On Mon, Sep 25, 2023 at 2:30 AM Christian König <christian.koenig@xxxxxxx> wrote: > > Am 22.09.23 um 19:41 schrieb Alex Deucher: > > 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> > > Mhm, I'm not sure if this is a good idea. That is a structure filled in > by the firmware, isn't it? > > That would imply that we might need to byte swap count before it is > checkable. True. Good point. Same for the other amdgpu patch. Alex > > Regards, > Christian. > > > > >> --- > >> 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 > >> >
