From: Ben Greear <greearb-my8/4N5VtI7c+919tysfdA@public•gmane.org>
To: Eric Dumazet <eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public•gmane.org>
Cc: netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org>,
"linux-nfs-u79uwXL29TY76Z2rM5mHXA@public•gmane.org"
<linux-nfs-u79uwXL29TY76Z2rM5mHXA@public•gmane.org>
Subject: Re: 3.7.3+: Bad paging request in ip_rcv_finish while running NFS traffic.
Date: Mon, 21 Jan 2013 21:57:43 -0800 [thread overview]
Message-ID: <50FE2A57.3040804@candelatech.com> (raw)
In-Reply-To: <1358829606.3464.3151.camel@edumazet-glaptop>
On 01/21/2013 08:40 PM, Eric Dumazet wrote:
> On Mon, 2013-01-21 at 16:32 -0800, Ben Greear wrote:
>> On 01/21/2013 01:07 PM, Ben Greear wrote:
>>> I posted about this a few days ago, but this time the patches applied
>>> are minimal and there are no out-of-tree kernel modules loaded.
>>
>> Here's another crash, this time with SLUB memory debugging turned on.
>>
>> Seems much harder to hit this way...I've only managed this one. I
>> believe the RCX register might be interesting...that 6b is probably
>> freed memory poisioning. Maybe skb or skb_dest() is already freed?
>>
>> I have added a 'verify_mem_not_deleted(skb)' before the
>> dst_input line in ip_rcv_finish..but so far, it hasn't
>> hit the problem...
>>
>
> There is no way skb is freed here.
>
> I would say macvlan is at fault here.
>
> It probably lacks a proper (dev->flags & IFF_UP) test.
Thanks for the patch. It's running OK so far, but I'll need to
do a bunch more testing tomorrow to make sure I'm not just getting
lucky!
I'll let you know how it goes tomorrow.
Thanks,
Ben
--
Ben Greear <greearb-my8/4N5VtI7c+919tysfdA@public•gmane.org>
Candela Technologies Inc http://www.candelatech.com
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next prev parent reply other threads:[~2013-01-22 5:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-21 21:07 3.7.3+: Bad paging request in ip_rcv_finish while running NFS traffic Ben Greear
2013-01-22 0:32 ` Ben Greear
2013-01-22 4:40 ` Eric Dumazet
2013-01-22 5:57 ` Ben Greear [this message]
[not found] ` <50FE2A57.3040804-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-22 17:08 ` Ben Greear
[not found] ` <50FEC796.5090404-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-22 17:17 ` Eric Dumazet
2013-01-22 17:26 ` Ben Greear
2013-01-22 17:26 ` Eric Dumazet
2013-01-22 22:18 ` Ben Greear
[not found] ` <50FF102F.2050008-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-23 2:32 ` Ben Greear
2013-01-23 6:11 ` Eric Dumazet
2013-01-23 7:14 ` Ben Greear
[not found] ` <50FF8DEC.9070901-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-23 13:35 ` Eric Dumazet
2013-01-23 18:15 ` Ben Greear
2013-01-23 21:43 ` Eric Dumazet
2013-01-23 14:42 ` Eric Dumazet
2013-01-23 21:53 ` Ben Greear
[not found] ` <50FF4BC9.1060206-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-23 23:55 ` Ben Greear
[not found] ` <5100785D.8040101-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-24 0:01 ` Eric Dumazet
2013-01-24 0:13 ` Ben Greear
[not found] ` <51007CA8.2050105-my8/4N5VtI7c+919tysfdA@public.gmane.org>
2013-01-24 0:23 ` Eric Dumazet
2013-01-24 0:38 ` Ben Greear
2013-01-24 0:45 ` Eric Dumazet
2013-01-24 0:51 ` Ben Greear
2013-01-24 1:00 ` Eric Dumazet
2013-01-24 1:06 ` Ben Greear
2013-01-24 1:10 ` Eric Dumazet
2013-01-24 1:45 ` Eric Dumazet
2013-01-24 4:26 ` Ben Greear
2013-01-24 5:39 ` Eric Dumazet
2013-01-24 20:03 ` Ben Greear
2013-01-24 20:59 ` Eric Dumazet
2013-01-24 21:01 ` Ben Greear
2013-01-25 17:44 ` [PATCH] net: loopback: fix a dst refcounting issue Eric Dumazet
2013-01-27 6:32 ` David Miller
2013-01-27 17:25 ` Eric Dumazet
2013-01-28 0:26 ` David Miller
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