On Mon, 29 Sep 2014 16:00:48 +0200 Peter Zijlstra <pet...@infradead.org> wrote:
> On Mon, Sep 29, 2014 at 02:07:22PM +0200, Ingo Molnar wrote: > > > > * Peter Zijlstra <pet...@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 <o...@redhat.com> > > > Reported-by: Oleg Nesterov <o...@redhat.com> > > > Reported-by: Sylvain 'ythier' Hitier <sylvain.hit...@gmail.com> > > > Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> > > > > Could this fix a couple of fuzzer triggered perf crashes perhaps? > > It could indeed I suppose.. you never know what paths those fuzzers > manage to hit. The patch isn't in linux-next and didn't cc stable. I think I'll squirt it Linuswards later this week unless someone stops me.. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
