netdev - Re: Kernel panic in inet_twdr_do_twkill

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Message-ID: <m1y6t0nlle.fsf@fess.ebiederm.org>
Date:	Thu, 14 May 2009 01:18:53 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Daniel Lezcano <daniel.lezcano@...e.fr>
Cc:	netdev@...r.kernel.org, "Denis V. Lunev" <den@...nvz.org>
Subject: Re: Kernel panic in inet_twdr_do_twkill_work

Daniel Lezcano <daniel.lezcano@...e.fr> writes:

> Eric W. Biederman wrote:
>> So far I have only seen this twice.  But the backtrace looks
>> almost identical to the one in commit d315492b1a6ba29da0fa2860759505ae1b2db857
>>
>> The kernels I saw this on were patched version of 2.6.28 with some
>> network namespace backports.  commit
>> d315492b1a6ba29da0fa2860759505ae1b2db857 was definitely present.
>>
>> Daniel any ideas?
>>   
> Hi Eric,
>
> I found this one. May be it could be related to your problem:
>
> commit 2bad35b7c9588eb5e65c03bcae54e7eb6b1a6504
>
> Let me know :)

"netns: oops in ip[6]_frag_reasm incrementing stats" does not look likely.

There is no real ipv6 traffic currently on the our network and the panic
is definitely in inet_twdr_do_twkill_work.

Further we are getting the net of a timewait socket.  So I don't see how
a problem with NULL devs could have anything to do with it.

I really suspect the purge code is not being successful.

Eric

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