On Fri, Sep 22, 2023 at 1:32 PM Kees Cook <keesc...@chromium.org> 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
> smu10_voltage_dependency_table.
>
> [1]
> https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Evan Quan <evan.q...@amd.com>
> Cc: Alex Deucher <alexander.deuc...@amd.com>
> Cc: "Christian König" <christian.koe...@amd.com>
> Cc: "Pan, Xinhui" <xinhui....@amd.com>
> Cc: David Airlie <airl...@gmail.com>
> Cc: Daniel Vetter <dan...@ffwll.ch>
> Cc: Xiaojian Du <xiaojian...@amd.com>
> Cc: Huang Rui <ray.hu...@amd.com>
> Cc: Kevin Wang <kevin1.w...@amd.com>
> Cc: amd-...@lists.freedesktop.org
> Cc: dri-de...@lists.freedesktop.org
> Signed-off-by: Kees Cook <keesc...@chromium.org>
Acked-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> index 808e0ecbe1f0..42adc2a3dcbc 100644
> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> @@ -192,7 +192,7 @@ struct smu10_clock_voltage_dependency_record {
>
> struct smu10_voltage_dependency_table {
> uint32_t count;
> - struct smu10_clock_voltage_dependency_record entries[];
> + struct smu10_clock_voltage_dependency_record entries[]
> __counted_by(count);
> };
>
> struct smu10_clock_voltage_information {
> --
> 2.34.1
>
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