diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-22 10:32:12 -0700 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2023-10-05 11:30:50 +0200 |
| commit | 25765dde572b2266c4619d85ef0b3aeb47e24f13 (patch) | |
| tree | eb8b3c6829bc61107247cef4a1e64d9582ca5f27 /drivers/gpu/drm/virtio | |
| parent | b16cc13baca7381737e2656c0095f787328a44b4 (diff) | |
drm/virtio: Annotate struct virtio_gpu_object_array with __counted_by
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 virtio_gpu_object_array.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: David Airlie <airlied@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Cc: Chia-I Wu <olvaffe@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230922173216.3823169-7-keescook@chromium.org
Diffstat (limited to 'drivers/gpu/drm/virtio')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_drv.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 8513b671f871..96365a772f77 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -119,7 +119,7 @@ struct virtio_gpu_object_array { struct ww_acquire_ctx ticket; struct list_head next; u32 nents, total; - struct drm_gem_object *objs[]; + struct drm_gem_object *objs[] __counted_by(total); }; struct virtio_gpu_vbuffer; |