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Kajol Jain 269e274250 perf: Fix task_function_call() error handling 
[ Upstream commit 6d6b8b9f4f ]

The error handling introduced by commit:

  2ed6edd33a ("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: 2ed6edd33a ("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 09:51:14 +02:00
..
bpf
bpf: Remove recursion prevention from rcu free callback
2020-10-01 13:12:35 +02:00
cgroup
cgroup: add missing skcd->no_refcnt check in cgroup_sk_clone()
2020-08-21 09:48:02 +02:00
configs
…
debug
kgdb: Avoid suspicious RCU usage warning
2020-07-09 09:36:30 +02:00
events
perf: Fix task_function_call() error handling
2020-10-14 09:51:14 +02:00
gcov
gcov: add support for GCC 10.1
2020-09-23 10:46:32 +02:00
irq
genirq/affinity: Make affinity setting if activated opt-in
2020-08-21 09:48:23 +02:00
livepatch
livepatch: Nullify obj->mod in klp_module_coming()'s error path
2019-10-07 18:55:09 +02:00
locking
locking/lockdep: Fix overflow in presentation of average lock-time
2020-09-03 11:22:27 +02:00
power
PM: hibernate: Freeze kernel threads in software_resume()
2020-05-05 19:15:50 +02:00
printk
printk: handle blank console arguments passed in.
2020-10-01 13:12:45 +02:00
rcu
…
sched
sched: correct SD_flags returned by tl->sd_flags()
2020-08-21 09:48:02 +02:00
time
timekeeping: Prevent 32bit truncation in scale64_check_overflow()
2020-10-01 13:12:36 +02:00
trace
ftrace: Move RCU is watching check after recursion check
2020-10-14 09:51:11 +02:00
.gitignore
…
acct.c
…
async.c
…
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
audit: CONFIG_CHANGE don't log internal bookkeeping as an event
2020-10-01 13:12:33 +02:00
audit.c
audit: fix a net reference leak in audit_list_rules_send()
2020-06-20 10:25:10 +02:00
audit.h
audit: fix a net reference leak in audit_list_rules_send()
2020-06-20 10:25:10 +02:00
auditfilter.c
audit: fix a net reference leak in audit_list_rules_send()
2020-06-20 10:25:10 +02:00
auditsc.c
audit: print empty EXECVE args
2019-12-01 09:14:03 +01:00
backtracetest.c
…
bounds.c
…
capability.c
…
compat.c
make 'user_access_begin()' do 'access_ok()'
2020-06-20 10:24:58 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
kernel/cpu_pm: Fix uninitted local in cpu_pm
2020-06-20 10:25:19 +02:00
cpu.c
x86/speculation: Remove redundant arch_smt_update() invocation
2020-04-24 08:00:41 +02:00
crash_core.c
…
crash_dump.c
…
cred.c
memcg: account security cred as well to kmemcg
2020-01-09 10:17:54 +01:00
delayacct.c
…
dma.c
…
elfcore.c
kernel/elfcore.c: include proper prototypes
2019-10-11 18:18:42 +02:00
exec_domain.c
…
exit.c
exit: Move preemption fixup up, move blocking operations down
2020-06-20 10:25:10 +02:00
extable.c
…
fork.c
futex: Split futex_mm_release() for exit/exec
2019-12-05 15:38:26 +01:00
freezer.c
…
futex.c
futex: Unbreak futex hashing
2020-04-02 16:34:21 +02:00
groups.c
…
hung_task.c
…
irq_work.c
…
jump_label.c
…
kallsyms.c
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
2019-09-21 07:15:38 +02:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
…
kexec_core.c
kexec: Allocate decrypted control pages for kdump if SME is enabled
2019-11-24 08:23:15 +01:00
kexec_file.c
…
kexec_internal.h
…
kexec.c
…
kmod.c
kmod: make request_module() return an error when autoloading is disabled
2020-04-24 08:00:44 +02:00
kprobes.c
kprobes: Fix to check probe enabled before disarm_kprobe_ftrace()
2020-10-01 13:12:51 +02:00
ksysfs.c
…
kthread.c
…
latencytop.c
…
Makefile
y2038: futex: Move compat implementation into futex.c
2019-12-05 15:38:22 +01:00
memremap.c
…
module_signing.c
…
module-internal.h
…
module.c
kernel/module: Fix memleak in module_add_modinfo_attrs()
2020-02-14 16:32:06 -05:00
notifier.c
x86/mm: split vmalloc_sync_all()
2020-04-02 16:34:20 +02:00
nsproxy.c
…
padata.c
padata: purge get_cpu and reorder_via_wq from padata_do_serial
2020-05-27 16:43:05 +02:00
panic.c
panic: ensure preemption is disabled during panic()
2019-10-17 13:43:19 -07:00
params.c
…
pid_namespace.c
signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig
2019-07-31 07:28:21 +02:00
pid.c
…
profile.c
…
ptrace.c
ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()
2020-01-23 08:20:32 +01:00
range.c
…
reboot.c
…
relay.c
kernel/relay.c: fix memleak on destroy relay channel
2020-08-26 10:29:54 +02:00
resource.c
…
seccomp.c
…
signal.c
signal: Extend exec_id to 64bits
2020-04-24 08:00:38 +02:00
smp.c
…
smpboot.c
…
smpboot.h
…
softirq.c
…
stacktrace.c
…
stop_machine.c
…
sys_ni.c
…
sys.c
kernel/sys.c: avoid copying possible padding bytes in copy_to_user
2020-10-01 13:12:30 +02:00
sysctl_binary.c
…
sysctl.c
kernel: sysctl: make drop_caches write-only
2020-01-04 13:59:57 +01:00
task_work.c
…
taskstats.c
taskstats: fix data-race
2020-01-09 10:17:53 +01:00
test_kprobes.c
…
torture.c
…
tracepoint.c
…
tsacct.c
…
ucount.c
…
uid16.c
…
umh.c
usermodehelper: reset umask to default before executing user process
2020-10-14 09:51:10 +02:00
up.c
…
user_namespace.c
…
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
…
watchdog_hld.c
…
watchdog.c
watchdog/softlockup: Enforce that timestamp is valid on boot
2020-02-28 16:36:05 +01:00
workqueue_internal.h
…
workqueue.c
workqueue: don't use wq_select_unbound_cpu() for bound works
2020-03-20 10:54:16 +01:00