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Message-ID: <1282807354.2681.946.camel@edumazet-laptop>
Date: Thu, 26 Aug 2010 09:22:34 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: Ian Campbell <Ian.Campbell@...citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@...p.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Chris Wright <chrisw@...s-sol.org>,
"bugzilla-daemon@...zilla.kernel.org"
<bugzilla-daemon@...zilla.kernel.org>,
"bugme-daemon@...zilla.kernel.org" <bugme-daemon@...zilla.kernel.org>,
James Chapman <jchapman@...alix.com>,
"heil@...minal-consulting.de" <heil@...minal-consulting.de>,
"Xen-devel@...ts.xensource.com" <Xen-devel@...ts.xensource.com>
Subject: Re: [Bugme-new] [Bug 16529] New: xennet driver crashes when using
with pseudowire aka l2tpv3
Le jeudi 26 août 2010 à 08:10 +0100, Ian Campbell a écrit :
> On Wed, 2010-08-25 at 23:56 +0100, Jeremy Fitzhardinge wrote:
>
> > >> Here is a link for the setup
> > >> http://www.pastebin.org/445975
> > >> and here a link with more details about the crash http://pastebin.org/449221
> >
> > Please attach these to the bug or something; pastebin is not working for
> > me at the moment.
>
> It's really slow for me but got there eventually. I've attached the
> files.
>
> It's apparently hitting this BUG_ON in __skb_pull:
>
> static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)
> {
> skb->len -= len;
> BUG_ON(skb->len < skb->data_len);
> return skb->data += len;
> }
>
> Ian.
>
Thanks a lot.
I'll submit a patch to fix l2tp_eth_dev_recv()
Its illegal to call dev_forward_skb() with a too small payload.
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