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

Linus Torvalds
2019-02-27T17:36:35Z

On Wed, Feb 27, 2019 at 9:30 AM Peter Zijlstra <peterz@infradead.org> wrote:
>
> Right, but I was hoping to avoid having to do that; and I think we can
> do that if we push all of kasan_report into an exception, like that
> 'patch' I just posted.
>
> If I'm not mistaken the regular kasan house-keeping crud just prods at
> the shadow memory with simple code and should be perfectly safe.

Fair enough. I do agree it would be nice to not have the save/restore
simply because "it cannot matter" and we have the static tool to prove
that.

Linus