Re: BUG in skb_dequeue (skb->next is NULL)

From: Simon Schubert
Date: Wed Dec 01 2010 - 05:42:59 EST


On 12/01/2010 11:28 AM, Eric Dumazet wrote:
> Le mercredi 01 dÃcembre 2010 Ã 09:02 +0000, Simon Schubert a Ãcrit :
>> FrÃdÃric L. W. Meunier <2 <at> pervalidus.net> writes:
>
> CC netdev
>> RIP: 0010:[<ffffffff81459069>] [<ffffffff81459069>] skb_dequeue+0x59/0x90
>> Call Trace:
>> [<ffffffff814ef0fa>] unix_stream_recvmsg+0x1aa/0x790
>> [<ffffffff8145124d>] sock_recvmsg+0xfd/0x130
>> [<ffffffff81155fd0>] ? pollwake+0x0/0x60
>> [<ffffffff81452b54>] __sys_recvmsg+0x144/0x2e0
>> [<ffffffff81155fd0>] ? pollwake+0x0/0x60
>> [<ffffffff8104d88a>] ? finish_task_switch+0x4a/0xd0
>> [<ffffffff8154fa91>] ? schedule+0x411/0xa50
>> [<ffffffff81452f99>] sys_recvmsg+0x49/0x80
>> [<ffffffff8100b0b2>] system_call_fastpath+0x16/0x1b
>
> Is it reproductible ?

I can't trigger it on purpose, but it happened two nights in a row (I
don't have the previous backtrace though)

> On previous kernel (say 2.6.35) you never hit this bug ?

No.

cheers
simon

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