linux-kernel - Re: [PATCH v2] drm/bridge: tc358767: fix uninitialized variable regression

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Message-ID: <m4bitkuvouisk6ebhnz6yzkmrojuocos4tvjjmxahjg2dp2kgm@sxjmymi445vy>
Date: Sat, 5 Jul 2025 22:19:46 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc: "Colin King (gmail)" <colin.i.king@...il.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Hui Pu <Hui.Pu@...ealthcare.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] drm/bridge: tc358767: fix uninitialized variable
 regression

On Fri, Jul 04, 2025 at 01:30:18AM +0200, Luca Ceresoli wrote:
> Commit a59a27176914 ("drm/bridge: tc358767: convert to
> devm_drm_bridge_alloc() API") split tc_probe_bridge_endpoint() in two
> functions, thus duplicating the loop over the endpoints in each of those
> functions. However it missed duplicating the of_graph_parse_endpoint() call
> which initializes the struct of_endpoint, resulting in an uninitialized
> read.
> 
> Fixes: a59a27176914 ("drm/bridge: tc358767: convert to devm_drm_bridge_alloc() API")
> Cc: stable@...r.kernel.org
> Reported-by: Colin King (gmail) <colin.i.king@...il.com>
> Closes: https://lore.kernel.org/all/056b34c3-c1ea-4b8c-9672-c98903ffd012@gmail.com/
> Reviewed-by: Colin Ian King <colin.i.king@...il.com>
> Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> ---
> - Link to v1: https://lore.kernel.org/r/20250703-drm-bridge-alloc-fix-tc358767-regression-v1-1-8f224cd063c4@bootlin.com
> ---
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry