Messages in this thread | | | From | Alexander Shishkin <> | Subject | Re: [PATCH] perf: Fix race between close() and fork() | Date | Tue, 25 Jun 2019 15:20:33 +0300 |
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Peter Zijlstra <peterz@infradead.org> writes:
> Solve it by using the fact that detached events still have a reference > count on their (previous) context. With this perf_event_free_task() > can detect when events have escaped and wait for their destruction. > > Cc: Mark Rutland <mark.rutland@arm.com> > Fixes: 82d94856fa22 ("perf/core: Fix lock inversion between perf,trace,cpuhp") > Reported-by: syzbot+a24c397a29ad22d86c98@syzkaller.appspotmail.com > Debugged-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Regards, -- Alex
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