linux-kernel - Re: [PATCH] ARM: mvebu: Add check in coherency.c to prevent null pointer dereference

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Message-ID: <Zdsky9nVdwP6Ry0E@shell.armlinux.org.uk>
Date: Sun, 25 Feb 2024 11:30:19 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Duoming Zhou <duoming@....edu.cn>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	andrew@...n.ch, gregory.clement@...tlin.com,
	sebastian.hesselbarth@...il.com
Subject: Re: [PATCH] ARM: mvebu: Add check in coherency.c to prevent null
 pointer dereference

On Sun, Feb 25, 2024 at 02:04:50PM +0800, Duoming Zhou wrote:
> The kzalloc() in armada_375_380_coherency_init() will return
> null if the physical memory has run out. As a result, if we
> dereference the property pointer, the null pointer dereference
> bug will happen.
> 
> This patch adds a check to avoid null pointer dereference.

Again, what if kstrdup() fails?

-- 
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