Re: use-after-free in __perf_install_in_context

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: use-after-free in __perf_install_in_context
Date	2015-12-31 18:20 +0100
Message-ID	<qLP3k-7gO-13@gated-at.bofh.it> (permalink)
References	(6 earlier) <qGHpM-py-5@gated-at.bofh.it> <qGHJ9-Ah-31@gated-at.bofh.it> <qGHJ9-Ah-29@gated-at.bofh.it> <qGHSN-EG-5@gated-at.bofh.it> <qGI2t-IG-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Dec 17, 2015 at 3:43 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Thu, Dec 17, 2015 at 03:35:32PM +0100, Dmitry Vyukov wrote:
>> In short, I did not see use-after-frees but perf_event_open fuzzing
>> started hanging VMs very frequently, so testing is inconclusive.
>
> Right, I'll get back to staring at that one.
>
> Running your test case on bare metal got my machine reproducably stuck
> but in a different place than you've reported.
>
> Takes a while too, so far no luck in explaining/debugging it. All my
> added debug code remains silent :/
>
> I'll go think up more ..

Hi Peter,

Any progress with this?
I can't continue to test perf subsytem, as it reliably hangs my machines.
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Thread

Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-17 15:10 +0100
  Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-17 15:10 +0100
    Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-17 15:30 +0100
      Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-17 15:40 +0100
        Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-17 15:50 +0100
          Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-31 18:20 +0100
            Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2016-01-05 13:20 +0100
              Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2016-01-08 09:50 +0100
                Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2016-01-08 11:30 +0100
    Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-17 15:30 +0100

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