| Message ID | 20230922173216.3823169-5-keescook@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Annotate structs with __counted_by | expand |
Reviewed-by: Lyude Paul <lyude@redhat.com> Thanks! On Fri, 2023-09-22 at 10:32 -0700, Kees Cook 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 nvkm_perfdom. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Ben Skeggs <bskeggs@redhat.com> > Cc: Karol Herbst <kherbst@redhat.com> > Cc: Lyude Paul <lyude@redhat.com> > Cc: David Airlie <airlied@gmail.com> > Cc: Daniel Vetter <daniel@ffwll.ch> > Cc: dri-devel@lists.freedesktop.org > Cc: nouveau@lists.freedesktop.org > Signed-off-by: Kees Cook <keescook@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 {
On 9/22/23 11:32, Kees Cook 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 nvkm_perfdom. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Ben Skeggs <bskeggs@redhat.com> > Cc: Karol Herbst <kherbst@redhat.com> > Cc: Lyude Paul <lyude@redhat.com> > Cc: David Airlie <airlied@gmail.com> > Cc: Daniel Vetter <daniel@ffwll.ch> > Cc: dri-devel@lists.freedesktop.org > Cc: nouveau@lists.freedesktop.org > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks
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 {
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 <bskeggs@redhat.com> Cc: Karol Herbst <kherbst@redhat.com> Cc: Lyude Paul <lyude@redhat.com> Cc: David Airlie <airlied@gmail.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)