netdev - Re: oops in tcp_xmit_retransmit

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Message-ID: <alpine.DEB.2.00.1009081232060.26447@wel-95.cs.helsinki.fi>
Date:	Wed, 8 Sep 2010 12:32:57 +0300 (EEST)
From:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
To:	Tejun Heo <tj@...nel.org>
cc:	Lennart Schulte <lennart.schulte@...s.rwth-aachen.de>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Fehrmann, Henning" <henning.fehrmann@....mpg.de>,
	Carsten Aulbert <carsten.aulbert@....mpg.de>
Subject: Re: oops in tcp_xmit_retransmit_queue() w/ v2.6.32.15

On Mon, 19 Jul 2010, Tejun Heo wrote:

> Hello,
> 
> On 07/16/2010 02:02 PM, Ilpo Järvinen wrote:
> > Besides, Tejun has also found that it's hint->next ptr which is NULL in 
> > his case so this won't solve his case anyway. Tejun, can you confirm 
> > whether it was retransmit_skb_hint->next being NULL on _entry time_ to 
> > tcp_xmit_retransmit_queue() or later on in the loop after the updates done 
> > by the loop itself to the hint (or that your testing didn't conclude 
> > either)?
> 
> Sorry about the delay.  I was traveling last week.  Unfortunately, I
> don't know whether ->next was NULL on entry or not.  I hacked up the
> following ugly patch for the next test run.  It should have everything
> which has come up till now + list and hint sanity checking before
> starting processing them.  I'm planning on deploying it w/ crashdump
> enabled in several days.  If I've missed something, please let me
> know.

Any news on this one?

-- 
 i.