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

From	Peter Zijlstra <peterz@infradead.org>
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-25@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>
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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.

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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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