Commit-ID: e5aeee51f6b4fb22e851105ee6d8ad211c40a214
Gitweb: http://git.kernel.org/tip/e5aeee51f6b4fb22e851105ee6d8ad211c40a214
Author: Alexander Levin <alexander.levin@xxxxxxxxxxx>
AuthorDate: Sat, 3 Jun 2017 03:39:13 +0000
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 3 Jun 2017 09:28:45 +0200
perf/core: Don't release cred_guard_mutex if not taken
If we failed to acquire task's cred_guard_mutex we shouldn't proceed
to release it in the error path.
Fixes: a63fbed776c ("perf/tracing/cpuhotplug: Fix locking order")
Signed-off-by: Alexander Levin <alexander.levin@xxxxxxxxxxx>
Cc: peterz@xxxxxxxxxxxxx
Cc: rostedt@xxxxxxxxxxx
Cc: mathieu.desnoyers@xxxxxxxxxxxx
Cc: mhiramat@xxxxxxxxxx
Cc: paulmck@xxxxxxxxxxxxxxxxxx
Cc: bigeasy@xxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20170603033903.12056-1-alexander.levin@xxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/events/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index b97cda4..1f1b8cd 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9878,7 +9878,7 @@ SYSCALL_DEFINE5(perf_event_open,
if (task) {
err = mutex_lock_interruptible(&task->signal->cred_guard_mutex);
if (err)
- goto err_cred;
+ goto err_task;
/*
* Reuse ptrace permission checks for now.
--
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