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

[Peter Zijlstra]

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.