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i2som-imx-linux/kernel
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Barret Rhoden e81b05e535 perf: Add cond_resched() to task_function_call() 
commit 2ed6edd33a upstream.

Under rare circumstances, task_function_call() can repeatedly fail and
cause a soft lockup.

There is a slight race where the process is no longer running on the cpu
we targeted by the time remote_function() runs.  The code will simply
try again.  If we are very unlucky, this will continue to fail, until a
watchdog fires.  This can happen in a heavily loaded, multi-core virtual
machine.

Reported-by: syzbot+bb4935a5c09b5ff79940@syzkaller.appspotmail.com
Signed-off-by: Barret Rhoden <brho@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200414222920.121401-1-brho@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-17 16:40:36 +02:00
..
bpf
bpf: Support llvm-objcopy for vmlinux BTF
2020-06-17 16:40:20 +02:00
cgroup
Revert "cgroup: Add memory barriers to plug cgroup_rstat_updated() race window"
2020-06-07 13:18:46 +02:00
configs
…
debug
kgdb: don't use a notifier to enter kgdb at panic; call directly
2019-09-25 17:51:40 -07:00
dma
dma-direct: fix data truncation in dma_direct_get_required_mask()
2020-04-29 16:33:00 +02:00
events
perf: Add cond_resched() to task_function_call()
2020-06-17 16:40:36 +02:00
gcov
kernel/gcov/fs.c: gcov_seq_next() should increase position index
2020-04-29 16:33:00 +02:00
irq
genirq/debugfs: Add missing sanity checks to interrupt injection
2020-04-17 10:50:11 +02:00
livepatch
…
locking
locktorture: Print ratio of acquisitions, not failures
2020-04-23 10:36:44 +02:00
power
PM: hibernate: Freeze kernel threads in software_resume()
2020-05-06 08:15:09 +02:00
printk
printk: queue wake_up_klogd irq_work only if per-CPU areas are ready
2020-05-02 08:48:42 +02:00
rcu
rcu: Allow only one expedited GP to run concurrently with wakeups
2020-03-05 16:43:50 +01:00
sched
sched/fair: Don't NUMA balance for kthreads
2020-06-17 16:40:21 +02:00
time
time/sched_clock: Expire timer in hardirq context
2020-04-17 10:50:02 +02:00
trace
Stop the ad-hoc games with -Wno-maybe-initialized
2020-05-20 08:20:28 +02:00
.gitignore
…
acct.c
…
async.c
…
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
audit_get_nd(): don't unlock parent too early
2019-11-10 11:56:55 -05:00
audit.c
audit: check the length of userspace generated audit records
2020-04-29 16:33:18 +02:00
audit.h
…
auditfilter.c
audit: fix error handling in audit_data_to_entry()
2020-03-05 16:43:42 +01:00
auditsc.c
…
backtracetest.c
…
bounds.c
…
capability.c
…
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/hotplug: Ignore pm_wakeup_pending() for disable_nonboot_cpus()
2020-04-17 10:50:11 +02:00
crash_core.c
…
crash_dump.c
…
cred.c
keys: Fix request_key() cache
2020-01-17 19:48:42 +01:00
delayacct.c
…
dma.c
…
elfcore.c
kernel/elfcore.c: include proper prototypes
2019-09-25 17:51:39 -07:00
exec_domain.c
…
exit.c
exit: panic before exit_mm() on global init exit
2020-01-09 10:20:01 +01:00
extable.c
…
fail_function.c
…
fork.c
fork: prevent accidental access to clone3 features
2020-05-20 08:20:22 +02:00
freezer.c
Revert "libata, freezer: avoid block device removal while system is frozen"
2019-10-06 09:11:37 -06:00
futex.c
futex: Unbreak futex hashing
2020-03-25 08:25:58 +01:00
gen_kheaders.sh
kheaders: substituting --sort in archive creation
2019-10-17 09:08:19 +09:00
groups.c
…
hung_task.c
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iomem.c
…
irq_work.c
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jump_label.c
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kallsyms.c
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kcmp.c
…
Kconfig.freezer
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Kconfig.hz
…
Kconfig.locks
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Kconfig.preempt
…
kcov.c
…
kexec_core.c
kexec: bail out upon SIGKILL when allocating memory.
2019-09-25 17:51:40 -07:00
kexec_elf.c
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kexec_file.c
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
kexec_internal.h
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kexec.c
…
kheaders.c
…
kmod.c
kmod: make request_module() return an error when autoloading is disabled
2020-04-17 10:50:22 +02:00
kprobes.c
kprobes: Fix optimize_kprobe()/unoptimize_kprobe() cancellation logic
2020-03-12 13:00:09 +01:00
ksysfs.c
…
kthread.c
kthread: make __kthread_queue_delayed_work static
2019-10-16 09:20:58 -07:00
latencytop.c
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Makefile
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2019-09-27 19:37:27 -07:00
module_signature.c
…
module_signing.c
…
module-internal.h
…
module.c
module: avoid setting info->name early in case we can fall back to info->mod->name
2020-02-24 08:36:54 +01:00
notifier.c
x86/mm: split vmalloc_sync_all()
2020-03-25 08:25:58 +01:00
nsproxy.c
…
padata.c
padata: add separate cpuhp node for CPUHP_PADATA_DEAD
2020-06-17 16:40:22 +02:00
panic.c
panic: ensure preemption is disabled during panic()
2019-10-07 15:47:19 -07:00
params.c
…
pid_namespace.c
…
pid.c
…
profile.c
…
ptrace.c
ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()
2020-01-23 08:22:36 +01:00
range.c
…
reboot.c
…
relay.c
kernel/relay.c: handle alloc_percpu returning NULL in relay_open
2020-06-07 13:18:47 +02:00
resource.c
mm/memory_hotplug.c: use PFN_UP / PFN_DOWN in walk_system_ram_range()
2019-09-24 15:54:09 -07:00
rseq.c
…
seccomp.c
seccomp: Add missing compat_ioctl for notify
2020-04-17 10:50:09 +02:00
signal.c
signal: check sig before setting info in kill_pid_usb_asyncio
2020-05-02 08:48:55 +02:00
smp.c
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smpboot.c
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smpboot.h
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softirq.c
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stackleak.c
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stacktrace.c
stacktrace: Don't skip first entry on noncurrent tasks
2019-11-04 21:19:25 +01:00
stop_machine.c
stop_machine: Avoid potential race behaviour
2019-10-17 12:47:12 +02:00
sys_ni.c
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sys.c
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sysctl_binary.c
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sysctl.c
kernel: sysctl: make drop_caches write-only
2020-01-04 19:18:32 +01:00
task_work.c
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taskstats.c
taskstats: fix data-race
2020-01-09 10:19:54 +01:00
test_kprobes.c
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torture.c
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tracepoint.c
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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
umh: fix memory leak on execve failure
2020-05-20 08:20:13 +02:00
up.c
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user_namespace.c
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user-return-notifier.c
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user.c
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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 08:36:52 +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 07:17:50 +01:00