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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-27 10:08:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-27 10:08:09 -0700 |
| commit | e09d13c4c8805546d97bcc8c508c07f7d8f4c8e8 (patch) | |
| tree | 49304cce7cbc67dd188bd35183b89f664343ec27 | |
| parent | d7d7271f421f1e45289f2a737c7f636c02c673ce (diff) | |
| parent | c79aa0d96548aee50570209eb2d45c8f4ac49230 (diff) | |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Ingo Molnar:
"This fix adds missing RCU read protection"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
events: Protect access via task_subsys_state_check()
| -rw-r--r-- | kernel/events/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 4d3124b3927..9fcb0944f07 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4596,6 +4596,7 @@ void perf_event_comm(struct task_struct *task) struct perf_event_context *ctx; int ctxn; + rcu_read_lock(); for_each_task_context_nr(ctxn) { ctx = task->perf_event_ctxp[ctxn]; if (!ctx) @@ -4603,6 +4604,7 @@ void perf_event_comm(struct task_struct *task) perf_event_enable_on_exec(ctx); } + rcu_read_unlock(); if (!atomic_read(&nr_comm_events)) return; |