linux-kernel - Re: [PATCH] ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda

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Message-ID: <871q5i40lj.wl-tiwai@suse.de>
Date: Fri, 31 May 2024 14:39:20 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Simon Trimmer <simont@...nsource.cirrus.com>
Cc: <tiwai@...e.com>,
	<linux-sound@...r.kernel.org>,
	<alsa-devel@...a-project.org>,
	<linux-kernel@...r.kernel.org>,
	<patches@...nsource.cirrus.com>
Subject: Re: [PATCH] ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()

On Fri, 31 May 2024 14:08:20 +0200,
Simon Trimmer wrote:
> 
> The cs35l41_hda_unbind() function clears the hda_component entry
> matching it's index and then dereferences the codec pointer held in the
> first element of the hda_component array, this is an issue when the
> device index was 0.
> 
> Instead use the codec pointer stashed in the cs35l41_hda structure as it
> will still be valid.
> 
> Fixes: 7cf5ce66dfda ("ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda")
> Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>

Thanks, applied now.


Takashi