Re: [PATCH 2/3] kasan: move kasan_report() into report.c

[Peter Zijlstra]

On Thu, May 28, 2020 at 09:33:41AM -0500, Josh Poimboeuf wrote:
> On Thu, May 28, 2020 at 09:49:13AM -0400, Qian Cai wrote:
> > On Tue, May 12, 2020 at 05:33:20PM +0200, 'Andrey Konovalov' via kasan-dev wrote:
> > > The kasan_report() functions belongs to report.c, as it's a common
> > > functions that does error reporting.
> > > 
> > > Reported-by: Leon Romanovsky <leon@xxxxxxxxxx>
> > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> > 
> > Today's linux-next produced this with Clang 11.
> > 
> > mm/kasan/report.o: warning: objtool: kasan_report()+0x8a: call to __stack_chk_fail() with UACCESS enabled
> > 
> > kasan_report at mm/kasan/report.c:536
> 
> Peter, this was also reported with GCC about a month ago.  Should we add
> __stack_chk_fail() to the uaccess safe list?

It calls panic(), which I suppose is pretty safe, it kills the entire
machine dead :-)

Ok.