netdev - Re: [PATCH] bridge: fix crash when set mac address of br interface

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Date:	Sun, 24 Mar 2013 17:28:04 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	honkiko@...il.com
Cc:	netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
	stephen@...workplumber.org, herbert@...dor.hengli.com.au,
	zhiguo.hong@....com
Subject: Re: [PATCH] bridge: fix crash when set mac address of br interface

From: Hong Zhiguo <honkiko@...il.com>
Date: Sat, 23 Mar 2013 20:27:50 +0800

> When I tried to set mac address of a bridge interface to a mac
> address which already learned on this bridge, I got system hang.
> 
> The cause is straight forward: function br_fdb_change_mac_address
> calls fdb_insert with NULL source nbp. Then an fdb lookup is
> performed. If an fdb entry is found and it's local, it's OK. But
> if it's not local, source is dereferenced for printk without NULL
> check.
> 
> Signed-off-by: Hong Zhiguo <honkiko@...il.com>

Applied.
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