linux-kernel - Re: v2.6.26-rc9: kernel BUG at kernel/sched.c:5858!

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Date:	Thu, 10 Jul 2008 15:43:18 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Dmitry Adamushko" <dmitry.adamushko@...il.com>
Cc:	Yanmin <yanmin_zhang@...ux.intel.com>,
	"Rusty Russell" <rusty@...tcorp.com.au>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
	"Gautham R Shenoy" <ego@...ibm.com>,
	"Heiko Carstens" <heiko.carstens@...ibm.com>, miaox@...fujitsu.com,
	"Lai Jiangshan" <laijs@...fujitsu.com>,
	"Avi Kivity" <avi@...ranet.com>, linux-kernel@...r.kernel.org,
	"Pekka Enberg" <penberg@...helsinki.fi>
Subject: Re: v2.6.26-rc9: kernel BUG at kernel/sched.c:5858!

On Thu, Jul 10, 2008 at 3:33 PM, Vegard Nossum <vegard.nossum@...il.com> wrote:
>> Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC
>> Pid: 19762, comm: grep Not tainted (2.6.26-rc9-00059-gb190333 #5)
>> EIP: 0060:[<c01991c7>] EFLAGS: 00210203 CPU: 0
>> EIP is at kmem_cache_alloc+0xc7/0xe0
>
> $ addr2line -e vmlinux -i c01991c7
> include/asm/string_32.h:183
> mm/slub.c:1646
>
> For reference, the disassembly:
> c01991c7:       f3 ab                   rep stos %eax,%es:(%edi)
>
> and registers in question:
>
> ESI: 00200282 EDI: f6c44000 EBP: e7c2befc ESP: e7c2bedc
>  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068

Got a similar one (same EIP), but this time with the "top" of the oops as well:

BUG: unable to handle kernel paging request at e82be000
IP: [<c01991c7>] kmem_cache_alloc+0xc7/0xe0
*pde = 35657163 *pte = 282be160
Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Pid: 3879, comm: grep Not tainted (2.6.26-rc9-00059-gb190333 #5)
EIP: 0060:[<c01991c7>] EFLAGS: 00210203 CPU: 0
EIP is at kmem_cache_alloc+0xc7/0xe0
EAX: 00000000 EBX: e82bdf00 ECX: 1adada9a EDX: 6b6b6b6b
ESI: 00200282 EDI: e82be000 EBP: da711e74 ESP: da711e54
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process grep (pid: 3879, ti=da710000 task=da7f6f90 task.ti=da710000)
Stack: c019fa36 f7a9cf20 c019fa36 000080d0 f7811c30 00000003 da711f04 ffffffe9
       da711e8c c019fa36 c092e478 000001f6 00000003 da711f04 da711eac c01a8e44
       00001000 e802a100 ffffff9c da711f04 00018801 00000004 da711ec4 c01a8f31
Call Trace:
 [<c019fa36>] ? get_empty_filp+0x36/0x140
 [<c019fa36>] ? get_empty_filp+0x36/0x140
 [<c019fa36>] ? get_empty_filp+0x36/0x140
 [<c01a8e44>] ? __path_lookup_intent_open+0x24/0x90
 [<c01a8f31>] ? path_lookup_open+0x21/0x30
 [<c01a8fd3>] ? do_filp_open+0x93/0x710
 [<c019cc48>] ? get_unused_fd_flags+0xc8/0xf0
 [<c05849b7>] ? _spin_unlock+0x27/0x50
 [<c019cc48>] ? get_unused_fd_flags+0xc8/0xf0
 [<c019ccb9>] ? do_sys_open+0x49/0xe0
 [<c019fbf9>] ? fput+0x19/0x20
 [<c019cdb9>] ? sys_open+0x29/0x40
 [<c0104ceb>] ? sysenter_past_esp+0x78/0xd1
 =======================
Code: b9 ff ff ff ff 8b 55 ec 89 7c 24 04 89 04 24 8b 45 f0 e8 4d f6 ff ff 89 c3
 eb a0 85 db 74 bc 8b 57 10 31 c0 89 df 89 d1 c1 e9 02 <f3> ab f6 c2 02 74 02 66
 ab f6 c2 01 74 01 aa eb 9f 90 8d b4 26
EIP: [<c01991c7>] kmem_cache_alloc+0xc7/0xe0 SS:ESP 0068:da711e54
---[ end trace f3a251e0ce11b6fd ]---

This seems to be grep both times, the command I used is:

    $ grep -r . /sys


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
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