linux-kernel - Re: [PATCH] wifi: mt76: mt7996: avoid null deref in mt7996_stop

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Message-ID: <d220d52e-f656-4d4c-bf28-1ab40879c93e@web.de>
Date: Sat, 22 Mar 2025 14:54:52 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Qasim Ijaz <qasdev00@...il.com>, linux-wireless@...r.kernel.org,
 linux-mediatek@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org
Cc: LKML <linux-kernel@...r.kernel.org>,
 Angelo Gioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Bo Jiao <bo.jiao@...iatek.com>, Dan Carpenter <dan.carpenter@...aro.org>,
 Felix Fietkau <nbd@....name>, Johannes Berg <johannes@...solutions.net>,
 Lorenzo Bianconi <lorenzo@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 Peter Chiu <chui-hao.chiu@...iatek.com>, Ryder Lee <ryder.lee@...iatek.com>,
 Sean Wang <sean.wang@...iatek.com>, Shayne Chen <shayne.chen@...iatek.com>
Subject: Re: [PATCH] wifi: mt76: mt7996: avoid null deref in mt7996_stop_phy()

> In mt7996_stop_phy() the mt7996_phy structure is
> dereferenced before the null sanity check which could
> lead to a null deref.
>
> Fix by moving the dereference operation after the
> sanity check.

* You may occasionally put more than 53 characters into text lines
  of such a change description.

* Would you like to use the term “null pointer dereference” consistently?

* Were any known source code analysis tools involved also for
  this software improvement?


Regards,
Markus