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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 2015-12-08 18:00 +0100
Message-ID <qDtMm-4Ra-13@gated-at.bofh.it> (permalink)
References <qC4Q2-7mV-23@gated-at.bofh.it> <qDtjk-4FX-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Dec 8, 2015 at 5:27 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, Dec 04, 2015 at 09:04:35PM +0100, Dmitry Vyukov wrote:
>
>> I was able to reproduce it by
>> restricting syscalls only to perf_event_open, perf ioctls and bpf
>> syscall.
>
> Does that include cpu hotplug?

I have CONFIG_HOTPLUG_CPU enabled. But I don't do actual plug/unplug.


> Sasha just reminded me there is a swevent use-after-free issue on
> hotplug.
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Thread

use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-04 21:10 +0100
  Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-04 21:40 +0100
    Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-04 22:10 +0100
      Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-07 12:10 +0100
        Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-07 12:10 +0100
          Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-07 12:30 +0100
  Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-07 16:40 +0100
    Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-07 17:10 +0100
      Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-08 04:30 +0100
        Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-08 17:20 +0100
          Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-08 19:00 +0100
            Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-08 19:00 +0100
              Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-08 19:10 +0100
                Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-08 19:40 +0100
                Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-08 21:00 +0100
                Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-09 10:20 +0100
                Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-10 05:00 +0100
                Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-10 10:10 +0100
                Re: use-after-free in __perf_install_in_context Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-12-10 18:10 +0100
                Re: use-after-free in __perf_install_in_context Ingo Molnar <mingo@kernel.org> - 2015-12-11 09:20 +0100
      Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-08 17:50 +0100
        Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-08 20:20 +0100
          Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-10 21:00 +0100
  Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-08 17:30 +0100
    Re: use-after-free in __perf_install_in_context Dmitry Vyukov <dvyukov@google.com> - 2015-12-08 18:00 +0100
  Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-08 17:30 +0100
    Re: use-after-free in __perf_install_in_context Ingo Molnar <mingo@kernel.org> - 2015-12-08 20:00 +0100
      Re: use-after-free in __perf_install_in_context Peter Zijlstra <peterz@infradead.org> - 2015-12-09 10:10 +0100

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