Re: [PATCH 5/6] objtool: Add UACCESS validation

Peter Zijlstra
2019-02-27T14:33:35Z

On Wed, Feb 27, 2019 at 03:26:23PM +0100, Peter Zijlstra wrote:
> On Wed, Feb 27, 2019 at 05:17:58PM +0300, Andrey Ryabinin wrote:
> >
> >
> > On 2/27/19 5:08 PM, Peter Zijlstra wrote:
>
> > > I can't actually find any definitions of those functions, so I can't
> > > very well mark the safe, even if we wanted to.
> > >
> >
> > They are macro-generated. Use 'git grep DEFINE_ASAN'
>
> Ah, indeed! I'll go have a look.

Urgh, kasan_report() is definitely unsafe. Now, admitedly we should
'never' hit that, but it does leave us up a creek without a paddle.

Not sure what to do here; best I can come up with atm. is kill SMAP on
KASAN builds.