linux-kernel - Re: [PATCH 01/10] ASoC: qcom: q6apm: fix array out of bounds on lpass ports

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Message-ID: <a8706da6-20fb-456e-a428-4c7b2c5bc26b@sirena.org.uk>
Date: Thu, 5 Feb 2026 17:46:32 +0000
From: Mark Brown <broonie@...nel.org>
To: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
Cc: lgirdwood@...il.com, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, srini@...nel.org, perex@...ex.cz,
	tiwai@...e.com, alexey.klimov@...aro.org,
	mohammad.rafi.shaik@....qualcomm.com, quic_wcheng@...cinc.com,
	johan@...nel.org, dmitry.baryshkov@....qualcomm.com,
	konrad.dybcio@....qualcomm.com, linux-arm-msm@...r.kernel.org,
	linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Stable@...r.kernel.org
Subject: Re: [PATCH 01/10] ASoC: qcom: q6apm: fix array out of bounds on
 lpass ports

On Thu, Feb 05, 2026 at 12:14:02PM -0500, Srinivas Kandagatla wrote:
> lpass ports numbers have been added but the apm driver never got updated
> with new max port value that it uses to store dai specific data.
> 
> This will result in array out of bounds and weird driver behaviour.
> Fix this by adding a new LPASS_MAX_PORT which is can be used by driver
> instead of using number and any new port additional can only be done in
> one place, which should avoid these type of mistakes in future.

It would probably be good to improve the valdiation in the driver when
it starts using port numbers.

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