On 22.09.2023 19:32, 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 perf_series.
[1]
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Jani Nikula <jani.nik...@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursu...@linux.intel.com>
Cc: David Airlie <airl...@gmail.com>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: John Harrison <john.c.harri...@intel.com>
Cc: Andi Shyti <andi.sh...@linux.intel.com>
Cc: Matthew Brost <matthew.br...@intel.com>
Cc: intel-...@lists.freedesktop.org
Cc: dri-de...@lists.freedesktop.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
I am surprised this is the only finding in i915, I would expected more.
Anyway:
Reviewed-by: Andrzej Hajda <andrzej.ha...@intel.com>
Regards
Andrzej
---
drivers/gpu/drm/i915/selftests/i915_request.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c
b/drivers/gpu/drm/i915/selftests/i915_request.c
index a9b79888c193..acae30a04a94 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -1924,7 +1924,7 @@ struct perf_stats {
struct perf_series {
struct drm_i915_private *i915;
unsigned int nengines;
- struct intel_context *ce[];
+ struct intel_context *ce[] __counted_by(nengines);
};
static int cmp_u32(const void *A, const void *B)
