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Re: [PATCH 1/2] unwind: prevent KASAN false positive warnings in guess unwinder

From Ingo Molnar <mingo@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH 1/2] unwind: prevent KASAN false positive warnings in guess unwinder
Date 2016-11-18 09:40 +0100
Message-ID <sEMSd-4GA-29@gated-at.bofh.it> (permalink)
References <sE88q-3gV-19@gated-at.bofh.it> <sEyvU-3yz-15@gated-at.bofh.it> <sEBtL-5wM-5@gated-at.bofh.it>
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* Josh Poimboeuf <jpoimboe@redhat.com> wrote:

> On Thu, Nov 17, 2016 at 09:57:23AM -0600, Josh Poimboeuf wrote:
> > The guess unwinder scans the entire stack, which can cause KASAN
> > "stack-out-of-bounds" false positive warnings.  Tell KASAN to ignore it.
> > 
> > Reported-by: Peter Zijlstra <peterz@infradead.org>
> > Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
> 
> Whoops, forgot to prefix the patch subjects with "x86/".

No problem, fixed it up.

Thanks,

	Ingo

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Thread

perf: fuzzer KASAN unwind_get_return_address Vince Weaver <vincent.weaver@maine.edu> - 2016-11-15 18:50 +0100
  Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-15 20:00 +0100
    Re: perf: fuzzer KASAN unwind_get_return_address Vince Weaver <vincent.weaver@maine.edu> - 2016-11-15 20:10 +0100
      Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-15 22:00 +0100
        Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-16 14:10 +0100
          Re: perf: fuzzer KASAN unwind_get_return_address Dmitry Vyukov <dvyukov@google.com> - 2016-11-16 14:20 +0100
          Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-16 15:40 +0100
            Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-16 16:00 +0100
            Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-16 16:00 +0100
              Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 05:50 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-17 10:20 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 18:10 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Vince Weaver <vincent.weaver@maine.edu> - 2016-11-17 18:20 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Dmitry Vyukov <dvyukov@google.com> - 2016-11-17 18:50 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 18:40 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Vince Weaver <vincent.weaver@maine.edu> - 2016-11-17 19:20 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-17 18:20 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-17 18:20 +0100
                [tip:perf/urgent] perf/x86/intel: Cure bogus unwind from PEBS  entries tip-bot for Peter Zijlstra <tipbot@zytor.com> - 2016-11-22 13:40 +0100
                Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 18:50 +0100
            Re: perf: fuzzer KASAN unwind_get_return_address Peter Zijlstra <peterz@infradead.org> - 2016-11-16 16:00 +0100
              Re: perf: fuzzer KASAN unwind_get_return_address Vince Weaver <vincent.weaver@maine.edu> - 2016-11-16 16:10 +0100
          [PATCH 1/2] unwind: prevent KASAN false positive warnings in guess unwinder Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 18:20 +0100
            Re: [PATCH 1/2] unwind: prevent KASAN false positive warnings in  guess unwinder Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 21:30 +0100
              Re: [PATCH 1/2] unwind: prevent KASAN false positive warnings in  guess unwinder Ingo Molnar <mingo@kernel.org> - 2016-11-18 09:40 +0100
            [tip:x86/urgent] x86/unwind: Prevent KASAN false positive warnings  in guess unwinder tip-bot for Josh Poimboeuf <tipbot@zytor.com> - 2016-11-18 10:10 +0100
          [PATCH 2/2] dumpstack: prevent KASAN false positive warnings Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-17 18:20 +0100
            [tip:x86/urgent] x86/dumpstack: Prevent KASAN false positive  warnings tip-bot for Josh Poimboeuf <tipbot@zytor.com> - 2016-11-18 10:10 +0100
    Re: perf: fuzzer KASAN unwind_get_return_address Dmitry Vyukov <dvyukov@google.com> - 2016-11-15 20:10 +0100
      Re: perf: fuzzer KASAN unwind_get_return_address Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-15 22:00 +0100

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