netdev - Re: [PATCH] batman-adv: Fix NULL pointer dereference in DAT hash collision avoidance

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Message-Id: <20130213.133609.1664152397252172830.davem@davemloft.net>
Date:	Wed, 13 Feb 2013 13:36:09 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	paukoning@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] batman-adv: Fix NULL pointer dereference in DAT hash
 collision avoidance

From: Pau Koning <paukoning@...il.com>
Date: Tue, 12 Feb 2013 11:18:45 +0100

> An entry in DAT with the hashed position of 0 can cause a NULL pointer
> dereference when the first entry is checked by batadv_choose_next_candidate.
> This first candidate automatically has the max value of 0 and the max_orig_node
> of NULL. Not checking max_orig_node for NULL in batadv_is_orig_node_eligible
> will lead to a NULL pointer dereference when checking for the lowest address.
> 
> This problem was added in 785ea1144182c341b8b85b0f8180291839d176a8
> ("batman-adv: Distributed ARP Table - create DHT helper functions").
> 
> Signed-off-by: Pau Koning <paukoning@...il.com>

Applied.
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