[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1fc22ed54041660dfff5b7f3cc69708fd4ac0472.camel@redhat.com>
Date: Fri, 22 Sep 2023 15:00:47 -0400
From: Lyude Paul <lyude@...hat.com>
To: Kees Cook <keescook@...omium.org>, David Airlie <airlied@...il.com>
Cc: Ben Skeggs <bskeggs@...hat.com>, Karol Herbst <kherbst@...hat.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org, nouveau@...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>,
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>,
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>,
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>,
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,
intel-gfx@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
freedreno@...ts.freedesktop.org,
virtualization@...ts.linux-foundation.org, llvm@...ts.linux.dev,
linux-hardening@...r.kernel.org
Subject: Re: [PATCH 5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with
__counted_by
Reviewed-by: Lyude Paul <lyude@...hat.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@...hat.com>
> Cc: Karol Herbst <kherbst@...hat.com>
> Cc: Lyude Paul <lyude@...hat.com>
> Cc: David Airlie <airlied@...il.com>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: dri-devel@...ts.freedesktop.org
> Cc: nouveau@...ts.freedesktop.org
> Signed-off-by: Kees Cook <keescook@...omium.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 {
--
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat
Powered by blists - more mailing lists