netdev - Re: [Bugme-new] [Bug 16529] New: xennet driver crashes when using with pseudowire aka l2tpv3

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Message-ID: <1282806640.3469.26.camel@localhost.localdomain>
Date:	Thu, 26 Aug 2010 08:10:40 +0100
From:	Ian Campbell <Ian.Campbell@...citrix.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	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

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.


View attachment "445975.txt" of type "text/plain" (7778 bytes)

View attachment "449221.txt" of type "text/plain" (16022 bytes)