linux-kernel - Re: [PATCH] drm/msm/dpu: check for valid hw_pp in dpu_encoder_helper_phys

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <CAA8EJprGU8E=kM3xqta794HjGAPp7ScuLv_us9KpjrELDKwNcA@mail.gmail.com>
Date: Wed, 17 Jan 2024 22:49:48 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>, 
	Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, dri-devel@...ts.freedesktop.org, 
	seanpaul@...omium.org, quic_jesszhan@...cinc.com, dan.carpenter@...aro.org, 
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm/dpu: check for valid hw_pp in dpu_encoder_helper_phys_cleanup

On Wed, 17 Jan 2024 at 21:41, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
> The commit 8b45a26f2ba9 ("drm/msm/dpu: reserve cdm blocks for writeback
> in case of YUV output") introduced a smatch warning about another
> conditional block in dpu_encoder_helper_phys_cleanup() which had assumed
> hw_pp will always be valid which may not necessarily be true.
>
> Lets fix the other conditional block by making sure hw_pp is valid
> before dereferencing it.
>
> Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> Fixes: ae4d721ce100 ("drm/msm/dpu: add an API to reset the encoder related hw blocks")
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry