: tmc-etr: Do not call smp_processor_id() from preemptible
  UPSTREAM: coresight: perf: Don't set the truncated flag in snapshot mode
  UPSTREAM: coresight: tmc-etf: Fix snapshot mode update function
  UPSTREAM: coresight: tmc-etr: Properly set AUX buffer head in snapshot mode
  UPSTREAM: coresight: tmc-etr: Add support for CPU-wide trace scenarios
  UPSTREAM: coresight: tmc-etr: Allocate and free ETR memory buffers for CPU-wide scenarios
  UPSTREAM: coresight: tmc-etr: Introduce the notion of IDR to ETR devices
  UPSTREAM: coresight: tmc-etr: Introduce the notion of reference counting to ETR devices
  UPSTREAM: coresight: tmc-etr: Introduce the notion of process ID to ETR devices
  UPSTREAM: coresight: tmc-etr: Create per-thread buffer allocation function
  UPSTREAM: coresight: tmc-etr: Refactor function tmc_etr_setup_perf_buf()
  UPSTREAM: coresight: Communicate perf event to sink buffer allocation functions
  UPSTREAM: coresight: perf: Refactor function free_event_data()
  UPSTREAM: coresight: perf: Clean up function etm_setup_aux()
  UPSTREAM: coresight: Properly address concurrency in sink::update() functions
  UPSTREAM: coresight: Properly address errors in sink::disable() functions
  UPSTREAM: coresight: Move reference counting inside sink drivers
  UPSTREAM: coresight: Adding return code to sink::disable() operation
  UPSTREAM: coresight: etm4x: Configure tracers to emit timestamps
  UPSTREAM: coresight: etm4x: Skip selector pair 0
  UPSTREAM: coresight: etm4x: Add kernel configuration for CONTEXTID
  UPSTREAM: coresight: pmu: Adding ITRACE property to cs_etm PMU
  UPSTREAM: coresight: tmc: Cleanup power management
  UPSTREAM: coresight: Fix freeing up the coresight connections
  UPSTREAM: coresight: tmc: Report DMA setup failures
  UPSTREAM: coresight: catu: fix clang build warning
  UPSTREAM: perf/core: Fix the address filtering fix
  UPSTREAM: perf, pt, coresight: Fix address filters for vmas with non-zero offset
  UPSTREAM: perf: Copy parent's address filter offsets on clone
  UPSTREAM: coresight: Use event attributes for sink selection
  UPSTREAM: coresight: perf: Add "sinks" group to PMU directory
  UPSTREAM: coresight: etb10: Add support for CLAIM tag
  UPSTREAM: coreisght: tmc: Claim device before use
  UPSTREAM: coresight: dynamic-replicator: Claim device for use
  UPSTREAM: coresight: funnel: Claim devices before use
  UPSTREAM: coresight: etmx: Claim devices before use
  UPSTREAM: coresight: Add support for CLAIM tag protocol
  UPSTREAM: coresight: dynamic-replicator: Handle multiple connections
  UPSTREAM: coresight: etb10: Handle errors enabling the device
  UPSTREAM: coresight: etm3: Add support for handling errors
  UPSTREAM: coresight: etm4x: Add support for handling errors
  UPSTREAM: coresight: tmc-etb/etf: Prepare to handle errors enabling
  UPSTREAM: coresight: tmc-etr: Handle errors enabling CATU
  UPSTREAM: coresight: tmc-etr: Refactor for handling errors
  UPSTREAM: coresight: Handle failures in enabling a trace path
  UPSTREAM: coresight: tmc: Fix byte-address alignment for RRP
  UPSTREAM: coresight: etm4x: Configure EL2 exception level when kernel is running in HYP
  UPSTREAM: coresight: etb10: Splitting function etb_enable()
  UPSTREAM: coresight: etb10: Refactor etb_drvdata::mode handling
  UPSTREAM: coresight: etm-perf: Add support for ETR backend
  UPSTREAM: coresight: perf: Remove set_buffer call back
  UPSTREAM: coresight: perf: Add helper to retrieve sink configuration
  UPSTREAM: coresight: perf: Remove reset_buffer call back for sinks
  UPSTREAM: coresight: Convert driver messages to dev_dbg
  UPSTREAM: coresight: tmc-etr: Relax collection of trace from sysfs mode
  UPSTREAM: coresight: tmc-etr: Handle driver mode specific ETR buffers
  UPSTREAM: coresight: perf: Disable trace path upon source error
  UPSTREAM: coresight: perf: Allow tracing on hotplugged CPUs
  UPSTREAM: coresight: perf: Avoid unncessary CPU hotplug read lock
  UPSTREAM: coresight: perf: Fix per cpu path management
  UPSTREAM: coresight: Fix handling of sinks
  UPSTREAM: coresight: Use ERR_CAST instead of ERR_PTR
  UPSTREAM: coresight: Fix remote endpoint parsing
  UPSTREAM: coresight: platform: Fix leaking device reference
  UPSTREAM: coresight: platform: Fix refcounting for graph nodes
  UPSTREAM: coresight: platform: Refactor graph endpoint parsing
  UPSTREAM: coresight: Document error handling in coresight_register
  ANDROID: regression introduced override_creds=off
  ANDROID: overlayfs: internal getxattr operations without sepolicy checking
  ANDROID: overlayfs: add __get xattr method
  ANDROID: Add optional __get xattr method paired to __vfs_getxattr
  UPSTREAM: scsi: ufs: override auto suspend tunables for ufs
  UPSTREAM: scsi: core: allow auto suspend override by low-level driver
  FROMGIT: of: property: Skip adding device links to suppliers that aren't devices
  ANDROID: gki_defconfig: enable CONFIG_KEYBOARD_GPIO
  UPSTREAM: dm bufio: introduce a global cache replacement
  UPSTREAM: dm bufio: remove old-style buffer cleanup
  UPSTREAM: dm bufio: introduce a global queue
  UPSTREAM: dm bufio: refactor adjust_total_allocated
  UPSTREAM: dm bufio: call adjust_total_allocated from __link_buffer and __unlink_buffer
  ANDROID: dummy_cpufreq: Implement get()
  ANDROID: gki_defconfig: enable CONFIG_CPUSETS
  ANDROID: virtio: virtio_input: Set the amount of multitouch slots in virtio input
  rtlwifi: Fix potential overflow on P2P code
  ANDROID: cpufreq: create dummy cpufreq driver
  ANDROID: Allow DRM_IOCTL_MODE_*_DUMB for render clients.
  Cuttlefish Wifi: Add data ops in virt_wifi driver for scan data simulation
  ANDROID: of: property: Enable of_devlink by default
  ANDROID: of: property: Make sure child dependencies don't block probing of parent
  ANDROID: driver core: Allow fwnode_operations.add_links to differentiate errors
  ANDROID: driver core: Allow a device to wait on optional suppliers
  ANDROID: driver core: Add device link support for SYNC_STATE_ONLY flag
  FROMGIT: docs: driver-model: Add documentation for sync_state
  FROMGIT: driver: core: Improve documentation for fwnode_operations.add_links()
  FROMGIT: of: property: Minor code formatting/style clean ups
  ANDROID: of/property: Add device link support for iommus
  ANDROID: move up spin_unlock_bh() ahead of remove_proc_entry()
  BACKPORT: arm64: tags: Preserve tags for addresses translated via TTBR1
  UPSTREAM: arm64: memory: Implement __tag_set() as common function
  UPSTREAM: arm64/mm: fix variable 'tag' set but not used
  UPSTREAM: arm64: avoid clang warning about self-assignment
  ANDROID: sdcardfs: evict dentries on fscrypt key removal
  ANDROID: fscrypt: add key removal notifier chain
  ANDROID: refactor build.config files to remove duplication
  ANDROID: Move from clang r353983c to r365631c
  ANDROID: gki_defconfig: remove PWRSEQ_EMMC and PWRSEQ_SIMPLE
  ANDROID: unconditionally compile sig_ok in struct module
  ANDROID: gki_defconfig: enable fs-verity
  UPSTREAM: mm: vmalloc: show number of vmalloc pages in /proc/meminfo
  BACKPORT: PM/sleep: Expose suspend stats in sysfs
  UPSTREAM: power: supply: Init device wakeup after device_add()
  UPSTREAM: PM / wakeup: Unexport wakeup_source_sysfs_{add,remove}()
  UPSTREAM: PM / wakeup: Register wakeup class kobj after device is added
  UPSTREAM: PM / wakeup: Fix sysfs registration error path
  UPSTREAM: PM / wakeup: Show wakeup sources stats in sysfs
  UPSTREAM: PM / wakeup: Use wakeup_source_register() in wakelock.c
  UPSTREAM: PM / wakeup: Drop wakeup_source_init(), wakeup_source_prepare()
  UPSTREAM: PM / wakeup: Drop wakeup_source_drop()
  UPSTREAM: PM / core: Add support to skip power management in device/driver model
  gki_defconfig: Enable CONFIG_DM_SNAPSHOT
  ANDROID: gki_defconfig: enable accelerated AES and SHA-256
  ANDROID: fix overflow in /proc/uid_cputime/remove_uid_range
  ANDROID: kasan: fix has_attribute check on older GCC versions
  ANDROID: gki_defconfig: enable CONFIG_PARAVIRT and CONFIG_HYPERVISOR_GUEST
  ANDROID: gki_defconfig: enable CONFIG_NLS_*
  ANDROID: gki_defconfig: Enable BPF_JIT and BPF_JIT_ALWAYS_ON
  FROMGIT: of: property: Create device links for all child-supplier depencencies
  FROMGIT: of/platform: Pause/resume sync state during init and of_platform_populate()
  BACKPORT: FROMGIT: driver core: Add sync_state driver/bus callback
  BACKPORT: FROMGIT: of: property: Add functional dependency link from DT bindings
  FROMGIT: driver core: Add support for linking devices during device addition
  FROMGIT: driver core: Add fwnode_to_dev() to look up device from fwnode
  UPSTREAM: mm: untag user pointers in mmap/munmap/mremap/brk
  UPSTREAM: vfio/type1: untag user pointers in vaddr_get_pfn
  UPSTREAM: tee/shm: untag user pointers in tee_shm_register
  UPSTREAM: media/v4l2-core: untag user pointers in videobuf_dma_contig_user_get
  UPSTREAM: drm/radeon: untag user pointers in radeon_gem_userptr_ioctl
  BACKPORT: drm/amdgpu: untag user pointers
  UPSTREAM: userfaultfd: untag user pointers
  UPSTREAM: fs/namespace: untag user pointers in copy_mount_options
  UPSTREAM: mm: untag user pointers in get_vaddr_frames
  UPSTREAM: mm: untag user pointers in mm/gup.c
  UPSTREAM: mm: untag user pointers passed to memory syscalls
  BACKPORT: lib: untag user pointers in strn*_user
  UPSTREAM: arm64: Fix reference to docs for ARM64_TAGGED_ADDR_ABI
  UPSTREAM: selftests, arm64: add kernel headers path for tags_test
  BACKPORT: arm64: Relax Documentation/arm64/tagged-pointers.rst
  UPSTREAM: arm64: Define Documentation/arm64/tagged-address-abi.rst
  UPSTREAM: arm64: Change the tagged_addr sysctl control semantics to only prevent the opt-in
  UPSTREAM: arm64: Tighten the PR_{SET, GET}_TAGGED_ADDR_CTRL prctl() unused arguments
  UPSTREAM: selftests, arm64: fix uninitialized symbol in tags_test.c
  UPSTREAM: arm64: mm: Really fix sparse warning in untagged_addr()
  UPSTREAM: selftests, arm64: add a selftest for passing tagged pointers to kernel
  BACKPORT: arm64: Introduce prctl() options to control the tagged user addresses ABI
  UPSTREAM: arm64: untag user pointers in access_ok and __uaccess_mask_ptr
  UPSTREAM: uaccess: add noop untagged_addr definition
  BACKPORT: block: annotate refault stalls from IO submission
  f2fs: add a condition to detect overflow in f2fs_ioc_gc_range()
  f2fs: fix to add missing F2FS_IO_ALIGNED() condition
  f2fs: fix to fallback to buffered IO in IO aligned mode
  f2fs: fix to handle error path correctly in f2fs_map_blocks
  f2fs: fix extent corrupotion during directIO in LFS mode
  f2fs: check all the data segments against all node ones
  f2fs: Add a small clarification to CONFIG_FS_F2FS_FS_SECURITY
  f2fs: fix inode rwsem regression
  f2fs: fix to avoid accessing uninitialized field of inode page in is_alive()
  f2fs: avoid infinite GC loop due to stale atomic files
  f2fs: Fix indefinite loop in f2fs_gc()
  f2fs: convert inline_data in prior to i_size_write
  f2fs: fix error path of f2fs_convert_inline_page()
  f2fs: add missing documents of reserve_root/resuid/resgid
  f2fs: fix flushing node pages when checkpoint is disabled
  f2fs: enhance f2fs_is_checkpoint_ready()'s readability
  f2fs: clean up __bio_alloc()'s parameter
  f2fs: fix wrong error injection path in inc_valid_block_count()
  f2fs: fix to writeout dirty inode during node flush
  f2fs: optimize case-insensitive lookups
  f2fs: introduce f2fs_match_name() for cleanup
  f2fs: Fix indefinite loop in f2fs_gc()
  f2fs: allocate memory in batch in build_sit_info()
  f2fs: support FS_IOC_{GET,SET}FSLABEL
  f2fs: fix to avoid data corruption by forbidding SSR overwrite
  f2fs: Fix build error while CONFIG_NLS=m
  Revert "f2fs: avoid out-of-range memory access"
  f2fs: cleanup the code in build_sit_entries.
  f2fs: fix wrong available node count calculation
  f2fs: remove duplicate code in f2fs_file_write_iter
  f2fs: fix to migrate blocks correctly during defragment
  f2fs: use wrapped f2fs_cp_error()
  f2fs: fix to use more generic EOPNOTSUPP
  f2fs: use wrapped IS_SWAPFILE()
  f2fs: Support case-insensitive file name lookups
  f2fs: include charset encoding information in the superblock
  fs: Reserve flag for casefolding
  f2fs: fix to avoid call kvfree under spinlock
  fs: f2fs: Remove unnecessary checks of SM_I(sbi) in update_general_status()
  f2fs: disallow direct IO in atomic write
  f2fs: fix to handle quota_{on,off} correctly
  f2fs: fix to detect cp error in f2fs_setxattr()
  f2fs: fix to spread f2fs_is_checkpoint_ready()
  f2fs: support fiemap() for directory inode
  f2fs: fix to avoid discard command leak
  f2fs: fix to avoid tagging SBI_QUOTA_NEED_REPAIR incorrectly
  f2fs: fix to drop meta/node pages during umount
  f2fs: disallow switching io_bits option during remount
  f2fs: fix panic of IO alignment feature
  f2fs: introduce {page,io}_is_mergeable() for readability
  f2fs: fix livelock in swapfile writes
  f2fs: add fs-verity support
  ext4: update on-disk format documentation for fs-verity
  ext4: add fs-verity read support
  ext4: add basic fs-verity support
  fs-verity: support builtin file signatures
  fs-verity: add SHA-512 support
  fs-verity: implement FS_IOC_MEASURE_VERITY ioctl
  fs-verity: implement FS_IOC_ENABLE_VERITY ioctl
  fs-verity: add data verification hooks for ->readpages()
  fs-verity: add the hook for file ->setattr()
  fs-verity: add the hook for file ->open()
  fs-verity: add inode and superblock fields
  fs-verity: add Kconfig and the helper functions for hashing
  fs: uapi: define verity bit for FS_IOC_GETFLAGS
  fs-verity: add UAPI header
  fs-verity: add MAINTAINERS file entry
  fs-verity: add a documentation file
  ext4: fix kernel oops caused by spurious casefold flag
  ext4: fix coverity warning on error path of filename setup
  ext4: optimize case-insensitive lookups
  ext4: fix dcache lookup of !casefolded directories
  unicode: update to Unicode 12.1.0 final
  unicode: add missing check for an error return from utf8lookup()
  ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
  unicode: refactor the rule for regenerating utf8data.h
  ext4: Support case-insensitive file name lookups
  ext4: include charset encoding information in the superblock
  unicode: update unicode database unicode version 12.1.0
  unicode: introduce test module for normalized utf8 implementation
  unicode: implement higher level API for string handling
  unicode: reduce the size of utf8data[]
  unicode: introduce code for UTF-8 normalization
  unicode: introduce UTF-8 character database
  ext4 crypto: fix to check feature status before get policy
  fscrypt: document the new ioctls and policy version
  ubifs: wire up new fscrypt ioctls
  f2fs: wire up new fscrypt ioctls
  ext4: wire up new fscrypt ioctls
  fscrypt: require that key be added when setting a v2 encryption policy
  fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl
  fscrypt: allow unprivileged users to add/remove keys for v2 policies
  fscrypt: v2 encryption policy support
  fscrypt: add an HKDF-SHA512 implementation
  fscrypt: add FS_IOC_GET_ENCRYPTION_KEY_STATUS ioctl
  fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY ioctl
  fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl
  fscrypt: rename keyinfo.c to keysetup.c
  fscrypt: move v1 policy key setup to keysetup_v1.c
  fscrypt: refactor key setup code in preparation for v2 policies
  fscrypt: rename fscrypt_master_key to fscrypt_direct_key
  fscrypt: add ->ci_inode to fscrypt_info
  fscrypt: use FSCRYPT_* definitions, not FS_*
  fscrypt: use FSCRYPT_ prefix for uapi constants
  fs, fscrypt: move uapi definitions to new header <linux/fscrypt.h>
  fscrypt: use ENOPKG when crypto API support missing
  fscrypt: improve warnings for missing crypto API support
  fscrypt: improve warning messages for unsupported encryption contexts
  fscrypt: make fscrypt_msg() take inode instead of super_block
  fscrypt: clean up base64 encoding/decoding
  fscrypt: remove loadable module related code

Updated following files to fix build errors:
	drivers/gpu/msm/kgsl_pool.c
	drivers/hwtracing/coresight/coresight-dummy.c
	drivers/iommu/dma-mapping-fast.c
	drivers/iommu/io-pgtable-fast.c
	drivers/iommu/io-pgtable-msm-secure.c
	kernel/taskstats.c
	mm/vmalloc.c
	security/selinux/ss/sidtab.h

Conflicts:
	arch/arm/Makefile
	arch/arm64/Kconfig
	arch/x86/include/asm/syscall_wrapper.h
	build.config.common
	drivers/clk/clk.c
	drivers/hwtracing/coresight/coresight-etm-perf.c
	drivers/hwtracing/coresight/coresight-funnel.c
	drivers/hwtracing/coresight/coresight-tmc-etf.c
	drivers/hwtracing/coresight/coresight-tmc-etr.c
	drivers/hwtracing/coresight/coresight-tmc.c
	drivers/hwtracing/coresight/coresight-tmc.h
	drivers/hwtracing/coresight/coresight.c
	drivers/hwtracing/coresight/of_coresight.c
	drivers/iommu/arm-smmu.c
	drivers/iommu/io-pgtable-arm.c
	drivers/iommu/io-pgtable.c
	drivers/scsi/scsi_sysfs.c
	drivers/scsi/sd.c
	drivers/scsi/ufs/ufshcd.c
	drivers/scsi/ufs/ufshcd.h
	drivers/staging/android/ion/ion.c
	drivers/staging/android/ion/ion.h
	drivers/staging/android/ion/ion_page_pool.c
	fs/ext4/readpage.c
	fs/f2fs/data.c
	fs/f2fs/f2fs.h
	fs/f2fs/file.c
	fs/f2fs/segment.c
	fs/f2fs/super.c
	include/linux/clk-provider.h
	include/linux/compiler_types.h
	include/linux/coresight.h
	include/linux/mmzone.h
	include/scsi/scsi_device.h
	include/trace/events/kmem.h
	kernel/events/core.c
	kernel/sched/core.c
	mm/vmstat.c

Change-Id: I2eca52b08b484f2b5c30437671cab8cb0195b8d6
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
2020-03-27 10:48:20 -07:00
Ivaylo Georgiev
6a67f069c6 Merge android-4.19.66 (487e617) into msm-4.19
* refs/heads/tmp-487e617:
  ANDROID: update ABI dump
  ANDROID: gki_defconfig: disable IP_PNP, ECRYPT_FS
  ANDROID: gki_defconfig: backport from mainline branch
  UPSTREAM: net-ipv6-ndisc: add support for RFC7710 RA Captive Portal Identifier
  ANDROID: add GKI artifacts
  f2fs: use EINVAL for superblock with invalid magic
  f2fs: fix to read source block before invalidating it
  f2fs: remove redundant check from f2fs_setflags_common()
  f2fs: use generic checking function for FS_IOC_FSSETXATTR
  f2fs: use generic checking and prep function for FS_IOC_SETFLAGS
  ubifs, fscrypt: cache decrypted symlink target in ->i_link
  vfs: use READ_ONCE() to access ->i_link
  fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
  fscrypt: cache decrypted symlink target in ->i_link
  fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext
  fscrypt: only set dentry_operations on ciphertext dentries
  fscrypt: fix race allowing rename() and link() of ciphertext dentries
  fscrypt: clean up and improve dentry revalidation
  fscrypt: use READ_ONCE() to access ->i_crypt_info
  fscrypt: remove WARN_ON_ONCE() when decryption fails
  fscrypt: drop inode argument from fscrypt_get_ctx()
  f2fs: improve print log in f2fs_sanity_check_ckpt()
  f2fs: avoid out-of-range memory access
  f2fs: fix to avoid long latency during umount
  f2fs: allow all the users to pin a file
  f2fs: support swap file w/ DIO
  f2fs: allocate blocks for pinned file
  f2fs: fix is_idle() check for discard type
  f2fs: add a rw_sem to cover quota flag changes
  f2fs: set SBI_NEED_FSCK for xattr corruption case
  f2fs: use generic EFSBADCRC/EFSCORRUPTED
  f2fs: Use DIV_ROUND_UP() instead of open-coding
  f2fs: print kernel message if filesystem is inconsistent
  f2fs: introduce f2fs_<level> macros to wrap f2fs_printk()
  f2fs: avoid get_valid_blocks() for cleanup
  f2fs: ioctl for removing a range from F2FS
  f2fs: only set project inherit bit for directory
  f2fs: separate f2fs i_flags from fs_flags and ext4 i_flags
  f2fs: Add option to limit required GC for checkpoint=disable
  f2fs: Fix accounting for unusable blocks
  f2fs: Fix root reserved on remount
  f2fs: Lower threshold for disable_cp_again
  f2fs: fix sparse warning
  f2fs: fix f2fs_show_options to show nodiscard mount option
  f2fs: add error prints for debugging mount failure
  f2fs: fix to do sanity check on segment bitmap of LFS curseg
  f2fs: add missing sysfs entries in documentation
  f2fs: fix to avoid deadloop if data_flush is on
  f2fs: always assume that the device is idle under gc_urgent
  f2fs: add bio cache for IPU
  f2fs: allow ssr block allocation during checkpoint=disable period
  f2fs: fix to check layout on last valid checkpoint park

Conflicts:
	fs/crypto/bio.c
	fs/f2fs/inline.c
	fs/f2fs/node.c
	fs/f2fs/recovery.c
	fs/f2fs/segment.c
	fs/f2fs/super.c
	fs/f2fs/xattr.c

Change-Id: I569e91b49192e755afb388dc753b13930a50e944
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
2020-02-24 07:41:17 -08:00
Vlastimil Babka
0ca673b38f UPSTREAM: dcache: allocate external names from reclaimable kmalloc caches
We can use the newly introduced kmalloc-reclaimable-X caches, to allocate
external names in dcache, which will take care of the proper accounting
automatically, and also improve anti-fragmentation page grouping.

This effectively reverts commit f1782c9bc5 ("dcache: account external
names as indirectly reclaimable memory") and instead passes
__GFP_RECLAIMABLE to kmalloc().  The accounting thus moves from
NR_INDIRECTLY_RECLAIMABLE_BYTES to NR_SLAB_RECLAIMABLE, which is also
considered in MemAvailable calculation and overcommit decisions.

Link: http://lkml.kernel.org/r/20180731090649.16028-4-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Vijayanand Jitta <vjitta@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 2e03b4bc4ae84fcc0eee00e5ba5d228901d38809)

Bug: 138148041
Test: verify KReclaimable accounting after ION allocation+deallocation
Change-Id: I7db8f9d202aed82dafa28b82ed6615927a63558d
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2019-12-13 14:04:22 -08:00
Jaegeuk Kim
e6f3ddbf65 Merge remote-tracking branch 'origin/upstream-f2fs-stable-linux-4.19.y' into android-4.19
* origin/upstream-f2fs-stable-linux-4.19.y:
  f2fs: use EINVAL for superblock with invalid magic
  f2fs: fix to read source block before invalidating it
  f2fs: remove redundant check from f2fs_setflags_common()
  f2fs: use generic checking function for FS_IOC_FSSETXATTR
  f2fs: use generic checking and prep function for FS_IOC_SETFLAGS
  ubifs, fscrypt: cache decrypted symlink target in ->i_link
  vfs: use READ_ONCE() to access ->i_link
  fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
  fscrypt: cache decrypted symlink target in ->i_link
  fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext
  fscrypt: only set dentry_operations on ciphertext dentries
  fscrypt: fix race allowing rename() and link() of ciphertext dentries
  fscrypt: clean up and improve dentry revalidation
  fscrypt: use READ_ONCE() to access ->i_crypt_info
  fscrypt: remove WARN_ON_ONCE() when decryption fails
  fscrypt: drop inode argument from fscrypt_get_ctx()
  f2fs: improve print log in f2fs_sanity_check_ckpt()
  f2fs: avoid out-of-range memory access
  f2fs: fix to avoid long latency during umount
  f2fs: allow all the users to pin a file
  f2fs: support swap file w/ DIO
  f2fs: allocate blocks for pinned file
  f2fs: fix is_idle() check for discard type
  f2fs: add a rw_sem to cover quota flag changes
  f2fs: set SBI_NEED_FSCK for xattr corruption case
  f2fs: use generic EFSBADCRC/EFSCORRUPTED
  f2fs: Use DIV_ROUND_UP() instead of open-coding
  f2fs: print kernel message if filesystem is inconsistent
  f2fs: introduce f2fs_<level> macros to wrap f2fs_printk()
  f2fs: avoid get_valid_blocks() for cleanup
  f2fs: ioctl for removing a range from F2FS
  f2fs: only set project inherit bit for directory
  f2fs: separate f2fs i_flags from fs_flags and ext4 i_flags
  f2fs: Add option to limit required GC for checkpoint=disable
  f2fs: Fix accounting for unusable blocks
  f2fs: Fix root reserved on remount
  f2fs: Lower threshold for disable_cp_again
  f2fs: fix sparse warning
  f2fs: fix f2fs_show_options to show nodiscard mount option
  f2fs: add error prints for debugging mount failure
  f2fs: fix to do sanity check on segment bitmap of LFS curseg
  f2fs: add missing sysfs entries in documentation
  f2fs: fix to avoid deadloop if data_flush is on
  f2fs: always assume that the device is idle under gc_urgent
  f2fs: add bio cache for IPU
  f2fs: allow ssr block allocation during checkpoint=disable period
  f2fs: fix to check layout on last valid checkpoint park

Change-Id: Ie910f127f574c2115e5b9a6725461ce002c267be
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
2019-07-31 21:34:30 -07:00
Eric Biggers
dd038b348f fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
Make __d_move() clear DCACHE_ENCRYPTED_NAME on the source dentry.  This
is needed for when d_splice_alias() moves a directory's encrypted alias
to its decrypted alias as a result of the encryption key being added.

Otherwise, the decrypted alias will incorrectly be invalidated on the
next lookup, causing problems such as unmounting a mount the user just
mount()ed there.

Note that we don't have to support arbitrary moves of this flag because
fscrypt doesn't allow dentries with DCACHE_ENCRYPTED_NAME to be the
source or target of a rename().

Fixes: 28b4c26396 ("ext4 crypto: revalidate dentry after adding or removing the key")
Reported-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-07-30 09:55:43 -07:00
Sahitya Tummala
b1175fcfc2 fs/dcache: Fix indefinite wait in d_invalidate()
In the path of task exit, the proc dentries corresponding to this
task will be killed by moving it to a shrink list. If those dentries
are already claimed by another task for shrinking, the exiting
task waits in a tight loop until those dentries are killed. This can
potentially result in a deadlock if those dentries are corresponding
to an RT task but the task which is shrinking those dentries is a
lower priority task. Fix this by not doing tight loop, if our dentries
are claimed by other task.

Change-Id: If6848521469db7dea2bbba0dbaf8597094716267
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
2019-07-22 09:20:22 +05:30
Al Viro
c939121b54 dcache: sort the freeing-without-RCU-delay mess for good.
commit 5467a68cbf6884c9a9d91e2a89140afb1839c835 upstream.

For lockless accesses to dentries we don't have pinned we rely
(among other things) upon having an RCU delay between dropping
the last reference and actually freeing the memory.

On the other hand, for things like pipes and sockets we neither
do that kind of lockless access, nor want to deal with the
overhead of an RCU delay every time a socket gets closed.

So delay was made optional - setting DCACHE_RCUACCESS in ->d_flags
made sure it would happen.  We tried to avoid setting it unless
we knew we need it.  Unfortunately, that had led to recurring
class of bugs, in which we missed the need to set it.

We only really need it for dentries that are created by
d_alloc_pseudo(), so let's not bother with trying to be smart -
just make having an RCU delay the default.  The ones that do
*not* get it set the replacement flag (DCACHE_NORCU) and we'd
better use that sparingly.  d_alloc_pseudo() is the only
such user right now.

FWIW, the race that finally prompted that switch had been
between __lock_parent() of immediate subdirectory of what's
currently the root of a disconnected tree (e.g. from
open-by-handle in progress) racing with d_splice_alias()
elsewhere picking another alias for the same inode, either
on outright corrupted fs image, or (in case of open-by-handle
on NFS) that subdirectory having been just moved on server.
It's not easy to hit, so the sky is not falling, but that's
not the first race on similar missed cases and the logics
for settinf DCACHE_RCUACCESS has gotten ridiculously
convoluted.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-25 18:23:26 +02:00
Waiman Long
bb4e1ff5a8 fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
commit 1dbd449c9943e3145148cc893c2461b72ba6fef0 upstream.

The nr_dentry_unused per-cpu counter tracks dentries in both the LRU
lists and the shrink lists where the DCACHE_LRU_LIST bit is set.

The shrink_dcache_sb() function moves dentries from the LRU list to a
shrink list and subtracts the dentry count from nr_dentry_unused.  This
is incorrect as the nr_dentry_unused count will also be decremented in
shrink_dentry_list() via d_shrink_del().

To fix this double decrement, the decrement in the shrink_dcache_sb()
function is taken out.

Fixes: 4e717f5c10 ("list_lru: remove special case function list_lru_dispose_all."
Cc: stable@kernel.org
Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-06 17:30:11 +01:00
Tetsuo Handa
6cd00a01f0 fs/dcache.c: fix kmemcheck splat at take_dentry_name_snapshot()
Since only dentry->d_name.len + 1 bytes out of DNAME_INLINE_LEN bytes
are initialized at __d_alloc(), we can't copy the whole size
unconditionally.

 WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (ffff8fa27465ac50)
 636f6e66696766732e746d70000000000010000000000000020000000188ffff
  i i i i i i i i i i i i i u u u u u u u u u u i i i i i u u u u
                                  ^
 RIP: 0010:take_dentry_name_snapshot+0x28/0x50
 RSP: 0018:ffffa83000f5bdf8 EFLAGS: 00010246
 RAX: 0000000000000020 RBX: ffff8fa274b20550 RCX: 0000000000000002
 RDX: ffffa83000f5be40 RSI: ffff8fa27465ac50 RDI: ffffa83000f5be60
 RBP: ffffa83000f5bdf8 R08: ffffa83000f5be48 R09: 0000000000000001
 R10: ffff8fa27465ac00 R11: ffff8fa27465acc0 R12: ffff8fa27465ac00
 R13: ffff8fa27465acc0 R14: 0000000000000000 R15: 0000000000000000
 FS:  00007f79737ac8c0(0000) GS:ffffffff8fc30000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: ffff8fa274c0b000 CR3: 0000000134aa7002 CR4: 00000000000606f0
  take_dentry_name_snapshot+0x28/0x50
  vfs_rename+0x128/0x870
  SyS_rename+0x3b2/0x3d0
  entry_SYSCALL_64_fastpath+0x1a/0xa4
  0xffffffffffffffff

Link: http://lkml.kernel.org/r/201709131912.GBG39012.QMJLOVFSFFOOtH@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-17 16:20:28 -07:00
Linus Torvalds
4591343e35 Merge branches 'work.misc' and 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro:
 "Misc cleanups from various folks all over the place

  I expected more fs/dcache.c cleanups this cycle, so that went into a
  separate branch. Said cleanups have missed the window, so in the
  hindsight it could've gone into work.misc instead. Decided not to
  cherry-pick, thus the 'work.dcache' branch"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: dcache: Use true and false for boolean values
  fold generic_readlink() into its only caller
  fs: shave 8 bytes off of struct inode
  fs: Add more kernel-doc to the produced documentation
  fs: Fix attr.c kernel-doc
  removed extra extern file_fdatawait_range

* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kill dentry_update_name_case()
2018-08-13 21:28:25 -07:00
Linus Torvalds
0ea97a2d61 Merge branch 'work.mkdir' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs icache updates from Al Viro:

 - NFS mkdir/open_by_handle race fix

 - analogous solution for FUSE, replacing the one currently in mainline

 - new primitive to be used when discarding halfway set up inodes on
   failed object creation; gives sane warranties re icache lookups not
   returning such doomed by still not freed inodes. A bunch of
   filesystems switched to that animal.

 - Miklos' fix for last cycle regression in iget5_locked(); -stable will
   need a slightly different variant, unfortunately.

 - misc bits and pieces around things icache-related (in adfs and jfs).

* 'work.mkdir' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  jfs: don't bother with make_bad_inode() in ialloc()
  adfs: don't put inodes into icache
  new helper: inode_fake_hash()
  vfs: don't evict uninitialized inode
  jfs: switch to discard_new_inode()
  ext2: make sure that partially set up inodes won't be returned by ext2_iget()
  udf: switch to discard_new_inode()
  ufs: switch to discard_new_inode()
  btrfs: switch to discard_new_inode()
  new primitive: discard_new_inode()
  kill d_instantiate_no_diralias()
  nfs_instantiate(): prevent multiple aliases for directory inode
2018-08-13 20:25:58 -07:00
Al Viro
4c0d7cd5c8 make sure that __dentry_kill() always invalidates d_seq, unhashed or not
RCU pathwalk relies upon the assumption that anything that changes
->d_inode of a dentry will invalidate its ->d_seq.  That's almost
true - the one exception is that the final dput() of already unhashed
dentry does *not* touch ->d_seq at all.  Unhashing does, though,
so for anything we'd found by RCU dcache lookup we are fine.
Unfortunately, we can *start* with an unhashed dentry or jump into
it.

We could try and be careful in the (few) places where that could
happen.  Or we could just make the final dput() invalidate the damn
thing, unhashed or not.  The latter is much simpler and easier to
backport, so let's do it that way.

Reported-by: "Dae R. Jeong" <threeearcat@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-08-09 18:07:15 -04:00
Al Viro
90bad5e05b root dentries need RCU-delayed freeing
Since mountpoint crossing can happen without leaving lazy mode,
root dentries do need the same protection against having their
memory freed without RCU delay as everything else in the tree.

It's partially hidden by RCU delay between detaching from the
mount tree and dropping the vfsmount reference, but the starting
point of pathwalk can be on an already detached mount, in which
case umount-caused RCU delay has already passed by the time the
lazy pathwalk grabs rcu_read_lock().  If the starting point
happens to be at the root of that vfsmount *and* that vfsmount
covers the entire filesystem, we get trouble.

Fixes: 48a066e72d ("RCU'd vsfmounts")
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-08-06 09:13:32 -04:00
Gustavo A. R. Silva
7964410fcf fs: dcache: Use true and false for boolean values
Return statements in functions returning bool should use true or false
instead of an integer value.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-08-05 15:52:44 -04:00
Al Viro
c2b6d621c4 new primitive: discard_new_inode()
We don't want open-by-handle picking half-set-up in-core
struct inode from e.g. mkdir() having failed halfway through.
In other words, we don't want such inodes returned by iget_locked()
on their way to extinction.  However, we can't just have them
unhashed - otherwise open-by-handle immediately *after* that would've
ended up creating a new in-core inode over the on-disk one that
is in process of being freed right under us.

	Solution: new flag (I_CREATING) set by insert_inode_locked() and
removed by unlock_new_inode() and a new primitive (discard_new_inode())
to be used by such halfway-through-setup failure exits instead of
unlock_new_inode() / iput() combinations.  That primitive unlocks new
inode, but leaves I_CREATING in place.

	iget_locked() treats finding an I_CREATING inode as failure
(-ESTALE, once we sort out the error propagation).
	insert_inode_locked() treats the same as instant -EBUSY.
	ilookup() treats those as icache miss.

[Fix by Dan Carpenter <dan.carpenter@oracle.com> folded in]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-08-03 15:55:30 -04:00
Al Viro
c971e6a006 kill d_instantiate_no_diralias()
The only user is fuse_create_new_entry(), and there it's used to
mitigate the same mkdir/open-by-handle race as in nfs_mkdir().
The same solution applies - unhash the mkdir argument, then
call d_splice_alias() and if that returns a reference to preexisting
alias, dput() and report success.  ->mkdir() argument left unhashed
negative with the preexisting alias moved in the right place is just
fine from the ->mkdir() callers point of view.

Cc: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-08-01 23:18:53 -04:00
Al Viro
63a67a926e kill dentry_update_name_case()
the last user is gone

Spotted-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-06-23 17:16:44 -04:00
Linus Torvalds
f956d08a56 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro:
 "Misc bits and pieces not fitting into anything more specific"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: delete unnecessary assignment in vfs_listxattr
  Documentation: filesystems: update filesystem locking documentation
  vfs: namei: use path_equal() in follow_dotdot()
  fs.h: fix outdated comment about file flags
  __inode_security_revalidate() never gets NULL opt_dentry
  make xattr_getsecurity() static
  vfat: simplify checks in vfat_lookup()
  get rid of dead code in d_find_alias()
  it's SB_BORN, not MS_BORN...
  msdos_rmdir(): kill BS comment
  remove rpc_rmdir()
  fs: avoid fdput() after failed fdget() in vfs_dedupe_file_range()
2018-06-04 10:14:28 -07:00
Linus Torvalds
06c86e66d6 Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull dcache updates from Al Viro:
 "This is the first part of dealing with livelocks etc around
  shrink_dcache_parent()."

* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  restore cond_resched() in shrink_dcache_parent()
  dput(): turn into explicit while() loop
  dcache: move cond_resched() into the end of __dentry_kill()
  d_walk(): kill 'finish' callback
  d_invalidate(): unhash immediately
2018-06-04 08:57:36 -07:00
Al Viro
61fec493c9 get rid of dead code in d_find_alias()
All "try disconnected alias if nothing else fits" logics in d_find_alias()
got accidentally disabled by Neil a while ago; for most of the callers it
was the right thing to do, so fixes belong in few callers that *do* want
disconnected aliases.  This just takes the now-dead code in d_find_alias()
out.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-05-13 12:08:32 -04:00
Al Viro
1e2e547a93 do d_instantiate/unlock_new_inode combinations safely
For anything NFS-exported we do _not_ want to unlock new inode
before it has grown an alias; original set of fixes got the
ordering right, but missed the nasty complication in case of
lockdep being enabled - unlock_new_inode() does
	lockdep_annotate_inode_mutex_key(inode)
which can only be done before anyone gets a chance to touch
->i_mutex.  Unfortunately, flipping the order and doing
unlock_new_inode() before d_instantiate() opens a window when
mkdir can race with open-by-fhandle on a guessed fhandle, leading
to multiple aliases for a directory inode and all the breakage
that follows from that.

	Correct solution: a new primitive (d_instantiate_new())
combining these two in the right order - lockdep annotate, then
d_instantiate(), then the rest of unlock_new_inode().  All
combinations of d_instantiate() with unlock_new_inode() should
be converted to that.

Cc: stable@kernel.org	# 2.6.29 and later
Tested-by: Mike Marshall <hubcap@omnibond.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-05-11 15:36:37 -04:00
Al Viro
4fb4887140 restore cond_resched() in shrink_dcache_parent()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-19 23:58:48 -04:00
Al Viro
1088a6408c dput(): turn into explicit while() loop
No need to mess with gotos when the code yielded by straight while()
isn't any worse...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-15 23:36:58 -04:00
Al Viro
9c5f1d3019 dcache: move cond_resched() into the end of __dentry_kill()
cond_resched() in shrink_dentry_list() is too early

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-15 23:36:58 -04:00
Al Viro
3a8e3611e0 d_walk(): kill 'finish' callback
no users left

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-15 23:36:57 -04:00
Al Viro
ff17fa561a d_invalidate(): unhash immediately
Once that is done, we can just hunt mountpoints down one by one;
no new mountpoints can be added from now on, so we don't need
anything tricky in finish() callback, etc.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-04-15 23:36:57 -04:00
Nikolay Borisov
32785c0539 fs/dcache.c: add cond_resched() in shrink_dentry_list()
As previously reported (https://patchwork.kernel.org/patch/8642031/)
it's possible to call shrink_dentry_list with a large number of dentries
(> 10000).  This, in turn, could trigger the softlockup detector and
possibly trigger a panic.  In addition to the unmount path being
vulnerable to this scenario, at SuSE we've observed similar situation
happening during process exit on processes that touch a lot of dentries.
Here is an excerpt from a crash dump.  The number after the colon are
the number of dentries on the list passed to shrink_dentry_list:

PID 99760: 10722
PID 107530: 215
PID 108809: 24134
PID 108877: 21331
PID 141708: 16487

So we want to kill between 15k-25k dentries without yielding.

And one possible call stack looks like:

4 [ffff8839ece41db0] _raw_spin_lock at ffffffff8152a5f8
5 [ffff8839ece41db0] evict at ffffffff811c3026
6 [ffff8839ece41dd0] __dentry_kill at ffffffff811bf258
7 [ffff8839ece41df0] shrink_dentry_list at ffffffff811bf593
8 [ffff8839ece41e18] shrink_dcache_parent at ffffffff811bf830
9 [ffff8839ece41e50] proc_flush_task at ffffffff8120dd61
10 [ffff8839ece41ec0] release_task at ffffffff81059ebd
11 [ffff8839ece41f08] do_exit at ffffffff8105b8ce
12 [ffff8839ece41f78] sys_exit at ffffffff8105bd53
13 [ffff8839ece41f80] system_call_fastpath at ffffffff81532909

While some of the callers of shrink_dentry_list do use cond_resched,
this is not sufficient to prevent softlockups.  So just move
cond_resched into shrink_dentry_list from its callers.

David said: I've found hundreds of occurrences of warnings that we emit
when need_resched stays set for a prolonged period of time with the
stack trace that is included in the change log.

Link: http://lkml.kernel.org/r/1521718946-31521-1-git-send-email-nborisov@suse.com
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Goldwyn Rodrigues <rgoldwyn@suse.de>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-11 10:28:38 -07:00
Roman Gushchin
f1782c9bc5 dcache: account external names as indirectly reclaimable memory
I received a report about suspicious growth of unreclaimable slabs on
some machines.  I've found that it happens on machines with low memory
pressure, and these unreclaimable slabs are external names attached to
dentries.

External names are allocated using generic kmalloc() function, so they
are accounted as unreclaimable.  But they are held by dentries, which
are reclaimable, and they will be reclaimed under the memory pressure.

In particular, this breaks MemAvailable calculation, as it doesn't take
unreclaimable slabs into account.  This leads to a silly situation, when
a machine is almost idle, has no memory pressure and therefore has a big
dentry cache.  And the resulting MemAvailable is too low to start a new
workload.

To address the issue, the NR_INDIRECTLY_RECLAIMABLE_BYTES counter is
used to track the amount of memory, consumed by external names.  The
counter is increased in the dentry allocation path, if an external name
structure is allocated; and it's decreased in the dentry freeing path.

To reproduce the problem I've used the following Python script:

  import os

  for iter in range (0, 10000000):
      try:
          name = ("/some_long_name_%d" % iter) + "_" * 220
          os.stat(name)
      except Exception:
          pass

Without this patch:
  $ cat /proc/meminfo | grep MemAvailable
  MemAvailable:    7811688 kB
  $ python indirect.py
  $ cat /proc/meminfo | grep MemAvailable
  MemAvailable:    2753052 kB

With the patch:
  $ cat /proc/meminfo | grep MemAvailable
  MemAvailable:    7809516 kB
  $ python indirect.py
  $ cat /proc/meminfo | grep MemAvailable
  MemAvailable:    7749144 kB

[guro@fb.com: fix indirectly reclaimable memory accounting for CONFIG_SLOB]
  Link: http://lkml.kernel.org/r/20180312194140.19517-1-guro@fb.com
[guro@fb.com: fix indirectly reclaimable memory accounting]
  Link: http://lkml.kernel.org/r/20180313125701.7955-1-guro@fb.com
Link: http://lkml.kernel.org/r/20180305133743.12746-5-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-11 10:28:29 -07:00
Al Viro
cbd4a5bcb2 d_genocide: move export to definition
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:08:21 -04:00
Al Viro
42177007aa fold dentry_lock_for_move() into its sole caller and clean it up
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:49 -04:00
Al Viro
076515fc92 make non-exchanging __d_move() copy ->d_parent rather than swap them
Currently d_move(from, to) does the following:
	* name/parent of from <- old name/parent of to, from hashed there
	* to is unhashed
	* name of to is preserved
	* if from used to be detached, to gets detached
	* if from used to be attached, parent of to <- old parent of from.

That's both user-visibly bogus and complicates reasoning a lot.
Much saner semantics would be
	* name/parent of from <- name/parent of to, from hashed there.
	* to is unhashed
	* name/parent of to is unchanged.

The price, of course, is that old parent of from might lose a reference.
However,
	* all potentially cross-directory callers of d_move() have both
parents pinned directly; typically, dentries themselves are grabbed
only after we have grabbed and locked both parents.  IOW, the decrement
of old parent's refcount in case of d_move() won't reach zero.
	* __d_move() from d_splice_alias() is done to detached alias.
No refcount decrements in that case
	* __d_move() from __d_unalias() *can* get the refcount to zero.
So let's grab a reference to alias' old parent before calling __d_unalias()
and dput() it after we'd dropped rename_lock.

That does make d_splice_alias() potentially blocking.  However, it has
no callers in non-sleepable contexts (and the case where we'd grown
that dget/dput pair is _very_ rare, so performance is not an issue).

Another thing that needs adjustment is unlocking in the end of __d_move();
folded it in.  And cleaned the remnants of bogus ordering from the
"lock them in the beginning" counterpart - it's never been right and
now (well, for 7 years now) we have that thing always serialized on
rename_lock anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:49 -04:00
Al Viro
7a5cf791a7 split d_path() and friends into a separate file
Those parts of fs/dcache.c are pretty much self-contained.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:46 -04:00
Al Viro
43986d63b6 dcache.c: trim includes
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:45 -04:00
John Ogness
8f04da2adb fs/dcache: Avoid a try_lock loop in shrink_dentry_list()
shrink_dentry_list() holds dentry->d_lock and needs to acquire
dentry->d_inode->i_lock. This cannot be done with a spin_lock()
operation because it's the reverse of the regular lock order.
To avoid ABBA deadlocks it is done with a trylock loop.

Trylock loops are problematic in two scenarios:

  1) PREEMPT_RT converts spinlocks to 'sleeping' spinlocks, which are
     preemptible. As a consequence the i_lock holder can be preempted
     by a higher priority task. If that task executes the trylock loop
     it will do so forever and live lock.

  2) In virtual machines trylock loops are problematic as well. The
     VCPU on which the i_lock holder runs can be scheduled out and a
     task on a different VCPU can loop for a whole time slice. In the
     worst case this can lead to starvation. Commits 47be61845c
     ("fs/dcache.c: avoid soft-lockup in dput()") and 046b961b45
     ("shrink_dentry_list(): take parent's d_lock earlier") are
     addressing exactly those symptoms.

Avoid the trylock loop by using dentry_kill(). When pruning ancestors,
the same code applies that is used to kill a dentry in dput(). This
also has the benefit that the locking order is now the same. First
the inode is locked, then the parent.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:44 -04:00
Al Viro
f657a666fd get rid of trylock loop around dentry_kill()
In case when trylock in there fails, deal with it directly in
dentry_kill().  Note that in cases when we drop and retake
->d_lock, we need to recheck whether to retain the dentry.
Another thing is that dropping/retaking ->d_lock might have
ended up with negative dentry turning into positive; that,
of course, can happen only once...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:44 -04:00
Al Viro
62d9956cef handle move to LRU in retain_dentry()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:43 -04:00
Al Viro
a338579f2f dput(): consolidate the "do we need to retain it?" into an inlined helper
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:43 -04:00
Al Viro
8b987a46a1 split the slow part of lock_parent() off
Turn the "trylock failed" part into uninlined __lock_parent().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:42 -04:00
Al Viro
65d8eb5a8f now lock_parent() can't run into killed dentry
all remaining callers hold either a reference or ->i_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:42 -04:00
Al Viro
3b3f09f48b get rid of trylock loop in locking dentries on shrink list
In case of trylock failure don't re-add to the list - drop the locks
and carefully get them in the right order.  For shrink_dentry_list(),
somebody having grabbed a reference to dentry means that we can
kick it off-list, so if we find dentry being modified under us we
don't need to play silly buggers with retries anyway - off the list
it is.

The locking logics taken out into a helper of its own; lock_parent()
is no longer used for dentries that can be killed under us.

[fix from Eric Biggers folded]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-03-29 15:07:02 -04:00