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 <bske...@redhat.com> Cc: Karol Herbst <kher...@redhat.com> Cc: Lyude Paul <ly...@redhat.com> Cc: David Airlie <airl...@gmail.com> Cc: Daniel Vetter <dan...@ffwll.ch> Cc: dri-de...@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- 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 { -- 2.34.1
