Reviewed-by: Lyude Paul <[email protected]>
Thanks!
On Fri, 2023-09-22 at 10:32 -0700, Kees Cook wrote:
> Prepare for the coming implementation by GCC and Clang of the __counted_by
> attribute. Flexible array members annotated with __counted_by can have
> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
>
> As found with Coccinelle[1], add __counted_by for struct nvkm_perfdom.
>
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Ben Skeggs <[email protected]>
> Cc: Karol Herbst <[email protected]>
> Cc: Lyude Paul <[email protected]>
> Cc: David Airlie <[email protected]>
> Cc: Daniel Vetter <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Signed-off-by: Kees Cook <[email protected]>
> ---
> drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h b/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h
> index 6ae25d3e7f45..c011227f7052 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h
> +++ b/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h
> @@ -82,7 +82,7 @@ struct nvkm_perfdom {
> u8 mode;
> u32 clk;
> u16 signal_nr;
> - struct nvkm_perfsig signal[];
> + struct nvkm_perfsig signal[] __counted_by(signal_nr);
> };
>
> struct nvkm_funcdom {
--
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat