netdev - Re: Current Git: BUG: unable to handle kernel paging request at 0000000001a40ca0

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Date:	Thu, 24 Jul 2008 16:49:38 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Dieter Ries" <clip2@....de>
Cc:	"Vegard Nossum" <vegard.nossum@...il.com>,
	linux-kernel@...r.kernel.org, jgarzik@...ox.com,
	netdev@...r.kernel.org, jeffrey.t.kirsher@...el.com,
	e1000-devel@...ts.sourceforge.net,
	"Patrick McHardy" <kaber@...sh.net>, "Ingo Molnar" <mingo@...e.hu>
Subject: Re: Current Git: BUG: unable to handle kernel paging request at 0000000001a40ca0

Hi Dieter,

On Thu, Jul 24, 2008 at 9:51 AM, Dieter Ries <clip2@....de> wrote:
> Vegard Nossum schrieb:
>>
>> On Wed, Jul 23, 2008 at 11:53 PM, Dieter Ries <clip3@....de> wrote:
>>>>>
>>>>> Dieter: If this is reproducible, it would probably help quite a bit to
>>>>> configure the kernel with CONFIG_SLUB_DEBUG and boot with
>>>>> slub_debug=FZPUT (unless you already have CONFIG_SLUB_DEBUG_ON set, in
>>>>> which case you are already running with the SLUB debugging at boot).
>>>>> It might catch the corruption before it becomes fatal, or give us some
>>>>> more clues anyway.
>>>
>>> I tried to bisect the bug, which failed because there were too many
>>> kernels
>>> not booting with other problems, I guess bisecting just fails in the
>>> merge
>>> window.
>>>
>>> With CONFIG_SLUB_DEBUG_ON the output looks different, unfortunately
>>> netconsole stops before those are transmitted.
>
> I think I managed to catch one of those:
>
>
> general protection fault: 0000 [1] SMP
> CPU 0
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.26-06373-gcaf076e #49
> RIP: 0010:[<ffffffff805e08f9>]  [<ffffffff805e08f9>]
> nf_nat_move_storage+0x21/0x7a
> RSP: 0018:ffffffff8091ab80  EFLAGS: 00010206
> RAX: ffffffff805e08d8 RBX: ffff88007d1fb948 RCX: 000000000000006b
> RDX: ffff88007d175e10 RSI: ffff88007d175e7b RDI: ffff88007d1fb948
> RBP: ffffffff8091aba0 R08: 0000000000000000 R09: ffff88007d175e90
> R10: ffffe20000000008 R11: ffff88007d175e10 R12: 59d2c3ffff88007d
> R13: ffff88007d175e7b R14: 00000000000000a0 R15: 0000000000000001
> FS:  0000000000000000(0000) GS:ffffffff8089ee80(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 0, threadinfo ffffffff808b0000, task ffffffff80842340)
> Stack:  0000000000000002 ffff88007d3d2000 ffff88007d1fb948 0000000000000070
>  ffffffff8091abf0 ffffffff8059d3c4 ffffffff8091ac40 0000000100000001
>  ffffffff809e3658 ffff88007d3d2000 0000000000000002 ffff88007f9f6500
> Call Trace:
>  <IRQ>  [<ffffffff8059d3c4>] __nf_ct_ext_add+0x15f/0x1f7
>  [<ffffffff805e762c>] nf_nat_fn+0x84/0x152
>  [<ffffffff805e77d8>] nf_nat_in+0x2f/0x71
>  [<ffffffff805953d8>] nf_iterate+0x48/0x85
>  [<ffffffff805b19c0>] ? ip_rcv_finish+0x0/0x35d
>  [<ffffffff80595478>] nf_hook_slow+0x63/0xcb
>  [<ffffffff805b19c0>] ? ip_rcv_finish+0x0/0x35d
>  [<ffffffff8028fe7c>] ? __slab_alloc+0x413/0x4bd
>  [<ffffffff805b21b8>] ip_rcv+0x257/0x297
>  [<ffffffff80581461>] netif_receive_skb+0x1f1/0x263
>  [<ffffffff80495b34>] e1000_receive_skb+0x46/0x5d
>  [<ffffffff8049830b>] e1000_clean_rx_irq+0x20e/0x2a6
>  [<ffffffff8024cce8>] ? getnstimeofday+0x3f/0xa0
>  [<ffffffff804952ce>] e1000_clean+0x6d/0x218
>  [<ffffffff8024ad39>] ? hrtimer_get_next_event+0xa8/0xb8
>  [<ffffffff80583569>] net_rx_action+0xa9/0x17c
>  [<ffffffff80239b51>] __do_softirq+0x65/0xd5
>  [<ffffffff8020c5dc>] call_softirq+0x1c/0x28
>  [<ffffffff8020dd0a>] do_softirq+0x39/0x77
>  [<ffffffff80239aab>] irq_exit+0x44/0x85
>  [<ffffffff8020dff5>] do_IRQ+0x147/0x16a
>  [<ffffffff8020b8a1>] ret_from_intr+0x0/0xa

Dieter, can you please try this patch:

http://lkml.org/lkml/2008/7/24/186

Patrick, it looks like this could be the same bug Ingo is hitting?
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