On Fri, Sep 22, 2023 at 1:32 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 smu10_voltage_dependency_table. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Evan Quan <evan.quan@xxxxxxx> > 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: Xiaojian Du <Xiaojian.Du@xxxxxxx> > Cc: Huang Rui <ray.huang@xxxxxxx> > Cc: Kevin Wang <kevin1.wang@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/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 >
