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()
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@ -4596,6 +4596,7 @@ void perf_event_comm(struct task_struct *task)
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struct perf_event_context *ctx;
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int ctxn;
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rcu_read_lock();
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for_each_task_context_nr(ctxn) {
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ctx = task->perf_event_ctxp[ctxn];
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if (!ctx)
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@ -4603,6 +4604,7 @@ void perf_event_comm(struct task_struct *task)
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perf_event_enable_on_exec(ctx);
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}
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rcu_read_unlock();
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if (!atomic_read(&nr_comm_events))
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return;
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