linux-kernel - Re: [PATCH] extcon: realtek: fix NULL deref check in extcon_rtk_type_c

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Message-ID: <c27f53e8-5155-47f6-afb7-15b53cd5aa4d@web.de>
Date: Mon, 18 Nov 2024 13:00:09 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Charles Han <hanchunchao@...pur.com>, Chanwoo Choi
 <cw00.choi@...sung.com>, MyungJoo Ham <myungjoo.ham@...sung.com>,
 Stanley Chang <stanley_chang@...ltek.com>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] extcon: realtek: fix NULL deref check in
 extcon_rtk_type_c_probe

> In extcon_rtk_type_c_probe() devm_kzalloc() may return NULL but this
> returned value is not checked.

Another wording suggestion:
A devm_kzalloc() call can return a null pointer on failure.
But such a return value was not checked in this function implementation.
Thus add a corresponding check so that a null pointer dereference
will be avoided.

Would a summary phrase like “Prevent null pointer dereference in extcon_rtk_type_c_probe()”
be a bit nicer?

Regards,
Markus