linux-kernel - Re: [PATCH] ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read

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Message-ID: <87sedpvwxi.wl-tiwai@suse.de>
Date: Fri, 05 Dec 2025 15:13:29 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Denis Arefev <arefev@...mel.ru>
Cc: David Rhodes <david.rhodes@...rus.com>,
	Richard Fitzgerald <rf@...nsource.cirrus.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Stefan Binding <sbinding@...nsource.cirrus.com>,
	linux-sound@...r.kernel.org,
	patches@...nsource.cirrus.com,
	linux-kernel@...r.kernel.org,
	lvc-project@...uxtesting.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read_acpi()

On Tue, 02 Dec 2025 11:13:36 +0100,
Denis Arefev wrote:
> 
> The acpi_get_first_physical_node() function can return NULL, in which
> case the get_device() function also returns NULL, but this value is
> then dereferenced without checking,so add a check to prevent a crash.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 7b2f3eb492da ("ALSA: hda: cs35l41: Add support for CS35L41 in HDA systems")
> Cc: stable@...r.kernel.org
> Signed-off-by: Denis Arefev <arefev@...mel.ru>

Applied now.  Thanks.


Takashi