On Fri, Sep 22, 2023 at 1:33 PM Kees Cook <keescook@xxxxxxxxxxxx> 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 ip_hw_instance. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Alex Deucher <alexander.deucher@xxxxxxx> > Cc: "Christian König" <christian.koenig@xxxxxxx> > Cc: "Pan, Xinhui" <Xinhui.Pan@xxxxxxx> > Cc: David Airlie <airlied@xxxxxxxxx> > Cc: Daniel Vetter <daniel@xxxxxxxx> > Cc: Hawking Zhang <Hawking.Zhang@xxxxxxx> > Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > index d1bc7b212520..be4c97a3d7bf 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c > @@ -662,7 +662,7 @@ struct ip_hw_instance { > u8 harvest; > > int num_base_addresses; > - u32 base_addr[]; > + u32 base_addr[] __counted_by(num_base_addresses); > }; > > struct ip_hw_id { > -- > 2.34.1 >
