netdev - Re: 2.6.25 crash: EIP: [<c02e2f14>] xfrm_output_resume+0x64/0x100 ss:esp 0068:c03a1e5c

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Message-ID: <BAY103-DAV9DAC70A1FBBEECCCC05E4B2D30@phx.gbl>
Date:	Fri, 9 May 2008 12:28:39 +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

Herbert Xu wrote:

> On Fri, May 09, 2008 at 11:50:00AM +0200, Marco Berizzi wrote:
> >
> > I have rebooted the two boxes with slub_debug.
> > This is the output taken with network console.
> > Herbert does it help you?
> >
> > BUG: unable to handle kernel paging request at 6b6b6b9f
>
> Unfortunately this just confirms that your skb has been freed
> prematurely because 6b is the poison value.
>
> However, it doesn't point us at the offender.

:-((

> Although I wonder if there might be something in netfilter that's
> freeing it since that's the only thing that could've run on your
> machine between the previous access and the crash.  I'll take
> another look.

Let me know if the only solution is git bisect.
The bug is spotted when sch_sfq/_htb and cls_fw
are loaded.


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