netdev - Re: bridge br_multicast: BUG: unable to handle kernel NULL pointer dereference

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Date:	Mon, 05 Jul 2010 20:07:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	frank.arnold@....com, shemminger@...tta.com,
	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: Re: bridge br_multicast: BUG: unable to handle kernel NULL pointer
 dereference

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Tue, 6 Jul 2010 08:50:08 +0800

> On Tue, Jul 06, 2010 at 08:48:35AM +0800, Herbert Xu wrote:
>> 
>> bridge: Restore NULL check in br_mdb_ip_get
> 
> Resend with proper attribution.
> 
> bridge: Restore NULL check in br_mdb_ip_get
> 
> Somewhere along the line the NULL check in br_mdb_ip_get went
> AWOL, causing crashes when we receive an IGMP packet with no
> multicast table allocated.

It got removed by:

--------------------
commit 8ef2a9a59854994bace13b5c4f7edc2c8d4d124e
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date:   Sun Apr 18 12:42:07 2010 +0900

    bridge br_multicast: Make functions less ipv4 dependent.
    
    Introduce struct br_ip{} to store ip address and protocol
    and make functions more generic so that we can support
    both IPv4 and IPv6 with less pain.
    
    Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
--------------------

> This patch restores it and ensures all br_mdb_*_get functions
> use it.
> 
> Reported-by: Frank Arnold <frank.arnold@....com>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, thanks.
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