Messages in this thread | | | Date | Mon, 29 Sep 2014 14:07:22 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] fork.c: copy_process(): fix cleanup WRT perf_event_free_task() |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> Subject: perf: Fix perf bug in fork() > > Oleg noticed that a cleanup by Sylvain actually uncovered a bug; by > calling perf_event_free_task() when failing sched_fork() we will not yet > have done the memset() on ->perf_event_ctxp[] and will therefore try and > 'free' the inherited contexts, which are still in use by the parent > process. This is bad.. > > Suggested-by: Oleg Nesterov <oleg@redhat.com> > Reported-by: Oleg Nesterov <oleg@redhat.com> > Reported-by: Sylvain 'ythier' Hitier <sylvain.hitier@gmail.com> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Could this fix a couple of fuzzer triggered perf crashes perhaps?
Thanks,
Ingo
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