Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning

From	Alexander Potapenko <glider@google.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning
Date	2017-01-25 15:40 +0100
Message-ID	<t3wTU-2VB-23@gated-at.bofh.it> (permalink)
References	<t3wKd-2S1-3@gated-at.bofh.it> <t3wKd-2S1-1@gated-at.bofh.it> <t3wTT-2VB-17@gated-at.bofh.it> <t3wTU-2VB-25@gated-at.bofh.it>
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On Wed, Jan 25, 2017 at 3:35 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, Jan 25, 2017 at 03:32:11PM +0100, Alexander Potapenko wrote:
>
>> > @@ -300,6 +301,8 @@ void kasan_report(unsigned long addr, size_t size,
>> >         if (likely(!kasan_report_enabled()))
>> >                 return;
>> >
>> > +       disable_trace_on_warning();
>> > +
>> Who is going to enable tracing back after we're done?
>
> The user..
>
>> Note that KASAN errors are not fatal, and the first one may possibly
>> occur quite early.
>
> WARN*() isn't fatal either, and it does the same thing. Note that
> traceoff_on_warning is default disabled. You have to explicitly request
> this.
Ah, that makes sense. Sorry, I wasn't aware of that interface before.



-- 
Alexander Potapenko
Software Engineer

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Thread

Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning Peter Zijlstra <peterz@infradead.org> - 2017-01-25 15:30 +0100
  Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning Alexander Potapenko <glider@google.com> - 2017-01-25 15:40 +0100
    Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning Alexander Potapenko <glider@google.com> - 2017-01-25 15:40 +0100
    Re: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning Peter Zijlstra <peterz@infradead.org> - 2017-01-25 15:40 +0100

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