[PATCH v2] drm/fb-helper: add virtual screen size check to drm_fb_helper_check_var()

[Geert Uytterhoeven]

Hi Andrey,

On Thu, Aug 11, 2022 at 4:49 PM Andrey Strachuk <strochuk at ispras.ru> wrote:
> Add virtual screen size check to drm_fb_helper_check_var() in
> order to validate userspace input.
>
> Found by Linux Verification Center (linuxtesting.org) with syzkaller.
>
> Signed-off-by: Andrey Strachuk <strochuk at ispras.ru>

Thanks for the update!

> Fixes: 785b93ef8c30 ("drm/kms: move driver specific fb common code to helper functions (v2)")

I'd drop the Fixes tag completely, as the bug was present in the
intel and radeon drivers before. But probably it doesn't matter, as no one
is gonna backport this to v2.6.31 and earlier ;-)

Reviewed-by: Geert Uytterhoeven <geert at linux-m68k.org>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds