Re: Possible incorrect handling of fault injection inside KMSAN instrumentation

[Dipanjan Das]

On Wed, Apr 12, 2023 at 7:39 AM Alexander Potapenko <glider@xxxxxxxxxx> wrote:

> Here are two patches that fix the problem:
>  - https://github.com/google/kmsan/commit/b793a6d5a1c1258326b0f53d6e3ac8aa3eeb3499
> - for kmsan_vmap_pages_range_noflush();
>  - https://github.com/google/kmsan/commit/cb9e33e0cd7ff735bc302ff69c02274f24060cff
> - for kmsan_ioremap_page_range()
>
> Can you please try them out?

The second patch needs a small modification.

The return value of `__vmap_pages_range_noflush` at Line 181
(https://github.com/google/kmsan/commit/cb9e33e0cd7ff735bc302ff69c02274f24060cff#diff-6c23520766ef70571c16b74ed93474716645c7ba81dc07028c076b6fd5ad2731R181)
should also be assigned to `mapped`. With this modification, the patch
works.

-- 
Thanks and Regards,

Dipanjan