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 ivpu_job. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jacek Lawrynowicz <jacek.lawrynow...@linux.intel.com> Cc: Stanislaw Gruszka <stanislaw.grus...@linux.intel.com> Cc: Oded Gabbay <ogab...@kernel.org> Cc: Nathan Chancellor <nat...@kernel.org> Cc: Nick Desaulniers <ndesaulni...@google.com> Cc: Tom Rix <t...@redhat.com> Cc: dri-devel@lists.freedesktop.org Cc: l...@lists.linux.dev Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/accel/ivpu/ivpu_job.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/accel/ivpu/ivpu_job.h b/drivers/accel/ivpu/ivpu_job.h index aa1f0b9479b0..5514c2d8a609 100644 --- a/drivers/accel/ivpu/ivpu_job.h +++ b/drivers/accel/ivpu/ivpu_job.h @@ -51,7 +51,7 @@ struct ivpu_job { u32 job_id; u32 engine_idx; size_t bo_count; - struct ivpu_bo *bos[]; + struct ivpu_bo *bos[] __counted_by(bo_count); }; int ivpu_submit_ioctl(struct drm_device *dev, void *data, struct drm_file *file); -- 2.34.1
