linux-hardening - [PATCH 3/9] drm/i915/selftests: Annotate struct perf_series with __counted

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230922173216.3823169-3-keescook@chromium.org>
Date: Fri, 22 Sep 2023 10:32:08 -0700
From: Kees Cook <keescook@...omium.org>
To: David Airlie <airlied@...il.com>
Cc: Kees Cook <keescook@...omium.org>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
	Daniel Vetter <daniel@...ll.ch>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	John Harrison <john.c.harrison@...el.com>,
	Andi Shyti <andi.shyti@...ux.intel.com>,
	Matthew Brost <matthew.brost@...el.com>,
	intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	Emma Anholt <emma@...olt.net>,
	Evan Quan <evan.quan@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	"Pan, Xinhui" <Xinhui.Pan@....com>,
	Xiaojian Du <Xiaojian.Du@....com>,
	Huang Rui <ray.huang@....com>,
	Kevin Wang <kevin1.wang@....com>,
	Hawking Zhang <Hawking.Zhang@....com>,
	Rob Clark <robdclark@...il.com>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Sean Paul <sean@...rly.run>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Ben Skeggs <bskeggs@...hat.com>,
	Karol Herbst <kherbst@...hat.com>,
	Lyude Paul <lyude@...hat.com>,
	Maxime Ripard <mripard@...nel.org>,
	David Airlie <airlied@...hat.com>,
	Gerd Hoffmann <kraxel@...hat.com>,
	Gurchetan Singh <gurchetansingh@...omium.org>,
	Chia-I Wu <olvaffe@...il.com>,
	Zack Rusin <zackr@...are.com>,
	VMware Graphics Reviewers <linux-graphics-maintainer@...are.com>,
	Melissa Wen <mwen@...lia.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>,
	Le Ma <le.ma@....com>,
	Lijo Lazar <lijo.lazar@....com>,
	Yifan Zhang <yifan1.zhang@....com>,
	Prike Liang <Prike.Liang@....com>,
	Lang Yu <Lang.Yu@....com>,
	Tejas Upadhyay <tejas.upadhyay@...el.com>,
	Nirmoy Das <nirmoy.das@...el.com>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Kuogee Hsieh <quic_khsieh@...cinc.com>,
	linux-kernel@...r.kernel.org,
	amd-gfx@...ts.freedesktop.org,
	linux-arm-msm@...r.kernel.org,
	freedreno@...ts.freedesktop.org,
	nouveau@...ts.freedesktop.org,
	virtualization@...ts.linux-foundation.org,
	llvm@...ts.linux.dev,
	linux-hardening@...r.kernel.org
Subject: [PATCH 3/9] drm/i915/selftests: Annotate struct perf_series 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 perf_series.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
Cc: David Airlie <airlied@...il.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Chris Wilson <chris@...is-wilson.co.uk>
Cc: John Harrison <john.c.harrison@...el.com>
Cc: Andi Shyti <andi.shyti@...ux.intel.com>
Cc: Matthew Brost <matthew.brost@...el.com>
Cc: intel-gfx@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 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)
-- 
2.34.1