linux-kernel - Re: 2.6.25 crash: EIP: [<c02e2f14>] xfrm_output

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Message-ID: <BAY103-DAV122A113843FE9574256A0AB2D60@phx.gbl>
Date:	Tue, 6 May 2008 12:44:33 +0200
From:	"Marco Berizzi" <pupilla@...mail.com>
To:	"Herbert Xu" <herbert@...dor.apana.org.au>
Cc:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: 2.6.25 crash: EIP: [<c02e2f14>] xfrm_output_resume+0x64/0x100 ss:esp 0068:c03a1e5c

Marco Berizziwrote:


> Herbert Xu wrote:
>
> > Marco Berizzi <pupilla@...mail.com> wrote:
> >> Just few minutes ago, another 2.6.25 crash
> >> with this message:
> >>
> >> EIP: [<c028000a>] netif_rx+0x6a/0xd0 SS:ESP 0068:c039f868
> >>
> >> http://80.204.235.230/4.jpg
> >
> > OK, the xfrm_output_resume trail revealed nothing.  Combined
> > with this crash however, it would appear that you've got a problem
> > with live skbs being freed.  Unfortunately such problems are
> > difficult to track down.
> >
> > Perhaps you could enable SLAB debugging to see if we can get
> > closer to the culprit?
>
> Yes indeed, I will try next monday.
>
> > Alternatively you could try a git bisection.
>
> Yes, but it could take forever... :-((
> As I said, I have removed the sfq and htb modules,
> and I would like to wait one week to see if these
> boxes will crash. I have 8 linux boxes running 2.6.25
> with the same .config and only the two with htb/sfq
> qdisc are crashing. Just few minutes ago I have seen
> this message forwarded to netdev by David Miller:
>
> Re: PROBLEM: kernel lockup while changing TC rules
>
> it is talking about htb/sfq. Maybe it is related.
>
> > Unless we have a way of reproducing this there isn't a lot more
> > that we can do I'm afraid.
>
> thanks anyway Herbert.

ok, I can confirm after one week uptime: this problem
is not happening after removing sch_htb/sch_sfq and
cls_fw modules.
What should I do to help track down this problem?


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