lineage-19.1
155 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Ivaylo Georgiev
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a025b6c910 |
Merge android-4.19.78 (75337a6) into msm-4.19
* refs/heads/tmp-75337a6:
ANDROID: usb: gadget: Fix dependency for f_accessory
ANDROID: properly export new symbols with _GPL tag
UPSTREAM: mm/kasan: fix false positive invalid-free reports with CONFIG_KASAN_SW_TAGS=y
UPSTREAM: kasan: initialize tag to 0xff in __kasan_kmalloc
UPSTREAM: x86/boot: Provide KASAN compatible aliases for string routines
UPSTREAM: x86/uaccess, kasan: Fix KASAN vs SMAP
BACKPORT: x86/uaccess: Introduce user_access_{save,restore}()
UPSTREAM: kasan: fix variable 'tag' set but not used warning
UPSTREAM: Revert "x86_64: Increase stack size for KASAN_EXTRA"
UPSTREAM: kasan: fix coccinelle warnings in kasan_p*_table
UPSTREAM: kasan: fix kasan_check_read/write definitions
BACKPORT: kasan: remove use after scope bugs detection.
BACKPORT: kasan: turn off asan-stack for clang-8 and earlier
UPSTREAM: slub: fix a crash with SLUB_DEBUG + KASAN_SW_TAGS
UPSTREAM: kasan, slab: remove redundant kasan_slab_alloc hooks
UPSTREAM: kasan, slab: make freelist stored without tags
UPSTREAM: kasan, slab: fix conflicts with CONFIG_HARDENED_USERCOPY
UPSTREAM: kasan: prevent tracing of tags.c
UPSTREAM: kasan: fix random seed generation for tag-based mode
UPSTREAM: slub: fix SLAB_CONSISTENCY_CHECKS + KASAN_SW_TAGS
UPSTREAM: kasan, slub: fix more conflicts with CONFIG_SLAB_FREELIST_HARDENED
UPSTREAM: kasan, slub: fix conflicts with CONFIG_SLAB_FREELIST_HARDENED
UPSTREAM: kasan, slub: move kasan_poison_slab hook before page_address
UPSTREAM: kasan, kmemleak: pass tagged pointers to kmemleak
UPSTREAM: kasan: fix assigning tags twice
UPSTREAM: kasan: mark file common so ftrace doesn't trace it
UPSTREAM: kasan, arm64: remove redundant ARCH_SLAB_MINALIGN define
UPSTREAM: kasan: fix krealloc handling for tag-based mode
UPSTREAM: kasan: make tag based mode work with CONFIG_HARDENED_USERCOPY
UPSTREAM: kasan, arm64: use ARCH_SLAB_MINALIGN instead of manual aligning
BACKPORT: mm/memblock.c: skip kmemleak for kasan_init()
UPSTREAM: kasan: add SPDX-License-Identifier mark to source files
UPSTREAM: kasan: update documentation
UPSTREAM: kasan, arm64: select HAVE_ARCH_KASAN_SW_TAGS
UPSTREAM: kasan: add __must_check annotations to kasan hooks
UPSTREAM: kasan, mm, arm64: tag non slab memory allocated via pagealloc
UPSTREAM: kasan, arm64: add brk handler for inline instrumentation
UPSTREAM: kasan: add hooks implementation for tag-based mode
UPSTREAM: mm: move obj_to_index to include/linux/slab_def.h
UPSTREAM: kasan: add bug reporting routines for tag-based mode
UPSTREAM: kasan: split out generic_report.c from report.c
UPSTREAM: kasan, mm: perform untagged pointers comparison in krealloc
BACKPORT: kasan, arm64: enable top byte ignore for the kernel
BACKPORT: kasan, arm64: fix up fault handling logic
UPSTREAM: kasan: preassign tags to objects with ctors or SLAB_TYPESAFE_BY_RCU
UPSTREAM: kasan, arm64: untag address in _virt_addr_is_linear
UPSTREAM: kasan: add tag related helper functions
UPSTREAM: arm64: move untagged_addr macro from uaccess.h to memory.h
BACKPORT: kasan: initialize shadow to 0xff for tag-based mode
BACKPORT: kasan: rename kasan_zero_page to kasan_early_shadow_page
UPSTREAM: kasan, arm64: adjust shadow size for tag-based mode
BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS
UPSTREAM: kasan: rename source files to reflect the new naming scheme
UPSTREAM: kasan: move common generic and tag-based code to common.c
UPSTREAM: kasan, slub: handle pointer tags in early_kmem_cache_node_alloc
UPSTREAM: kasan, mm: change hooks signatures
UPSTREAM: arm64: add EXPORT_SYMBOL_NOKASAN()
BACKPORT: compiler: remove __no_sanitize_address_or_inline again
UPSTREAM: mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t
UPSTREAM: lib/test_kasan.c: add tests for several string/memory API functions
UPSTREAM: arm64: lib: use C string functions with KASAN enabled
UPSTREAM: compiler: introduce __no_sanitize_address_or_inline
UPSTREAM: arm64: Fix typo in a comment in arch/arm64/mm/kasan_init.c
ANDROID: enable CONFIG_ION_SYSTEM_HEAP for GKI
Update ABI definition after libabigail upgrade
ANDROID: update abi due to 4.19.75 changes
ANDROID: Remove CONFIG_USELIB from x86 gki config
ANDROID: net: enable wireless core features with GKI_LEGACY_WEXT_ALLCONFIG
ANDROID: arm64: bpf: implement arch_bpf_jit_check_func
ANDROID: bpf: validate bpf_func when BPF_JIT is enabled with CFI
UPSTREAM: kcm: use BPF_PROG_RUN
ANDROID: gki_defconfig: CONFIG_MMC_BLOCK=m
UPSTREAM: psi: get poll_work to run when calling poll syscall next time
UPSTREAM: sched/psi: Do not require setsched permission from the trigger creator
UPSTREAM: sched/psi: Reduce psimon FIFO priority
ANDROID: gki_defconfig: Enable HiSilicon SoCs
UPSTREAM: PCI: kirin: Fix section mismatch warning
ANDROID: gki_defconfig: Enable SERIAL_DEV_BUS
ANDROID: gki_defconfig: Add GKI_HACKS_to_FIX config
ANDROID: init: GKI: enable hidden configs for GPIO
ANDROID: init: GKI: enable hidden configs for SND_SOC
ANDROID: init: GKI: enable hidden configs for regmap
ANDROID: init: GKI: enable hidden configs for DRM
ANDROID: init: GKI: add GKI_HACKS_TO_FIX
ABI: Update ABI after fscrypto merge
ANDROID: gki_defconfig: enable CONFIG_UIO
UPSTREAM: ALSA: pcm: add support for 352.8KHz and 384KHz sample rate
ANDROID: Log which device failed to suspend in dpm_suspend_start()
UPSTREAM: arm64: Add support for relocating the kernel with RELR relocations
ANDROID: update ABI after CONFIG_MMC=m
CONFIG_MMC=m
ABI: Update ABI for LTS, 8250 changes
ANDROID: Removed extraneous serial 8250 configs
Adding SERIAL_OF_PLATFORM module to gki
fscrypt: document testing with xfstests
fscrypt: remove selection of CONFIG_CRYPTO_SHA256
fscrypt: remove unnecessary includes of ratelimit.h
fscrypt: don't set policy for a dead directory
fscrypt: decrypt only the needed blocks in __fscrypt_decrypt_bio()
fscrypt: support decrypting multiple filesystem blocks per page
fscrypt: introduce fscrypt_decrypt_block_inplace()
fscrypt: handle blocksize < PAGE_SIZE in fscrypt_zeroout_range()
fscrypt: support encrypting multiple filesystem blocks per page
fscrypt: introduce fscrypt_encrypt_block_inplace()
fscrypt: clean up some BUG_ON()s in block encryption/decryption
fscrypt: rename fscrypt_do_page_crypto() to fscrypt_crypt_block()
fscrypt: remove the "write" part of struct fscrypt_ctx
fscrypt: simplify bounce page handling
Conflicts:
arch/Kconfig
fs/crypto/bio.c
fs/ext4/page-io.c
fs/f2fs/data.c
fs/f2fs/f2fs.h
fs/f2fs/super.c
include/linux/fscrypt.h
sound/core/pcm_native.c
Change-Id: Ia94ba2ae85e04be9f69115e2da2d69d0dc76545f
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
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Martin Schwidefsky
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0ab02b6a3a |
BACKPORT: compiler: remove __no_sanitize_address_or_inline again
(Upstream commit 163c8d54a997153ee1a1e07fcac087492ad85b37). The __no_sanitize_address_or_inline and __no_kasan_or_inline defines are almost identical. The only difference is that __no_kasan_or_inline does not have the 'notrace' attribute. To be able to replace __no_sanitize_address_or_inline with the older definition, add 'notrace' to __no_kasan_or_inline and change to two users of __no_sanitize_address_or_inline in the s390 code. The 'notrace' option is necessary for e.g. the __load_psw_mask function in arch/s390/include/asm/processor.h. Without the option it is possible to trace __load_psw_mask which leads to kernel stack overflow. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Pointed-out-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Change-Id: I27af631729f8ea52e55f31c02f584c01a0918073 Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Bug: 128674696 |
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Masahiro Yamada
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753328727c |
compiler.h: give up __compiletime_assert_fallback()
commit 81b45683487a51b0f4d3b29d37f20d6d078544e4 upstream.
__compiletime_assert_fallback() is supposed to stop building earlier
by using the negative-array-size method in case the compiler does not
support "error" attribute, but has never worked like that.
You can simply try:
BUILD_BUG_ON(1);
GCC immediately terminates the build, but Clang does not report
anything because Clang does not support the "error" attribute now.
It will later fail at link time, but __compiletime_assert_fallback()
is not working at least.
The root cause is commit
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Ivaylo Georgiev
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1b74ac0833 |
Merge android-4.19.36 (10f41ccfc) into msm-4.19
* refs/heads/tmp-10f41ccfc: Linux 4.19.36 appletalk: Fix compile regression mm: hide incomplete nr_indirectly_reclaimable in sysfs mm: hide incomplete nr_indirectly_reclaimable in /proc/zoneinfo IB/hfi1: Failed to drain send queue when QP is put into error state bpf: fix use after free in bpf_evict_inode include/linux/swap.h: use offsetof() instead of custom __swapoffset macro f2fs: fix to dirty inode for i_mode recovery rxrpc: Fix client call connect/disconnect race lib/div64.c: off by one in shift appletalk: Fix use-after-free in atalk_proc_exit drm/amdkfd: use init_mqd function to allocate object for hid_mqd (CI) ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t drm/nouveau/volt/gf117: fix speedo readout register PCI: Blacklist power management of Gigabyte X299 DESIGNARE EX PCIe ports coresight: cpu-debug: Support for CA73 CPUs Revert "ACPI / EC: Remove old CLEAR_ON_RESUME quirk" crypto: axis - fix for recursive locking from bottom half drm/panel: panel-innolux: set display off in innolux_panel_unprepare lkdtm: Add tests for NULL pointer dereference lkdtm: Print real addresses soc/tegra: pmc: Drop locking from tegra_powergate_is_powered() scsi: core: Avoid that system resume triggers a kernel warning iommu/dmar: Fix buffer overflow during PCI bus notification net: ip6_gre: fix possible NULL pointer dereference in ip6erspan_set_version crypto: sha512/arm - fix crash bug in Thumb2 build crypto: sha256/arm - fix crash bug in Thumb2 build xfrm: destroy xfrm_state synchronously on net exit path net/rds: fix warn in rds_message_alloc_sgs ACPI: EC / PM: Disable non-wakeup GPEs for suspend-to-idle ALSA: hda: fix front speakers on Huawei MBXP drm/ttm: Fix bo_global and mem_global kfree error platform/x86: Add Intel AtomISP2 dummy / power-management driver kernel: hung_task.c: disable on suspend cifs: fallback to older infolevels on findfirst queryinfo retry net: stmmac: Set OWN bit for jumbo frames f2fs: cleanup dirty pages if recover failed netfilter: nf_flow_table: remove flowtable hook flush routine in netns exit routine compiler.h: update definition of unreachable() KVM: nVMX: restore host state in nested_vmx_vmexit for VMFail HID: usbhid: Add quirk for Redragon/Dragonrise Seymur 2 ACPI / SBS: Fix GPE storm on recent MacBookPro's usbip: fix vhci_hcd controller counting ARM: samsung: Limit SAMSUNG_PM_CHECK config option to non-Exynos platforms pinctrl: core: make sure strcmp() doesn't get a null parameter HID: i2c-hid: override HID descriptors for certain devices Bluetooth: Fix debugfs NULL pointer dereference media: au0828: cannot kfree dev before usb disconnect powerpc/pseries: Remove prrn_work workqueue serial: uartps: console_setup() can't be placed to init section netfilter: xt_cgroup: shrink size of v2 path f2fs: fix to do sanity check with current segment number ASoC: Fix UBSAN warning at snd_soc_get/put_volsw_sx() 9p locks: add mount option for lock retry interval 9p: do not trust pdu content for stat item size f2fs: fix to avoid NULL pointer dereference on se->discard_map rsi: improve kernel thread handling to fix kernel panic gpio: pxa: handle corner case of unprobed device drm/cirrus: Use drm_framebuffer_put to avoid kernel oops in clean-up ext4: prohibit fstrim in norecovery mode x86/gart: Exclude GART aperture from kcore fix incorrect error code mapping for OBJECTID_NOT_FOUND x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error iommu/vt-d: Check capability before disabling protected memory drm/nouveau/debugfs: Fix check of pm_runtime_get_sync failure x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors x86/hyperv: Prevent potential NULL pointer dereference x86/hpet: Prevent potential NULL pointer dereference irqchip/mbigen: Don't clear eventid when freeing an MSI irqchip/stm32: Don't clear rising/falling config registers at init drm/exynos/mixer: fix MIXER shadow registry synchronisation code blk-iolatency: #include "blk.h" PM / Domains: Avoid a potential deadlock ACPI / utils: Drop reference in test for device presence perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test() perf tests: Fix memory leak by expr__find_other() in test__expr() perf tests: Fix a memory leak of cpu_map object in the openat_syscall_event_on_all_cpus test perf evsel: Free evsel->counts in perf_evsel__exit() perf hist: Add missing map__put() in error case perf top: Fix error handling in cmd_top() perf build-id: Fix memory leak in print_sdt_events() perf config: Fix a memory leak in collect_config() perf config: Fix an error in the config template documentation perf list: Don't forget to drop the reference to the allocated thread_map tools/power turbostat: return the exit status of a command x86/mm: Don't leak kernel addresses sched/core: Fix buffer overflow in cgroup2 property cpu.max sched/cpufreq: Fix 32-bit math overflow scsi: iscsi: flush running unbind operations when removing a session thermal/intel_powerclamp: fix truncated kthread name thermal/int340x_thermal: fix mode setting thermal/int340x_thermal: Add additional UUIDs thermal: bcm2835: Fix crash in bcm2835_thermal_debugfs thermal: samsung: Fix incorrect check after code merge thermal/intel_powerclamp: fix __percpu declaration of worker_data ALSA: opl3: fix mismatch between snd_opl3_drum_switch definition and declaration mmc: davinci: remove extraneous __init annotation i40iw: Avoid panic when handling the inetdev event IB/mlx4: Fix race condition between catas error reset and aliasguid flows drm/udl: use drm_gem_object_put_unlocked. auxdisplay: hd44780: Fix memory leak on ->remove() ALSA: sb8: add a check for request_region ALSA: echoaudio: add a check for ioremap_nocache ext4: report real fs size after failed resize ext4: add missing brelse() in add_new_gdb_meta_bg() ext4: avoid panic during forced reboot perf/core: Restore mmap record type correctly inotify: Fix fsnotify_mark refcount leak in inotify_update_existing_watch() arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM ARC: u-boot args: check that magic number is correct ANDROID: cuttlefish_defconfig: Enable L2TP/PPTP ANDROID: Makefile: Properly resolve 4.19.35 merge Make arm64 serial port config compatible with crosvm Conflicts: kernel/sched/cpufreq_schedutil.c Change-Id: I8f049eb34344f72bf2d202c5e360f448771c78f4 Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org> |
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ndesaulniers@google.com
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19e6ff0146 |
compiler.h: update definition of unreachable()
[ Upstream commit fe0640eb30b7da261ae84d252ed9ed3c7e68dfd8 ]
Fixes the objtool warning seen with Clang:
arch/x86/mm/fault.o: warning: objtool: no_context()+0x220: unreachable
instruction
Fixes commit
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Ivaylo Georgiev
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bb8fbbfe0f |
Merge android-4.19.26 (c97d2b5) into msm-4.19
* refs/heads/tmp-c97d2b5:
Linux 4.19.26
net: phylink: avoid resolving link state too early
pinctrl: max77620: Use define directive for max77620_pinconf_param values
udlfb: handle unplug properly
netfilter: ipt_CLUSTERIP: fix sleep-in-atomic bug in clusterip_config_entry_put()
netfilter: nfnetlink_osf: add missing fmatch check
netfilter: ipv6: Don't preserve original oif for loopback address
netfilter: nft_compat: use-after-free when deleting targets
netfilter: nf_tables: fix flush after rule deletion in the same batch
Revert "bridge: do not add port to router list when receives query with source 0.0.0.0"
staging: erofs: unzip_vle_lz4.c,utils.c: rectify BUG_ONs
staging: erofs: unzip_{pagevec.h,vle.c}: rectify BUG_ONs
staging: erofs: {dir,inode,super}.c: rectify BUG_ONs
staging: erofs: add a full barrier in erofs_workgroup_unfreeze
staging: erofs: fix `erofs_workgroup_{try_to_freeze, unfreeze}'
staging: erofs: atomic_cond_read_relaxed on ref-locked workgroup
staging: erofs: remove the redundant d_rehash() for the root dentry
staging: erofs: drop multiref support temporarily
staging: erofs: replace BUG_ON with DBG_BUGON in data.c
staging: erofs: complete error handing of z_erofs_do_read_page
staging: erofs: fix a bug when appling cache strategy
net: avoid false positives in untrusted gso validation
net: validate untrusted gso packets without csum offload
kvm: x86: Return LA57 feature based on hardware capability
mac80211: allocate tailroom for forwarded mesh packets
drm/amd/display: Fix MST reboot/poweroff sequence
drm/i915/fbdev: Actually configure untiled displays
gpu: drm: radeon: Set DPM_FLAG_NEVER_SKIP when enabling PM-runtime
drm/amdgpu: Set DPM_FLAG_NEVER_SKIP when enabling PM-runtime
ARC: define ARCH_SLAB_MINALIGN = 8
ARC: U-boot: check arguments paranoidly
ARCv2: Enable unaligned access in early ASM code
parisc: Fix ptrace syscall number modification
KEYS: always initialize keyring_index_key::desc_len
KEYS: user: Align the payload buffer
RDMA/srp: Rework SCSI device reset handling
net/mlx5e: XDP, fix redirect resources availability check
net_sched: fix two more memory leaks in cls_tcindex
net_sched: fix a memory leak in cls_tcindex
net_sched: fix a race condition in tcindex_destroy()
sit: check if IPv6 enabled before calling ip6_err_gen_icmpv6_unreach()
geneve: should not call rt6_lookup() when ipv6 was disabled
net: socket: make bond ioctls go through compat_ifreq_ioctl()
net: socket: fix SIOCGIFNAME in compat
Revert "kill dev_ifsioc()"
Revert "socket: fix struct ifreq size in compat ioctl"
team: avoid complex list operations in team_nl_cmd_options_set()
sctp: set stream ext to NULL after freeing it in sctp_stream_outq_migrate
sctp: call gso_reset_checksum when computing checksum in sctp_gso_segment
net: sfp: do not probe SFP module before we're attached
net/packet: fix 4gb buffer limit due to overflow check
net/mlx5e: Don't overwrite pedit action when multiple pedit used
net/mlx4_en: Force CHECKSUM_NONE for short ethernet frames
net: ena: fix race between link up and device initalization
ipv6: propagate genlmsg_reply return code
inet_diag: fix reporting cgroup classid and fallback to priority
batman-adv: fix uninit-value in batadv_interface_tx()
isdn: avm: Fix string plus integer warning from Clang
net/mlx5e: Fix wrong (zero) TX drop counter indication for representor
selftests: forwarding: Add a test case for externally learned FDB entries
mlxsw: spectrum_switchdev: Do not treat static FDB entries as sticky
net: bridge: Mark FDB entries that were added by user as such
mlxsw: pci: Return error on PCI reset timeout
dpaa_eth: NETIF_F_LLTX requires to do our own update of trans_start
bpf: bpf_setsockopt: reset sock dst on SO_MARK changes
leds: lp5523: fix a missing check of return value of lp55xx_read
hwmon: (tmp421) Correct the misspelling of the tmp442 compatible attribute in OF device ID table
atm: he: fix sign-extension overflow on large shift
selftests/bpf: retry tests that expect build-id
bpf: zero out build_id for BPF_STACK_BUILD_ID_IP
bpf: don't assume build-id length is always 20 bytes
afs: Fix key refcounting in file locking code
afs: Don't set vnode->cb_s_break in afs_validate()
selftests: tc-testing: fix parsing of ife type
selftests: tc-testing: fix tunnel_key failure if dst_port is unspecified
selftests: tc-testing: drop test on missing tunnel key id
pvcalls-front: fix potential null dereference
drm/sun4i: backend: add missing of_node_puts
vhost: return EINVAL if iovecs size does not match the message size
drm/amd/display: fix PME notification not working in RV desktop
drm/amdkfd: Don't assign dGPUs to APU topology devices
drm/meson: add missing of_node_put
always clear the X2APIC_ENABLE bit for PV guest
netfilter: nft_flow_offload: fix checking method of conntrack helper
scsi: cxgb4i: add wait_for_completion()
scsi: ufs: Fix geometry descriptor size
scsi: qedi: Add ep_state for login completion on un-reachable targets
scsi: ufs: Fix system suspend status
scsi: tcmu: avoid cmd/qfull timers updated whenever a new cmd comes
isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
net: stmmac: Prevent RX starvation in stmmac_napi_poll()
net: stmmac: Fix the logic of checking if RX Watchdog must be enabled
net: stmmac: Check if CBS is supported before configuring
net: stmmac: dwxgmac2: Only clear interrupts that are active
net: stmmac: Fix PCI module removal leak
acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id()
powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool.
RDMA/mthca: Clear QP objects during their allocation
netfilter: nft_flow_offload: fix interaction with vrf slave device
bpf: fix panic in stack_map_get_build_id() on i386 and arm32
pvcalls-front: Avoid get_free_pages(GFP_KERNEL) under spinlock
bpf: correctly set initial window on active Fast Open sender
netfilter: nft_flow_offload: Fix reverse route lookup
MIPS: jazz: fix 64bit build
include/linux/compiler*.h: fix OPTIMIZER_HIDE_VAR
scsi: isci: initialize shost fully before calling scsi_add_host()
scsi: qla4xxx: check return code of qla4xxx_copy_from_fwddb_param
netfilter: nf_tables: fix leaking object reference count
selftests: forwarding: Add a test for VLAN deletion
mlxsw: spectrum_acl: Add cleanup after C-TCAM update error condition
xprtrdma: Double free in rpcrdma_sendctxs_create()
MIPS: ath79: Enable OF serial ports in the default config
net/mlx4: Get rid of page operation after dma_alloc_coherent
watchdog: mt7621_wdt/rt2880_wdt: Fix compilation problem
selftests/bpf: Test [::] -> [::1] rewrite in sys_sendmsg in test_sock_addr
bpf: Fix [::] -> [::1] rewrite in sys_sendmsg
net: hns: Fix use after free identified by SLUB debug
qed: Fix qed_ll2_post_rx_buffer_notify_fw() by adding a write memory barrier
qed: Fix qed_chain_set_prod() for PBL chains with non power of 2 page count
xen/pvcalls: remove set but not used variable 'intf'
mfd: mc13xxx: Fix a missing check of a register-read failure
mfd: tps65218: Use devm_regmap_add_irq_chip and clean up error path in probe()
mfd: cros_ec_dev: Add missing mfd_remove_devices() call in remove
mfd: axp20x: Add supported cells for AXP803
mfd: axp20x: Re-align MFD cell entries
mfd: axp20x: Add AC power supply cell for AXP813
mfd: wm5110: Add missing ASRC rate register
mfd: qcom_rpm: write fw_version to CTRL_REG
mfd: bd9571mwv: Add volatile register to make DVFS work
mfd: ab8500-core: Return zero in get_register_interruptible()
mfd: mt6397: Do not call irq_domain_remove if PMIC unsupported
mfd: db8500-prcmu: Fix some section annotations
mfd: twl-core: Fix section annotations on {,un}protect_pm_master
pvcalls-back: set -ENOTCONN in pvcalls_conn_back_read
pvcalls-front: properly allocate sk
pvcalls-front: don't try to free unallocated rings
pvcalls-front: read all data before closing the connection
mfd: ti_am335x_tscadc: Use PLATFORM_DEVID_AUTO while registering mfd cells
backlight: pwm_bl: Fix devicetree parsing with auto-generated brightness tables
KEYS: allow reaching the keys quotas exactly
ALSA: hda/realtek: Disable PC beep in passthrough on alc285
ALSA: hda/realtek - Headset microphone and internal speaker support for System76 oryp5
proc, oom: do not report alien mms when setting oom_score_adj
numa: change get_mempolicy() to use nr_node_ids instead of MAX_NUMNODES
ceph: avoid repeatedly adding inode to mdsc->snap_flush_list
libceph: handle an empty authorize reply
mac80211: Free mpath object when rhashtable insertion fails
mac80211: Use linked list instead of rhashtable walk for mesh tables
mac80211: Restore vif beacon interval if start ap fails
gpio: pxa: avoid attempting to set pin direction via pinctrl on MMP2
gpio: MT7621: use a per instance irq_chip structure
MIPS: eBPF: Always return sign extended 32b values
tracing: Fix number of entries in trace header
ARM: 8834/1: Fix: kprobes: optimized kprobes illegal instruction
Change-Id: Ie585d8274f881ac87155e9deda341c43cd8923b4
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
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Michael S. Tsirkin
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4047a7ad3b |
include/linux/compiler*.h: fix OPTIMIZER_HIDE_VAR
[ Upstream commit 3e2ffd655cc6a694608d997738989ff5572a8266 ] Since commit |
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Masahiro Yamada
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1859acb7d3 |
compiler.h: give up __compiletime_assert_fallback()
__compiletime_assert_fallback() is supposed to stop building earlier
by using the negative-array-size method in case the compiler does not
support "error" attribute, but has never worked like that.
You can simply try:
BUILD_BUG_ON(1);
GCC immediately terminates the build, but Clang does not report
anything because Clang does not support the "error" attribute now.
It will later fail at link time, but __compiletime_assert_fallback()
is not working at least.
The root cause is commit
|
||
|
Ard Biesheuvel
|
7290d58095 |
module: use relative references for __ksymtab entries
An ordinary arm64 defconfig build has ~64 KB worth of __ksymtab entries, each consisting of two 64-bit fields containing absolute references, to the symbol itself and to a char array containing its name, respectively. When we build the same configuration with KASLR enabled, we end up with an additional ~192 KB of relocations in the .init section, i.e., one 24 byte entry for each absolute reference, which all need to be processed at boot time. Given how the struct kernel_symbol that describes each entry is completely local to module.c (except for the references emitted by EXPORT_SYMBOL() itself), we can easily modify it to contain two 32-bit relative references instead. This reduces the size of the __ksymtab section by 50% for all 64-bit architectures, and gets rid of the runtime relocations entirely for architectures implementing KASLR, either via standard PIE linking (arm64) or using custom host tools (x86). Note that the binary search involving __ksymtab contents relies on each section being sorted by symbol name. This is implemented based on the input section names, not the names in the ksymtab entries, so this patch does not interfere with that. Given that the use of place-relative relocations requires support both in the toolchain and in the module loader, we cannot enable this feature for all architectures. So make it dependent on whether CONFIG_HAVE_ARCH_PREL32_RELOCATIONS is defined. Link: http://lkml.kernel.org/r/20180704083651.24360-4-ard.biesheuvel@linaro.org Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Jessica Yu <jeyu@kernel.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Will Deacon <will.deacon@arm.com> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morris <james.morris@microsoft.com> Cc: James Morris <jmorris@namei.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Nicolas Pitre <nico@linaro.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Russell King <linux@armlinux.org.uk> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Rasmus Villemoes
|
203583990c |
linux/compiler.h: don't use bool
Appararently, it's possible to have a non-trivial TU include a few
headers, including linux/build_bug.h, without ending up with
linux/types.h. So the 0day bot sent me
config: um-x86_64_defconfig (attached as .config)
>> include/linux/compiler.h:316:3: error: unknown type name 'bool'; did you mean '_Bool'?
bool __cond = !(condition); \
for something I'm working on.
Rather than contributing to the #include madness and including
linux/types.h from compiler.h, just use int.
Link: http://lkml.kernel.org/r/20180817101036.20969-1-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Christopher Li <sparse@chrisli.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
|
Mikulas Patocka
|
2026d35741 |
branch-check: fix long->int truncation when profiling branches
The function __builtin_expect returns long type (see the gcc
documentation), and so do macros likely and unlikely. Unfortunatelly, when
CONFIG_PROFILE_ANNOTATED_BRANCHES is selected, the macros likely and
unlikely expand to __branch_check__ and __branch_check__ truncates the
long type to int. This unintended truncation may cause bugs in various
kernel code (we found a bug in dm-writecache because of it), so it's
better to fix __branch_check__ to return long.
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1805300818140.24812@file01.intranet.prod.int.rdu2.redhat.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: stable@vger.kernel.org
Fixes:
|
||
|
Arnd Bergmann
|
173a3efd3e |
bug.h: work around GCC PR82365 in BUG()
Looking at functions with large stack frames across all architectures led me discovering that BUG() suffers from the same problem as fortify_panic(), which I've added a workaround for already. In short, variables that go out of scope by calling a noreturn function or __builtin_unreachable() keep using stack space in functions afterwards. A workaround that was identified is to insert an empty assembler statement just before calling the function that doesn't return. I'm adding a macro "barrier_before_unreachable()" to document this, and insert calls to that in all instances of BUG() that currently suffer from this problem. The files that saw the largest change from this had these frame sizes before, and much less with my patch: fs/ext4/inode.c:82:1: warning: the frame size of 1672 bytes is larger than 800 bytes [-Wframe-larger-than=] fs/ext4/namei.c:434:1: warning: the frame size of 904 bytes is larger than 800 bytes [-Wframe-larger-than=] fs/ext4/super.c:2279:1: warning: the frame size of 1160 bytes is larger than 800 bytes [-Wframe-larger-than=] fs/ext4/xattr.c:146:1: warning: the frame size of 1168 bytes is larger than 800 bytes [-Wframe-larger-than=] fs/f2fs/inode.c:152:1: warning: the frame size of 1424 bytes is larger than 800 bytes [-Wframe-larger-than=] net/netfilter/ipvs/ip_vs_core.c:1195:1: warning: the frame size of 1068 bytes is larger than 800 bytes [-Wframe-larger-than=] net/netfilter/ipvs/ip_vs_core.c:395:1: warning: the frame size of 1084 bytes is larger than 800 bytes [-Wframe-larger-than=] net/netfilter/ipvs/ip_vs_ftp.c:298:1: warning: the frame size of 928 bytes is larger than 800 bytes [-Wframe-larger-than=] net/netfilter/ipvs/ip_vs_ftp.c:418:1: warning: the frame size of 908 bytes is larger than 800 bytes [-Wframe-larger-than=] net/netfilter/ipvs/ip_vs_lblcr.c:718:1: warning: the frame size of 960 bytes is larger than 800 bytes [-Wframe-larger-than=] drivers/net/xen-netback/netback.c:1500:1: warning: the frame size of 1088 bytes is larger than 800 bytes [-Wframe-larger-than=] In case of ARC and CRIS, it turns out that the BUG() implementation actually does return (or at least the compiler thinks it does), resulting in lots of warnings about uninitialized variable use and leaving noreturn functions, such as: block/cfq-iosched.c: In function 'cfq_async_queue_prio': block/cfq-iosched.c:3804:1: error: control reaches end of non-void function [-Werror=return-type] include/linux/dmaengine.h: In function 'dma_maxpq': include/linux/dmaengine.h:1123:1: error: control reaches end of non-void function [-Werror=return-type] This makes them call __builtin_trap() instead, which should normally dump the stack and kill the current process, like some of the other architectures already do. I tried adding barrier_before_unreachable() to panic() and fortify_panic() as well, but that had very little effect, so I'm not submitting that patch. Vineet said: : For ARC, it is double win. : : 1. Fixes 3 -Wreturn-type warnings : : | ../net/core/ethtool.c:311:1: warning: control reaches end of non-void function : [-Wreturn-type] : | ../kernel/sched/core.c:3246:1: warning: control reaches end of non-void function : [-Wreturn-type] : | ../include/linux/sunrpc/svc_xprt.h:180:1: warning: control reaches end of : non-void function [-Wreturn-type] : : 2. bloat-o-meter reports code size improvements as gcc elides the : generated code for stack return. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365 Link: http://lkml.kernel.org/r/20171219114112.939391-1-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Vineet Gupta <vgupta@synopsys.com> [arch/arc] Tested-by: Vineet Gupta <vgupta@synopsys.com> [arch/arc] Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Christopher Li <sparse@chrisli.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kees Cook <keescook@chromium.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Will Deacon <will.deacon@arm.com> Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
178e834c47 |
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu: "This fixes the following issues: - oversize stack frames on mn10300 in sha3-generic - warning on old compilers in sha3-generic - API error in sun4i_ss_prng - potential dead-lock in sun4i_ss_prng - null-pointer dereference in sha512-mb - endless loop when DECO acquire fails in caam - kernel oops when hashing empty message in talitos" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: sun4i_ss_prng - convert lock to _bh in sun4i_ss_prng_generate crypto: sun4i_ss_prng - fix return value of sun4i_ss_prng_generate crypto: caam - fix endless loop when DECO acquire fails crypto: sha3-generic - Use __optimize to support old compilers compiler-gcc.h: __nostackprotector needs gcc-4.4 and up compiler-gcc.h: Introduce __optimize function attribute crypto: sha3-generic - deal with oversize stack frames crypto: talitos - fix Kernel Oops on hashing an empty file crypto: sha512-mb - initialize pending lengths correctly |
||
|
Geert Uytterhoeven
|
df5d45aa08 |
compiler-gcc.h: Introduce __optimize function attribute
Create a new function attribute __optimize, which allows to specify an optimization level on a per-function basis. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
||
|
Andrey Ryabinin
|
7f1e541fc8 |
compiler.h: Add read_word_at_a_time() function.
Sometimes we know that it's safe to do potentially out-of-bounds access because we know it won't cross a page boundary. Still, KASAN will report this as a bug. Add read_word_at_a_time() function which is supposed to be used in such cases. In read_word_at_a_time() KASAN performs relaxed check - only the first byte of access is validated. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Andrey Ryabinin
|
bdb5ac801a |
compiler.h, kasan: Avoid duplicating __read_once_size_nocheck()
Instead of having two identical __read_once_size_nocheck() functions with different attributes, consolidate all the difference in new macro __no_kasan_or_inline and use it. No functional changes. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Mark Rutland
|
b899a85043 |
compiler.h: Remove ACCESS_ONCE()
There are no longer any kernelspace uses of ACCESS_ONCE(), so we can remove the definition from <linux/compiler.h>. This patch removes the ACCESS_ONCE() definition, and updates comments which referred to it. At the same time, some inconsistent and redundant whitespace is removed from comments. Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: apw@canonical.com Link: http://lkml.kernel.org/r/20171127103824.36526-4-mark.rutland@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Ingo Molnar
|
050ab10a64 |
Merge branch 'linus' into core/objtool, to pick up dependent commits
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Josh Poimboeuf
|
10259821ac |
objtool: Make unreachable annotation inline asms explicitly volatile
Add 'volatile' to the unreachable annotation macro inline asm statements. They're already implicitly volatile because they don't have output constraints, but it's clearer and more robust to make them explicitly volatile. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/28659257b7a6adf4a7f65920dad70b2b0226e996.1509974104.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Josh Poimboeuf
|
d0c2e691d1 |
objtool: Add a comment for the unreachable annotation macros
Add a comment for the unreachable annotation macros to explain their purpose and the '__COUNTER__' label hack. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1570e48d9f87e0fc6f0126c32e7e1de6e109cb67.1509974104.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Ingo Molnar
|
8c5db92a70 |
Merge branch 'linus' into locking/core, to resolve conflicts
Conflicts: include/linux/compiler-clang.h include/linux/compiler-gcc.h include/linux/compiler-intel.h include/uapi/linux/stddef.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Josh Poimboeuf
|
ec1e1b6109 |
objtool: Prevent GCC from merging annotate_unreachable(), take 2
This fixes the following warning with GCC 4.6: mm/migrate.o: warning: objtool: migrate_misplaced_transhuge_page()+0x71: unreachable instruction The problem is that the compiler merged identical annotate_unreachable() inline asm blocks, resulting in a missing 'unreachable' annotation. This problem happened before, and was partially fixed with: |
||
|
Greg Kroah-Hartman
|
b24413180f |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Will Deacon
|
59ecbbe7b3 |
locking/barriers: Kill lockless_dereference()
lockless_dereference() is a nice idea, but it gained little traction in kernel code since its introduction three years ago. This is partly because it's a pain to type, but also because using READ_ONCE() instead has worked correctly on all architectures apart from Alpha, which is a fully supported but somewhat niche architecture these days. Now that READ_ONCE() has been upgraded to contain an implicit smp_read_barrier_depends() and the few callers of lockless_dereference() have been converted, we can remove lockless_dereference() altogether. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1508840570-22169-5-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Will Deacon
|
76ebbe78f7 |
locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()
In preparation for the removal of lockless_dereference(), which is the same as READ_ONCE() on all architectures other than Alpha, add an implicit smp_read_barrier_depends() to READ_ONCE() so that it can be used to head dependency chains on all architectures. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1508840570-22169-3-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Will Deacon
|
d15155824c |
linux/compiler.h: Split into compiler.h and compiler_types.h
linux/compiler.h is included indirectly by linux/types.h via
uapi/linux/types.h -> uapi/linux/posix_types.h -> linux/stddef.h
-> uapi/linux/stddef.h and is needed to provide a proper definition of
offsetof.
Unfortunately, compiler.h requires a definition of
smp_read_barrier_depends() for defining lockless_dereference() and soon
for defining READ_ONCE(), which means that all
users of READ_ONCE() will need to include asm/barrier.h to avoid splats
such as:
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from arch/h8300/kernel/asm-offsets.c:11:
include/linux/list.h: In function 'list_empty':
>> include/linux/compiler.h:343:2: error: implicit declaration of function 'smp_read_barrier_depends' [-Werror=implicit-function-declaration]
smp_read_barrier_depends(); /* Enforce dependency ordering from x */ \
^
A better alternative is to include asm/barrier.h in linux/compiler.h,
but this requires a type definition for "bool" on some architectures
(e.g. x86), which is defined later by linux/types.h. Type "bool" is also
used directly in linux/compiler.h, so the whole thing is pretty fragile.
This patch splits compiler.h in two: compiler_types.h contains type
annotations, definitions and the compiler-specific parts, whereas
compiler.h #includes compiler-types.h and additionally defines macros
such as {READ,WRITE.ACCESS}_ONCE().
uapi/linux/stddef.h and linux/linkage.h are then moved over to include
linux/compiler_types.h, which fixes the build for h8 and blackfin.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1508840570-22169-2-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
||
|
Linus Torvalds
|
b1b6f83ac9 |
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm changes from Ingo Molnar:
"PCID support, 5-level paging support, Secure Memory Encryption support
The main changes in this cycle are support for three new, complex
hardware features of x86 CPUs:
- Add 5-level paging support, which is a new hardware feature on
upcoming Intel CPUs allowing up to 128 PB of virtual address space
and 4 PB of physical RAM space - a 512-fold increase over the old
limits. (Supercomputers of the future forecasting hurricanes on an
ever warming planet can certainly make good use of more RAM.)
Many of the necessary changes went upstream in previous cycles,
v4.14 is the first kernel that can enable 5-level paging.
This feature is activated via CONFIG_X86_5LEVEL=y - disabled by
default.
(By Kirill A. Shutemov)
- Add 'encrypted memory' support, which is a new hardware feature on
upcoming AMD CPUs ('Secure Memory Encryption', SME) allowing system
RAM to be encrypted and decrypted (mostly) transparently by the
CPU, with a little help from the kernel to transition to/from
encrypted RAM. Such RAM should be more secure against various
attacks like RAM access via the memory bus and should make the
radio signature of memory bus traffic harder to intercept (and
decrypt) as well.
This feature is activated via CONFIG_AMD_MEM_ENCRYPT=y - disabled
by default.
(By Tom Lendacky)
- Enable PCID optimized TLB flushing on newer Intel CPUs: PCID is a
hardware feature that attaches an address space tag to TLB entries
and thus allows to skip TLB flushing in many cases, even if we
switch mm's.
(By Andy Lutomirski)
All three of these features were in the works for a long time, and
it's coincidence of the three independent development paths that they
are all enabled in v4.14 at once"
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (65 commits)
x86/mm: Enable RCU based page table freeing (CONFIG_HAVE_RCU_TABLE_FREE=y)
x86/mm: Use pr_cont() in dump_pagetable()
x86/mm: Fix SME encryption stack ptr handling
kvm/x86: Avoid clearing the C-bit in rsvd_bits()
x86/CPU: Align CR3 defines
x86/mm, mm/hwpoison: Clear PRESENT bit for kernel 1:1 mappings of poison pages
acpi, x86/mm: Remove encryption mask from ACPI page protection type
x86/mm, kexec: Fix memory corruption with SME on successive kexecs
x86/mm/pkeys: Fix typo in Documentation/x86/protection-keys.txt
x86/mm/dump_pagetables: Speed up page tables dump for CONFIG_KASAN=y
x86/mm: Implement PCID based optimization: try to preserve old TLB entries using PCID
x86: Enable 5-level paging support via CONFIG_X86_5LEVEL=y
x86/mm: Allow userspace have mappings above 47-bit
x86/mm: Prepare to expose larger address space to userspace
x86/mpx: Do not allow MPX if we have mappings above 47-bit
x86/mm: Rename tasksize_32bit/64bit to task_size_32bit/64bit()
x86/xen: Redefine XEN_ELFNOTE_INIT_P2M using PUD_SIZE * PTRS_PER_PUD
x86/mm/dump_pagetables: Fix printout of p4d level
x86/mm/dump_pagetables: Generalize address normalization
x86/boot: Fix memremap() related build failure
...
|
||
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Linus Torvalds
|
b0c79f49c3 |
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar: - Introduce the ORC unwinder, which can be enabled via CONFIG_ORC_UNWINDER=y. The ORC unwinder is a lightweight, Linux kernel specific debuginfo implementation, which aims to be DWARF done right for unwinding. Objtool is used to generate the ORC unwinder tables during build, so the data format is flexible and kernel internal: there's no dependency on debuginfo created by an external toolchain. The ORC unwinder is almost two orders of magnitude faster than the (out of tree) DWARF unwinder - which is important for perf call graph profiling. It is also significantly simpler and is coded defensively: there has not been a single ORC related kernel crash so far, even with early versions. (knock on wood!) But the main advantage is that enabling the ORC unwinder allows CONFIG_FRAME_POINTERS to be turned off - which speeds up the kernel measurably: With frame pointers disabled, GCC does not have to add frame pointer instrumentation code to every function in the kernel. The kernel's .text size decreases by about 3.2%, resulting in better cache utilization and fewer instructions executed, resulting in a broad kernel-wide speedup. Average speedup of system calls should be roughly in the 1-3% range - measurements by Mel Gorman [1] have shown a speedup of 5-10% for some function execution intense workloads. The main cost of the unwinder is that the unwinder data has to be stored in RAM: the memory cost is 2-4MB of RAM, depending on kernel config - which is a modest cost on modern x86 systems. Given how young the ORC unwinder code is it's not enabled by default - but given the performance advantages the plan is to eventually make it the default unwinder on x86. See Documentation/x86/orc-unwinder.txt for more details. - Remove lguest support: its intended role was that of a temporary proof of concept for virtualization, plus its removal will enable the reduction (removal) of the paravirt API as well, so Rusty agreed to its removal. (Juergen Gross) - Clean up and fix FSGS related functionality (Andy Lutomirski) - Clean up IO access APIs (Andy Shevchenko) - Enhance the symbol namespace (Jiri Slaby) * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits) objtool: Handle GCC stack pointer adjustment bug x86/entry/64: Use ENTRY() instead of ALIGN+GLOBAL for stub32_clone() x86/fpu/math-emu: Add ENDPROC to functions x86/boot/64: Extract efi_pe_entry() from startup_64() x86/boot/32: Extract efi_pe_entry() from startup_32() x86/lguest: Remove lguest support x86/paravirt/xen: Remove xen_patch() objtool: Fix objtool fallthrough detection with function padding x86/xen/64: Fix the reported SS and CS in SYSCALL objtool: Track DRAP separately from callee-saved registers objtool: Fix validate_branch() return codes x86: Clarify/fix no-op barriers for text_poke_bp() x86/switch_to/64: Rewrite FS/GS switching yet again to fix AMD CPUs selftests/x86/fsgsbase: Test selectors 1, 2, and 3 x86/fsgsbase/64: Report FSBASE and GSBASE correctly in core dumps x86/fsgsbase/64: Fully initialize FS and GS state in start_thread_common x86/asm: Fix UNWIND_HINT_REGS macro for older binutils x86/asm/32: Fix regs_get_register() on segment registers x86/xen/64: Rearrange the SYSCALL entries x86/asm/32: Remove a bunch of '& 0xffff' from pt_regs segment reads ... |
||
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Joe Stringer
|
c03567a8e8 |
include/linux/compiler.h: don't perform compiletime_assert with -O0
Commit |
||
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Ingo Molnar
|
413d63d71b |
Merge branch 'linus' into x86/mm to pick up fixes and to fix conflicts
Conflicts: arch/x86/kernel/head64.c arch/x86/mm/mmap.c Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
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Ingo Molnar
|
1d0f49e140 |
Merge branch 'x86/urgent' into x86/asm, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
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Josh Poimboeuf
|
649ea4d5a6 |
objtool: Assume unannotated UD2 instructions are dead ends
Arnd reported some false positive warnings with GCC 7: drivers/hid/wacom_wac.o: warning: objtool: wacom_bpt3_touch()+0x2a5: stack state mismatch: cfa1=7+8 cfa2=6+16 drivers/iio/adc/vf610_adc.o: warning: objtool: vf610_adc_calculate_rates() falls through to next function vf610_adc_sample_set() drivers/pwm/pwm-hibvt.o: warning: objtool: hibvt_pwm_get_state() falls through to next function hibvt_pwm_remove() drivers/pwm/pwm-mediatek.o: warning: objtool: mtk_pwm_config() falls through to next function mtk_pwm_enable() drivers/spi/spi-bcm2835.o: warning: objtool: .text: unexpected end of section drivers/spi/spi-bcm2835aux.o: warning: objtool: .text: unexpected end of section drivers/watchdog/digicolor_wdt.o: warning: objtool: dc_wdt_get_timeleft() falls through to next function dc_wdt_restart() When GCC 7 detects a potential divide-by-zero condition, it sometimes inserts a UD2 instruction for the case where the divisor is zero, instead of letting the hardware trap on the divide instruction. Objtool doesn't consider UD2 to be fatal unless it's annotated with unreachable(). So it considers the GCC-generated UD2 to be non-fatal, and it tries to follow the control flow past the UD2 and gets confused. Previously, objtool *did* assume UD2 was always a dead end. That changed with the following commit: |
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Kees Cook
|
aa5d1b8150 |
x86/asm: Add ASM_UNREACHABLE
This creates an unreachable annotation in asm for CONFIG_STACK_VALIDATION=y. While here, adjust earlier uses of \t\n into \n\t. Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@infradead.org> Cc: David S. Miller <davem@davemloft.net> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Elena Reshetova <elena.reshetova@intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: James Bottomley <James.Bottomley@hansenpartnership.com> Cc: Jann Horn <jannh@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: arozansk@redhat.com Cc: axboe@kernel.dk Cc: kernel-hardening@lists.openwall.com Cc: linux-arch <linux-arch@vger.kernel.org> Link: http://lkml.kernel.org/r/1500921349-10803-3-git-send-email-keescook@chromium.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
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Linus Torvalds
|
e06fdaf40a |
Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull structure randomization updates from Kees Cook:
"Now that IPC and other changes have landed, enable manual markings for
randstruct plugin, including the task_struct.
This is the rest of what was staged in -next for the gcc-plugins, and
comes in three patches, largest first:
- mark "easy" structs with __randomize_layout
- mark task_struct with an optional anonymous struct to isolate the
__randomize_layout section
- mark structs to opt _out_ of automated marking (which will come
later)
And, FWIW, this continues to pass allmodconfig (normal and patched to
enable gcc-plugins) builds of x86_64, i386, arm64, arm, powerpc, and
s390 for me"
* tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
randstruct: opt-out externally exposed function pointer structs
task_struct: Allow randomized layout
randstruct: Mark various structs for randomization
|
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Tom Lendacky
|
7375ae3a0b |
compiler-gcc.h: Introduce __nostackprotector function attribute
Create a new function attribute, __nostackprotector, that can used to turn off stack protection on a per function basis. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/0576fd5c74440ad0250f16ac6609ecf587812456.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
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Linus Torvalds
|
59005b0c59 |
Merge tag 'gcc-plugins-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull GCC plugin updates from Kees Cook: "The big part is the randstruct plugin infrastructure. This is the first of two expected pull requests for randstruct since there are dependencies in other trees that would be easier to merge once those have landed. Notably, the IPC allocation refactoring in -mm, and many trivial merge conflicts across several trees when applying the __randomize_layout annotation. As a result, it seemed like I should send this now since it is relatively self-contained, and once the rest of the trees have landed, send the annotation patches. I'm expecting the final phase of randstruct (automatic struct selection) will land for v4.14, but if its other tree dependencies actually make it for v4.13, I can send that merge request too. Summary: - typo fix in Kconfig (Jean Delvare) - randstruct infrastructure" * tag 'gcc-plugins-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: ARM: Prepare for randomized task_struct randstruct: Whitelist NIU struct page overloading randstruct: Whitelist big_key path struct overloading randstruct: Whitelist UNIXCB cast randstruct: Whitelist struct security_hook_heads cast gcc-plugins: Add the randstruct plugin Fix English in description of GCC_PLUGIN_STRUCTLEAK compiler: Add __designated_init annotation gcc-plugins: Detail c-common.h location for GCC 4.6 |
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Kees Cook
|
29e48ce87f |
task_struct: Allow randomized layout
This marks most of the layout of task_struct as randomizable, but leaves thread_info and scheduler state untouched at the start, and thread_struct untouched at the end. Other parts of the kernel use unnamed structures, but the 0-day builder using gcc-4.4 blows up on static initializers. Officially, it's documented as only working on gcc 4.6 and later, which further confuses me: https://gcc.gnu.org/wiki/C11Status The structure layout randomization already requires gcc 4.7, but instead of depending on the plugin being enabled, just check the gcc versions for wider build testing. At Linus's suggestion, the marking is hidden in a macro to reduce how ugly it looks. Additionally, indenting is left unchanged since it would make things harder to read. Randomization of task_struct is modified from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on my understanding of the code. Changes or omissions from the original code are mine and don't reflect the original grsecurity/PaX code. Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Kees Cook <keescook@chromium.org> |
||
|
Kees Cook
|
313dd1b629 |
gcc-plugins: Add the randstruct plugin
This randstruct plugin is modified from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on my understanding of the code. Changes or omissions from the original code are mine and don't reflect the original grsecurity/PaX code. The randstruct GCC plugin randomizes the layout of selected structures at compile time, as a probabilistic defense against attacks that need to know the layout of structures within the kernel. This is most useful for "in-house" kernel builds where neither the randomization seed nor other build artifacts are made available to an attacker. While less useful for distribution kernels (where the randomization seed must be exposed for third party kernel module builds), it still has some value there since now all kernel builds would need to be tracked by an attacker. In more performance sensitive scenarios, GCC_PLUGIN_RANDSTRUCT_PERFORMANCE can be selected to make a best effort to restrict randomization to cacheline-sized groups of elements, and will not randomize bitfields. This comes at the cost of reduced randomization. Two annotations are defined,__randomize_layout and __no_randomize_layout, which respectively tell the plugin to either randomize or not to randomize instances of the struct in question. Follow-on patches enable the auto-detection logic for selecting structures for randomization that contain only function pointers. It is disabled here to assist with bisection. Since any randomized structs must be initialized using designated initializers, __randomize_layout includes the __designated_init annotation even when the plugin is disabled so that all builds will require the needed initialization. (With the plugin enabled, annotations for automatically chosen structures are marked as well.) The main differences between this implemenation and grsecurity are: - disable automatic struct selection (to be enabled in follow-up patch) - add designated_init attribute at runtime and for manual marking - clarify debugging output to differentiate bad cast warnings - add whitelisting infrastructure - support gcc 7's DECL_ALIGN and DECL_MODE changes (Laura Abbott) - raise minimum required GCC version to 4.7 Earlier versions of this patch series were ported by Michael Leibowitz. Signed-off-by: Kees Cook <keescook@chromium.org> |
||
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Paul E. McKenney
|
41a2901e7d |
rcu: Remove SPARSE_RCU_POINTER Kconfig option
The sparse-based checking for non-RCU accesses to RCU-protected pointers has been around for a very long time, and it is now the only type of sparse-based checking that is optional. This commit therefore makes it unconditional. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Fengguang Wu <fengguang.wu@intel.com> |
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Kees Cook
|
0aa5e49c68 |
compiler: Add __designated_init annotation
This allows structure annotations for requiring designated initialization in GCC 5.1.0 and later: https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html The structure randomization layout plugin will be using this to help identify structures that need this form of initialization. Signed-off-by: Kees Cook <keescook@chromium.org> |
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Linus Torvalds
|
86292b33d4 |
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton: - a few MM remainders - misc things - autofs updates - signals - affs updates - ipc - nilfs2 - spelling.txt updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (78 commits) mm, x86: fix HIGHMEM64 && PARAVIRT build config for native_pud_clear() mm: add arch-independent testcases for RODATA hfs: atomically read inode size mm: clarify mm_struct.mm_{users,count} documentation mm: use mmget_not_zero() helper mm: add new mmget() helper mm: add new mmgrab() helper checkpatch: warn when formats use %Z and suggest %z lib/vsprintf.c: remove %Z support scripts/spelling.txt: add some typo-words scripts/spelling.txt: add "followings" pattern and fix typo instances scripts/spelling.txt: add "therfore" pattern and fix typo instances scripts/spelling.txt: add "overwriten" pattern and fix typo instances scripts/spelling.txt: add "overwritting" pattern and fix typo instances scripts/spelling.txt: add "deintialize(d)" pattern and fix typo instances scripts/spelling.txt: add "disassocation" pattern and fix typo instances scripts/spelling.txt: add "omited" pattern and fix typo instances scripts/spelling.txt: add "explictely" pattern and fix typo instances scripts/spelling.txt: add "applys" pattern and fix typo instances scripts/spelling.txt: add "configuartion" pattern and fix typo instances ... |
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Luis R. Rodriguez
|
7d134b2ce6 |
kprobes: move kprobe declarations to asm-generic/kprobes.h
Often all is needed is these small helpers, instead of compiler.h or a full kprobes.h. This is important for asm helpers, in fact even some asm/kprobes.h make use of these helpers... instead just keep a generic asm file with helpers useful for asm code with the least amount of clutter as possible. Likewise we need now to also address what to do about this file for both when architectures have CONFIG_HAVE_KPROBES, and when they do not. Then for when architectures have CONFIG_HAVE_KPROBES but have disabled CONFIG_KPROBES. Right now most asm/kprobes.h do not have guards against CONFIG_KPROBES, this means most architecture code cannot include asm/kprobes.h safely. Correct this and add guards for architectures missing them. Additionally provide architectures that not have kprobes support with the default asm-generic solution. This lets us force asm/kprobes.h on the header include/linux/kprobes.h always, but most importantly we can now safely include just asm/kprobes.h on architecture code without bringing the full kitchen sink of header files. Two architectures already provided a guard against CONFIG_KPROBES on its kprobes.h: sh, arch. The rest of the architectures needed gaurds added. We avoid including any not-needed headers on asm/kprobes.h unless kprobes have been enabled. In a subsequent atomic change we can try now to remove compiler.h from include/linux/kprobes.h. During this sweep I've also identified a few architectures defining a common macro needed for both kprobes and ftrace, that of the definition of the breakput instruction up. Some refer to this as BREAKPOINT_INSTRUCTION. This must be kept outside of the #ifdef CONFIG_KPROBES guard. [mcgrof@kernel.org: fix arm64 build] Link: http://lkml.kernel.org/r/CAB=NE6X1WMByuARS4mZ1g9+W=LuVBnMDnh_5zyN0CLADaVh=Jw@mail.gmail.com [sfr@canb.auug.org.au: fixup for kprobes declarations moving] Link: http://lkml.kernel.org/r/20170214165933.13ebd4f4@canb.auug.org.au Link: http://lkml.kernel.org/r/20170203233139.32682-1-mcgrof@kernel.org Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
79b17ea740 |
Merge tag 'trace-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"This release has no new tracing features, just clean ups, minor fixes
and small optimizations"
* tag 'trace-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (25 commits)
tracing: Remove outdated ring buffer comment
tracing/probes: Fix a warning message to show correct maximum length
tracing: Fix return value check in trace_benchmark_reg()
tracing: Use modern function declaration
jump_label: Reduce the size of struct static_key
tracing/probe: Show subsystem name in messages
tracing/hwlat: Update old comment about migration
timers: Make flags output in the timer_start tracepoint useful
tracing: Have traceprobe_probes_write() not access userspace unnecessarily
tracing: Have COMM event filter key be treated as a string
ftrace: Have set_graph_function handle multiple functions in one write
ftrace: Do not hold references of ftrace_graph_{notrace_}hash out of graph_lock
tracing: Reset parser->buffer to allow multiple "puts"
ftrace: Have set_graph_functions handle write with RDWR
ftrace: Reset fgd->hash in ftrace_graph_write()
ftrace: Replace (void *)1 with a meaningful macro name FTRACE_GRAPH_EMPTY
ftrace: Create a slight optimization on searching the ftrace_hash
tracing: Add ftrace_hash_key() helper function
ftrace: Convert graph filter to use hash tables
ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip
...
|
||
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Steven Rostedt (VMware)
|
134e6a034c |
tracing: Show number of constants profiled in likely profiler
Now that constants are traced, it is useful to see the number of constants that are traced in the likely/unlikely profiler in order to know if they should be ignored or not. The likely/unlikely will display a number after the "correct" number if a "constant" count exists. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
|
Kees Cook
|
c61f13eaa1 |
gcc-plugins: Add structleak for more stack initialization
This plugin detects any structures that contain __user attributes and makes sure it is being fully initialized so that a specific class of information exposure is eliminated. (This plugin was originally designed to block the exposure of siginfo in CVE-2013-2141.) Ported from grsecurity/PaX. This version adds a verbose option to the plugin and the Kconfig. Signed-off-by: Kees Cook <keescook@chromium.org> |
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Steven Rostedt (VMware)
|
d45ae1f704 |
tracing: Process constants for (un)likely() profiler
When running the likely/unlikely profiler, one of the results did not look accurate. It noted that the unlikely() in link_path_walk() was 100% incorrect. When I added a trace_printk() to see what was happening there, it became 80% correct! Looking deeper into what whas happening, I found that gcc split that if statement into two paths. One where the if statement became a constant, the other path a variable. The other path had the if statement always hit (making the unlikely there, always false), but since the #define unlikely() has: #define unlikely() (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0)) Where constants are ignored by the branch profiler, the "constant" path made by the compiler was ignored, even though it was hit 80% of the time. By just passing the constant value to the __branch_check__() function and tracing it out of line (as always correct, as likely/unlikely isn't a factor for constants), then we get back the accurate readings of branches that were optimized by gcc causing part of the execution to become constant. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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Linus Torvalds
|
9ffc66941d |
Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc plugins update from Kees Cook: "This adds a new gcc plugin named "latent_entropy". It is designed to extract as much possible uncertainty from a running system at boot time as possible, hoping to capitalize on any possible variation in CPU operation (due to runtime data differences, hardware differences, SMP ordering, thermal timing variation, cache behavior, etc). At the very least, this plugin is a much more comprehensive example for how to manipulate kernel code using the gcc plugin internals" * tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: latent_entropy: Mark functions with __latent_entropy gcc-plugins: Add latent_entropy plugin |
||
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Linus Torvalds
|
84d69848c9 |
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek: - EXPORT_SYMBOL for asm source by Al Viro. This does bring a regression, because genksyms no longer generates checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is working on a patch to fix this. Plus, we are talking about functions like strcpy(), which rarely change prototypes. - Fixes for PPC fallout of the above by Stephen Rothwell and Nick Piggin - fixdep speedup by Alexey Dobriyan. - preparatory work by Nick Piggin to allow architectures to build with -ffunction-sections, -fdata-sections and --gc-sections - CONFIG_THIN_ARCHIVES support by Stephen Rothwell - fix for filenames with colons in the initramfs source by me. * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits) initramfs: Escape colons in depfile ppc: there is no clear_pages to export powerpc/64: whitelist unresolved modversions CRCs kbuild: -ffunction-sections fix for archs with conflicting sections kbuild: add arch specific post-link Makefile kbuild: allow archs to select link dead code/data elimination kbuild: allow architectures to use thin archives instead of ld -r kbuild: Regenerate genksyms lexer kbuild: genksyms fix for typeof handling fixdep: faster CONFIG_ search ia64: move exports to definitions sparc32: debride memcpy.S a bit [sparc] unify 32bit and 64bit string.h sparc: move exports to definitions ppc: move exports to definitions arm: move exports to definitions s390: move exports to definitions m68k: move exports to definitions alpha: move exports to actual definitions x86: move exports to actual definitions ... |
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Emese Revfy
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0766f788eb |
latent_entropy: Mark functions with __latent_entropy
The __latent_entropy gcc attribute can be used only on functions and variables. If it is on a function then the plugin will instrument it for gathering control-flow entropy. If the attribute is on a variable then the plugin will initialize it with random contents. The variable must be an integer, an integer array type or a structure with integer fields. These specific functions have been selected because they are init functions (to help gather boot-time entropy), are called at unpredictable times, or they have variable loops, each of which provide some level of latent entropy. Signed-off-by: Emese Revfy <re.emese@gmail.com> [kees: expanded commit message] Signed-off-by: Kees Cook <keescook@chromium.org> |
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Nicholas Piggin
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b67067f117 |
kbuild: allow archs to select link dead code/data elimination
Introduce LD_DEAD_CODE_DATA_ELIMINATION option for architectures to
select to build with -ffunction-sections, -fdata-sections, and link
with --gc-sections. It requires some work (documented) to ensure all
unreferenced entrypoints are live, and requires toolchain and build
verification, so it is made a per-arch option for now.
On a random powerpc64le build, this yelds a significant size saving,
it boots and runs fine, but there is a lot I haven't tested as yet, so
these savings may be reduced if there are bugs in the link.
text data bss dec filename
11169741 1180744 1923176 14273661 vmlinux
10445269 1004127 1919707 13369103 vmlinux.dce
~700K text, ~170K data, 6% removed from kernel image size.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
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