From: Dave Jones <davej@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Subject: Re: __pskb_pull_tail oops from 2.6.35
Date: Tue, 27 Sep 2011 16:24:05 -0400 [thread overview]
Message-ID: <20110927202405.GB27713@redhat.com> (raw)
In-Reply-To: <20110927.161848.1967387021236457958.davem@davemloft.net>
On Tue, Sep 27, 2011 at 04:18:48PM -0400, David Miller wrote:
> From: Dave Jones <davej@redhat.com>
> Date: Tue, 27 Sep 2011 16:15:00 -0400
>
> > It looks like it died in put_page..
> >
> > <1>[ 262.574991] IP: [<ffffffff810dca57>] put_page+0x10/0x7c
> >
> > which is only called in one place..
> >
> > 1267 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
> > 1268 if (skb_shinfo(skb)->frags[i].size <= eat) {
> > 1269 put_page(skb_shinfo(skb)->frags[i].page);
> > 1270 eat -= skb_shinfo(skb)->frags[i].size;
> > 1271 } else {
>
> That's a pretty serious corruption, all frag array entries from 0 to
> nr_frags should have valid, non-NULL page pointers.
>
> Maybe a LRO/GRO bug? There were a couple of those.
I'll see if I can talk him into trying a self-built kernel, as we're not
rebasing f14 at this point in its life-cycle. If it turns out to still affect
3.x, I'll bring it up again.
Dave
next prev parent reply other threads:[~2011-09-27 20:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-27 20:03 __pskb_pull_tail oops from 2.6.35 Dave Jones
2011-09-27 20:08 ` David Miller
2011-09-27 20:15 ` Dave Jones
2011-09-27 20:18 ` David Miller
2011-09-27 20:24 ` Dave Jones [this message]
2011-09-27 20:37 ` Eric Dumazet
2011-09-28 7:30 ` Julian Anastasov
2011-10-03 16:13 ` Dave Jones
2011-10-03 16:20 ` David Miller
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