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SubjectRe: [PATCH] kasan: Respect /proc/sys/kernel/traceoff_on_warning
On Wed, 25 Jan 2017 15:35:32 +0100
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..

Yep,

# echo 1 > /sys/kernel/debug/tracing/tracing_on

Re-enables tracing.

-- Steve

>
> > 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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