Re: futex: use-after-free in futex_wait_requeue_pi

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: futex: use-after-free in futex_wait_requeue_pi
Date	2017-03-13 11:10 +0100
Message-ID	<tkv5p-7pV-31@gated-at.bofh.it> (permalink)
References	<tjxiW-7Ku-29@gated-at.bofh.it> <tktdg-61U-13@gated-at.bofh.it> <tkv5o-7pV-11@gated-at.bofh.it>
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On Mon, Mar 13, 2017 at 11:02 AM, Sebastian Andrzej Siewior
<bigeasy@linutronix.de> wrote:
> On 2017-03-13 09:06:20 [+0100], Peter Zijlstra wrote:
>> On Fri, Mar 10, 2017 at 07:10:30PM +0100, Dmitry Vyukov wrote:
>> > The following program triggers use-after-free in futex_wait_requeue_pi:
>> > https://gist.githubusercontent.com/dvyukov/42e596153263793b75ad587c8d0626b0/raw/35461a6c1b0a4163a67191ff5d35202f35ecbf44/gistfile1.txt
>> There's a known use-after-free there, see:
>> I've not woken up enough; or actually looked at your report to see if
>> its the same.
>
> It seems so, yes. The test-case triggered on the commit mentioned in
> less than a minute and after the patch applied it runs now for 16
> without complains.
> A stable tag would be nice then :)


Yes, looking at the fix, I would expect that it fixes the problem.
Thanks

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futex: use-after-free in futex_wait_requeue_pi Dmitry Vyukov <dvyukov@google.com> - 2017-03-10 19:20 +0100
  Re: futex: use-after-free in futex_wait_requeue_pi Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-03-10 19:40 +0100
    Re: futex: use-after-free in futex_wait_requeue_pi Dmitry Vyukov <dvyukov@google.com> - 2017-03-10 19:40 +0100
  Re: futex: use-after-free in futex_wait_requeue_pi Peter Zijlstra <peterz@infradead.org> - 2017-03-13 09:10 +0100
    Re: futex: use-after-free in futex_wait_requeue_pi Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-03-13 11:10 +0100
      Re: futex: use-after-free in futex_wait_requeue_pi Dmitry Vyukov <dvyukov@google.com> - 2017-03-13 11:10 +0100

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