Re: [PATCH] kasan: Disable branch tracing for core runtime

[Andrew Morton]

On Tue, 19 May 2020 23:05:46 +0200 Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote:

> On Tue, May 19, 2020 at 8:25 PM Marco Elver <elver@xxxxxxxxxx> wrote:
> >
> > During early boot, while KASAN is not yet initialized, it is possible to
> > enter reporting code-path and end up in kasan_report(). While
> > uninitialized, the branch there prevents generating any reports,
> > however, under certain circumstances when branches are being traced
> > (TRACE_BRANCH_PROFILING), we may recurse deep enough to cause kernel
> > reboots without warning.
> >
> > To prevent similar issues in future, we should disable branch tracing
> > for the core runtime.
> >
> 
> ...
>
> Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>

Thanks, I queued this for 5.7.