Kajol Jain 80e745b672 perf: Fix task_function_call() error handling ...

[ Upstream commit 6d6b8b9f4fceab7266ca03d194f60ec72bd4b654 ]

The error handling introduced by commit:

  2ed6edd33a21 ("perf: Add cond_resched() to task_function_call()")

looses any return value from smp_call_function_single() that is not
{0, -EINVAL}. This is a problem because it will return -EXNIO when the
target CPU is offline. Worse, in that case it'll turn into an infinite
loop.

Fixes: 2ed6edd33a21 ("perf: Add cond_resched() to task_function_call()")
Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Barret Rhoden <brho@google.com>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: https://lkml.kernel.org/r/20200827064732.20860-1-kjain@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-10-14 10:31:26 +02:00

..

bpf

bpf: Fix a rcu warning for bpffs map pretty-print

2020-10-01 13:14:52 +02:00

cgroup

cgroup: add missing skcd->no_refcnt check in cgroup_sk_clone()

2020-08-19 08:14:47 +02:00

configs

…

debug

kgdb: Avoid suspicious RCU usage warning

2020-07-09 09:37:10 +02:00

dma

dma-debug: add a schedule point in debug_dma_dump_mappings()

2020-01-04 19:12:43 +01:00

events

perf: Fix task_function_call() error handling

2020-10-14 10:31:26 +02:00

gcov

gcov: add support for GCC 10.1

2020-09-17 13:45:31 +02:00

irq

genirq/matrix: Deal with the sillyness of for_each_cpu() on UP

2020-09-03 11:24:29 +02:00

livepatch

livepatch: Nullify obj->mod in klp_module_coming()'s error path

2019-10-07 18:57:10 +02:00

locking

locking/lockdep: Fix overflow in presentation of average lock-time

2020-09-03 11:24:21 +02:00

power

PM: hibernate: Freeze kernel threads in software_resume()

2020-05-06 08:13:28 +02:00

printk

printk: handle blank console arguments passed in.

2020-10-01 13:14:45 +02:00

rcu

rcu: Avoid data-race in rcu_gp_fqs_check_wake()

2020-02-11 04:33:55 -08:00

sched

sched: correct SD_flags returned by tl->sd_flags()

2020-08-19 08:14:47 +02:00

time

timekeeping: Prevent 32bit truncation in scale64_check_overflow()

2020-10-01 13:14:36 +02:00

trace

ftrace: Move RCU is watching check after recursion check

2020-10-07 08:00:05 +02:00

.gitignore

…

acct.c

acct_on(): don't mess with freeze protection

2019-05-31 06:46:05 -07:00

async.c

…

audit_fsnotify.c

…

audit_tree.c

audit: Embed key into chunk

2019-12-13 08:51:11 +01:00

audit_watch.c

audit: CONFIG_CHANGE don't log internal bookkeeping as an event

2020-10-01 13:14:33 +02:00

audit.c

audit: fix a net reference leak in audit_list_rules_send()

2020-06-22 09:05:13 +02:00

audit.h

audit: fix a net reference leak in audit_list_rules_send()

2020-06-22 09:05:13 +02:00

auditfilter.c

audit: fix a net reference leak in audit_list_rules_send()

2020-06-22 09:05:13 +02:00

auditsc.c

audit: print empty EXECVE args

2019-12-01 09:17:17 +01:00

backtracetest.c

…

bounds.c

…

capability.c

LSM: generalize flag passing to security_capable

2020-01-23 08:21:29 +01:00

compat.c

make 'user_access_begin()' do 'access_ok()'

2020-06-22 09:04:58 +02:00

configs.c

…

context_tracking.c

…

cpu_pm.c

kernel/cpu_pm: Fix uninitted local in cpu_pm

2020-06-22 09:05:28 +02:00

cpu.c

sched/core: Fix illegal RCU from offline CPUs

2020-06-22 09:05:14 +02:00

crash_core.c

…

crash_dump.c

…

cred.c

memcg: account security cred as well to kmemcg

2020-01-09 10:19:00 +01:00

delayacct.c

…

dma.c

…

elfcore.c

kernel/elfcore.c: include proper prototypes

2019-10-11 18:21:23 +02:00

exec_domain.c

…

exit.c

exit: Move preemption fixup up, move blocking operations down

2020-06-22 09:05:14 +02:00

extable.c

…

fail_function.c

…

fork.c

fork,memcg: alloc_thread_stack_node needs to set tsk->stack

2020-01-27 14:50:58 +01:00

freezer.c

…

futex.c

futex: Unbreak futex hashing

2020-03-25 08:06:14 +01:00

groups.c

…

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:16:02 +02:00

iomem.c

…

irq_work.c

irq_work: Do not raise an IPI when queueing work on the local CPU

2019-05-31 06:46:19 -07:00

jump_label.c

jump_label: move 'asm goto' support test to Kconfig

2019-06-04 08:02:34 +02:00

kallsyms.c

kallsyms: Refactor kallsyms_show_value() to take cred

2020-07-16 08:17:26 +02:00

kcmp.c

…

Kconfig.freezer

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Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

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kcov.c

kernel/kcov.c: mark write_comp_data() as notrace

2019-02-12 19:47:20 +01:00

kexec_core.c

kexec: Allocate decrypted control pages for kdump if SME is enabled

2019-11-24 08:20:29 +01:00

kexec_file.c

…

kexec_internal.h

…

kexec.c

…

kmod.c

kmod: make request_module() return an error when autoloading is disabled

2020-04-17 10:48:52 +02:00

kprobes.c

kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE

2020-10-01 13:14:54 +02:00

ksysfs.c

…

kthread.c

kthread: Do not preempt current task if it is going to call schedule()

2020-08-26 10:31:00 +02:00

latencytop.c

…

Makefile

y2038: futex: Move compat implementation into futex.c

2019-12-01 09:17:38 +01:00

memremap.c

mm/memory_hotplug: shrink zones when offlining memory

2020-01-29 16:43:27 +01:00

module_signing.c

…

module-internal.h

…

module.c

module: Correctly truncate sysfs sections output

2020-08-21 11:05:34 +02:00

notifier.c

x86/mm: split vmalloc_sync_all()

2020-03-25 08:06:13 +01:00

nsproxy.c

…

padata.c

padata: purge get_cpu and reorder_via_wq from padata_do_serial

2020-05-27 17:37:36 +02:00

panic.c

kernel/panic.c: do not append newline to the stack protector panic string

2019-12-01 09:17:10 +01:00

params.c

…

pid_namespace.c

signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig

2019-07-26 09:14:01 +02:00

pid.c

…

profile.c

…

ptrace.c

ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()

2020-01-23 08:21:29 +01:00

range.c

…

reboot.c

…

relay.c

kernel/relay.c: fix memleak on destroy relay channel

2020-08-26 10:30:59 +02:00

resource.c

resource: fix locking in find_next_iomem_res()

2019-09-16 08:22:20 +02:00

rseq.c

…

seccomp.c

LSM: generalize flag passing to security_capable

2020-01-23 08:21:29 +01:00

signal.c

signal: Extend exec_id to 64bits

2020-04-17 10:48:47 +02:00

smp.c

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:47:25 +01:00

smpboot.c

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smpboot.h

…

softirq.c

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stacktrace.c

…

stop_machine.c

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sys_ni.c

…

sys.c

kernel/sys.c: avoid copying possible padding bytes in copy_to_user

2020-10-01 13:14:29 +02:00

sysctl_binary.c

…

sysctl.c

kernel: sysctl: make drop_caches write-only

2020-01-04 19:13:17 +01:00

task_work.c

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taskstats.c

taskstats: fix data-race

2020-01-09 10:18:59 +01:00

test_kprobes.c

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torture.c

…

tracepoint.c

…

tsacct.c

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ucount.c

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uid16.c

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uid16.h

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umh.c

usermodehelper: reset umask to default before executing user process

2020-10-14 10:31:21 +02:00

up.c

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user_namespace.c

…

user-return-notifier.c

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user.c

…

utsname_sysctl.c

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utsname.c

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watchdog_hld.c

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watchdog.c

watchdog/softlockup: Enforce that timestamp is valid on boot

2020-02-24 08:34:49 +01:00

workqueue_internal.h

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workqueue.c

workqueue: don't use wq_select_unbound_cpu() for bound works

2020-03-18 07:14:20 +01:00