linux-kernel - Re: [PATCH] drm: bridge: cdns-mhdp8546: Fix possible null pointer dereference

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Date: Mon,  8 Apr 2024 17:40:20 +0200
From: Robert Foss <rfoss@...nel.org>
To: Aleksandr Mishin <amishin@...rgos.ru>,
	Swapnil Jakhade <sjakhade@...ence.com>
Cc: Robert Foss <rfoss@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	lvc-project@...uxtesting.org,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Quentin Schulz <quentin.schulz@...e-electrons.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	dri-devel@...ts.freedesktop.org,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Zhu Wang <wangzhu9@...wei.com>,
	linux-kernel@...r.kernel.org,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Rob Herring <robh@...nel.org>,
	David Airlie <airlied@...il.com>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maxime Ripard <mripard@...nel.org>,
	Jyri Sarha <jsarha@...com>,
	Yuti Amonkar <yamonkar@...ence.com>,
	Nikhil Devshatwar <nikhil.nd@...com>,
	Jonas Karlman <jonas@...boo.se>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Aradhya Bhatia <a-bhatia1@...com>,
	Daniel Vetter <daniel@...ll.ch>,
	Jani Nikula <jani.nikula@...el.com>
Subject: Re: [PATCH] drm: bridge: cdns-mhdp8546: Fix possible null pointer dereference

On Mon, 8 Apr 2024 15:58:10 +0300, Aleksandr Mishin wrote:
> In cdns_mhdp_atomic_enable(), the return value of drm_mode_duplicate() is
> assigned to mhdp_state->current_mode, and there is a dereference of it in
> drm_mode_set_name(), which will lead to a NULL pointer dereference on
> failure of drm_mode_duplicate().
> 
> Fix this bug add a check of mhdp_state->current_mode.
> 
> [...]

Applied, thanks!

[1/1] drm: bridge: cdns-mhdp8546: Fix possible null pointer dereference
      https://cgit.freedesktop.org/drm/drm-misc/commit/?id=935a92a1c400



Rob