linux-kernel - Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv

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Message-Id: <20151229.150843.2021692616139434395.davem@davemloft.net>
Date:	Tue, 29 Dec 2015 15:08:43 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	rweikusat@...ileactivedefense.com
Cc:	jacob@...nage.engineering, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au, edumazet@...gle.com,
	khlebnikov@...dex-team.ru, viro@...iv.linux.org.uk,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: Fix potential NULL pointer dereference in
 __skb_try_recv_datagram

From: Rainer Weikusat <rweikusat@...ileactivedefense.com>
Date: Tue, 29 Dec 2015 19:42:36 +0000

> Jacob Siverskog <jacob@...nage.engineering> writes:
>> This should fix a NULL pointer dereference I encountered (dump
>> below). Since __skb_unlink is called while walking,
>> skb_queue_walk_safe should be used.
> 
> The code in question is:
 ...
> __skb_unlink is only called prior to returning from the function.
> Consequently, it won't affect the skb_queue_walk code.

Agreed, this patch doesn't fix anything.
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