netdev - Re: [PATCH net-next-2.6] net/core: neighbour update Oops

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Message-Id: <20100714.180246.39175076.davem@davemloft.net>
Date:	Wed, 14 Jul 2010 18:02:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	rdkehn@...oo.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] net/core: neighbour update Oops

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 13 Jul 2010 17:38:31 +0200

> Le mardi 13 juillet 2010 à 08:23 -0700, Doug Kehn a écrit :
>> When configuring DMVPN (GRE + openNHRP) and a GRE remote
>> address is configured a kernel Oops is observed.  The
>> obserseved Oops is caused by a NULL header_ops pointer
>> (neigh->dev->header_ops) in neigh_update_hhs() when
>> 
>> void (*update)(struct hh_cache*, const struct net_device*, const unsigned char *)
>> = neigh->dev->header_ops->cache_update;
>> 
>> is executed.  The dev associated with the NULL header_ops is
>> the GRE interface.  This patch guards against the
>> possibility that header_ops is NULL.
>> 
>> This Oops was first observed in kernel version 2.6.26.8.
>> 
>> Signed-off-by: Doug Kehn <rdkehn@...oo.com>
> 
> Acked-by: Eric Dumazet <eric.dumazet@...il.com>

Applied and queued up for -stable, thanks!
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