netdev - Re: [PATCH net] net: neighbour: add neighbour dead check for neigh_timer

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Date:	Tue, 3 Dec 2013 16:03:07 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Ding Tianhong <dingtianhong@...wei.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Gao feng <gaofeng@...fujitsu.com>,
	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>,
	Joe Perches <joe@...ches.com>,
	Veaceslav Falico <vfalico@...hat.com>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net: neighbour: add neighbour dead check for neigh_timer_handler()

Hi Ding!

On Tue, Dec 03, 2013 at 09:48:45PM +0800, Ding Tianhong wrote:
> I have met the oops in Suse11 SP2, the kernel is 2.6.32.59-0.7-default:
> 
> [64306.089036] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> [64306.089343] IP: [<ffffffff812f8e36>] neigh_timer_handler+0x116/0x3b0
> [64306.089535] PGD 0
> [64306.089706] Oops: 0000 [#1] SMP
> [64306.089935] last sysfs file: /sys/devices/pci0000:00/0000:00:03.0/0000:02:00.0/host0/target0:1:0/0:1:0:0/scsi_generic/sg0/dev
> [64306.090142] Die func triggered, code:1
> [64306.090147] CPU 1
> [64306.090258] Supported: Yes, External
> [64306.090262] Pid: 58359, comm: socknal_cd04 Tainted: P          N  2.6.32.59-0.7-default #1 T3500 G3
> [64306.090266] RIP: 0010:[<ffffffff812f8e36>]  [<ffffffff812f8e36>] neigh_timer_handler+0x116/0x3b0
> [64306.090272] RSP: 0018:ffff880c273499d8  EFLAGS: 00010206
> [64306.090275] RAX: 0000000000000000 RBX: ffff8801cddf1500 RCX: ffff8801cddf14f2
> [64306.090278] RDX: 0000000000000000 RSI: ffff8805e40d3a28 RDI: ffff8801cddf1500
> [64306.090281] RBP: ffff8805e40d3a28 R08: ffff8801cddf1530 R09: ffff880c27349b17
> [64306.090284] R10: 000000000000000e R11: ffffffff812f8e22 R12: ffff880185c0e840
> [64306.090287] R13: 0000000000000000 R14: ffff8805e40d3a60 R15: 0000000003484560
> [64306.090291] FS:  00007f081210e700(0000) GS:ffff880036420000(0000) knlGS:0000000000000000
> [64306.090295] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [64306.090297] CR2: 0000000000000008 CR3: 0000000001804000 CR4: 00000000000406e0
> [64306.090301] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [64306.090304] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [64306.090308] Process socknal_cd04 (pid: 58359, threadinfo ffff880c27348000, task ffff880c25d02300)
> [64306.090310] Stack:
> [64306.090426]  ffffffff8131f8e0 0000000000000003 ffff8801c189eb40 000000000000000a
> [64306.090437] <0> ffffffff00000000 0000000000000002 ffff880c27349a30 ffffffffa304790c
> [64306.090444] <0> 0000000000000246 000051010a010000 ffffffff81318357 31312d3300007fff
> [64306.090450] <0> ffff880c27349bb8 0248456003484560 ffff8801c189eb40 ffffffff81869300
> [64306.090456] <0> ffff880185c0e840 ffff8801cddf1514 ffff8805e40d3a28 00000000000000d0
> [64306.090464] Call Trace:

Do you still have the full output of the panic including the Code section
and could post it here?

Greetings,

  Hannes

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