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Message-ID: <a14f11c8-2355-a311-9a59-0c6e69a6e503@embeddedor.com>
Date:   Fri, 22 Sep 2023 20:13:25 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Kees Cook <keescook@...omium.org>, David Airlie <airlied@...il.com>
Cc:     Evan Quan <evan.quan@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        Daniel Vetter <daniel@...ll.ch>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Huang Rui <ray.huang@....com>,
        Kevin Wang <kevin1.wang@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Emma Anholt <emma@...olt.net>,
        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>,
        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, intel-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: Re: [PATCH 1/9] drm/amd/pm: Annotate struct
 smu10_voltage_dependency_table with __counted_by



On 9/22/23 11:32, 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 smu10_voltage_dependency_table.
> 
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> 
> Cc: Evan Quan <evan.quan@....com>
> Cc: Alex Deucher <alexander.deucher@....com>
> Cc: "Christian König" <christian.koenig@....com>
> Cc: "Pan, Xinhui" <Xinhui.Pan@....com>
> Cc: David Airlie <airlied@...il.com>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Xiaojian Du <Xiaojian.Du@....com>
> Cc: Huang Rui <ray.huang@....com>
> Cc: Kevin Wang <kevin1.wang@....com>
> Cc: amd-gfx@...ts.freedesktop.org
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Thanks
-- 
Gustavo


> ---
>   drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> index 808e0ecbe1f0..42adc2a3dcbc 100644
> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.h
> @@ -192,7 +192,7 @@ struct smu10_clock_voltage_dependency_record {
>   
>   struct smu10_voltage_dependency_table {
>   	uint32_t count;
> -	struct smu10_clock_voltage_dependency_record entries[];
> +	struct smu10_clock_voltage_dependency_record entries[] __counted_by(count);
>   };
>   
>   struct smu10_clock_voltage_information {

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