2008-02-06 19:01:07

by John Heil

[permalink] [raw]
Subject: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)


Hi,

I have recently had a couple of seemingly hard hangs requiring reboot by
reset button. I could not ping the box.

Until now, the console log (log level 7) was empty/normal...

This morning I finally seem to have found out what the failures are...
an rmap bug for real mem > 4G...


First, some info on my system...

Kernel 2.6.24 SMP on AMD Athlon 64 X2 4000

top - 09:44:55 up 24 min, 42 users, load average: 0.05, 0.11, 0.16
Tasks: 206 total, 3 running, 203 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.3%us, 1.3%sy, 0.0%ni, 96.2%id, 0.0%wa, 0.0%hi, 2.2%si,
0.0%st
Mem: 8248340k total, 3769556k used, 4478784k free, 82732k buffers
Swap: 7828572k total, 0k used, 7828572k free, 3254360k cached

*** top used was about 6.2G w 0k Swap usage.

I was working on local X (there were also 2 remote xdm KDE sessions as
well) when my openoffice edit acted strangely. A couple minutes
later, X completely locked up.

A remote ssh session allowed me to do a normal shutdown.

On reboot, I found the bug log in the console log, included below


Before digging into this myself (don't really have enought time),
I thought I'd submit it here...

my .config is tar gz'd as an attachment

Any input would be appreciated...


Thnx much,

johnh


.
===========================================================
John Heil
South Coast Software
Custom firmware, device drivers and board bring up services
Ph: 1-714-774-6952
Fx: 1-714-774-7053
http://www.sc-software.com
email: [email protected]
===========================================================


Feb 6 09:09:47 sc-software kernel: Eeek! page_mapcount(page) went
negative! (-1)
Feb 6 09:09:47 sc-software kernel: page pfn = 12b1b1
Feb 6 09:09:47 sc-software kernel: page->flags = 80080014
Feb 6 09:09:47 sc-software kernel: page->count = 0
Feb 6 09:09:47 sc-software kernel: page->mapping = 00000000
Feb 6 09:09:47 sc-software kernel: vma->vm_ops = 0x0
Feb 6 09:09:47 sc-software kernel: ------------[ cut here ]------------
Feb 6 09:09:47 sc-software kernel: kernel BUG at mm/rmap.c:631!
Feb 6 09:09:47 sc-software kernel: invalid opcode: 0000 [#2] PREEMPT SMP
Feb 6 09:09:47 sc-software kernel: Modules linked in: shpchp pci_hotplug
ohci1394 ieee1394
Feb 6 09:09:47 sc-software kernel:
Feb 6 09:09:47 sc-software kernel: Pid: 3710, comm: X Tainted: G D
(2.6.24 #1)
Feb 6 09:09:47 sc-software kernel: EIP: 0060:[<c016fc36>] EFLAGS:
00213246 CPU: 0
Feb 6 09:09:47 sc-software kernel: EIP is at page_remove_rmap+0xe6/0x110
Feb 6 09:09:47 sc-software kernel: EAX: 00000000 EBX: c516deb8 ECX:
c01280a8 EDX: 00000001
Feb 6 09:09:47 sc-software kernel: ESI: f7120ee4 EDI: 11605000 EBP:
f1b31d70 ESP: f1b31d60
Feb 6 09:09:47 sc-software kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000
SS: 0068
Feb 6 09:09:47 sc-software kernel: Process X (pid: 3710, ti=f1b30000
task=f0586aa0 task.ti=f1b30000)
Feb 6 09:09:47 sc-software kernel: Stack: c074dda2 00000000 c516deb8
f0662028 f1b31db4 c01683ce 2b1b1065 00000001
Feb 6 09:09:47 sc-software kernel: 00000000 00000000 2b1b1065
00000001 c1a9657c fffffffb ffffffff f71cb300
Feb 6 09:09:47 sc-software kernel: f7120ee4 c8e36180 1a004000
11800000 f07fe460 f1b31df8 c016858d 11600000
Feb 6 09:09:47 sc-software kernel: Call Trace:
Feb 6 09:09:47 sc-software kernel: [<c0103e5a>]
show_trace_log_lvl+0x1a/0x30
Feb 6 09:09:47 sc-software kernel: [<c0103f2a>]
show_stack_log_lvl+0x9a/0xc0
Feb 6 09:09:47 sc-software kernel: [<c01040d7>]
show_registers+0xc7/0x250
Feb 6 09:09:47 sc-software kernel: [<c010441f>] die+0x11f/0x220
Feb 6 09:09:47 sc-software kernel: [<c01045b1>] do_trap+0x91/0xd0
Feb 6 09:09:47 sc-software kernel: [<c0104859>] do_invalid_op+0x89/0xa0
Feb 6 09:09:47 sc-software kernel: [<c0657c22>] error_code+0x72/0x78
Feb 6 09:09:47 sc-software kernel: [<c01683ce>]
zap_pte_range+0x22e/0x320
Feb 6 09:09:47 sc-software kernel: [<c016858d>]
unmap_page_range+0xcd/0x180
Feb 6 09:09:47 sc-software kernel: [<c016870d>] unmap_vmas+0xcd/0x210
Feb 6 09:09:47 sc-software kernel: [<c016dd36>] exit_mmap+0x76/0x120
Feb 6 09:09:47 sc-software kernel: [<c0124c39>] mmput+0x39/0xa0
Feb 6 09:09:47 sc-software kernel: [<c0129b3e>] exit_mm+0x8e/0xf0
Feb 6 09:09:47 sc-software kernel: [<c012a393>] do_exit+0x153/0x350
Feb 6 09:09:47 sc-software kernel: [<c012a5e9>] do_group_exit+0x29/0x70
Feb 6 09:09:47 sc-software kernel: [<c0134452>]
get_signal_to_deliver+0x242/0x2e0
Feb 6 09:09:47 sc-software kernel: [<c0102e4c>] do_signal+0x5c/0x170
Feb 6 09:09:47 sc-software kernel: [<c0102f9c>]
do_notify_resume+0x3c/0x40
Feb 6 09:09:47 sc-software kernel: [<c01031b5>] work_notifysig+0x13/0x1a
Feb 6 09:09:47 sc-software kernel: =======================
Feb 6 09:09:47 sc-software kernel: Code: bb dd 74 c0 e8 dc 2f fe ff 8b 46
44 85 c0 75 1f 8b 46 4c 85
c0 74 14 8b 40 10 85 c0 74 0d 8b 50 2c b8 14 ec 74 c0 e8 ba 2f fe ff <0f>
0b eb fe 8b 50 0c b8 38
ec 74 c0 e8 a9 2f fe ff 8b 46 44 8b
Feb 6 09:09:47 sc-software kernel: EIP: [<c016fc36>]
page_remove_rmap+0xe6/0x110 SS:ESP 0068:f1b31d60
Feb 6 09:09:47 sc-software kernel: ---[ end trace 791c1b0a2eb87d50 ]---
Feb 6 09:09:47 sc-software kernel: Fixing recursive fault but reboot is
needed!
Feb 6 09:09:47 sc-software kernel: BUG: scheduling while atomic:
X/3710/0x00000003
Feb 6 09:09:47 sc-software kernel: INFO: lockdep is turned off.
Feb 6 09:09:47 sc-software kernel: Pid: 3710, comm: X Tainted: G D
2.6.24 #1
Feb 6 09:09:47 sc-software kernel: [<c0103e5a>]
show_trace_log_lvl+0x1a/0x30
Feb 6 09:09:47 sc-software kernel: [<c0103e82>] show_trace+0x12/0x20
Feb 6 09:09:47 sc-software kernel: [<c0103ffd>] dump_stack+0x6d/0x80
Feb 6 09:09:47 sc-software kernel: [<c0120f56>] __schedule_bug+0x66/0x70
Feb 6 09:09:47 sc-software kernel: [<c0655655>]
__sched_text_start+0x295/0x490
Feb 6 09:09:47 sc-software kernel: [<c012a4ab>] do_exit+0x26b/0x350
Feb 6 09:09:47 sc-software kernel: [<c0104513>] die+0x213/0x220
Feb 6 09:09:47 sc-software kernel: [<c01045b1>] do_trap+0x91/0xd0
Feb 6 09:09:47 sc-software kernel: [<c0104859>] do_invalid_op+0x89/0xa0
Feb 6 09:09:47 sc-software kernel: [<c0657c22>] error_code+0x72/0x78
Feb 6 09:09:47 sc-software kernel: [<c01683ce>]
zap_pte_range+0x22e/0x320
Feb 6 09:09:47 sc-software kernel: [<c016858d>]
unmap_page_range+0xcd/0x180
Feb 6 09:09:47 sc-software kernel: [<c016870d>] unmap_vmas+0xcd/0x210
Feb 6 09:09:47 sc-software kernel: [<c016dd36>] exit_mmap+0x76/0x120
Feb 6 09:09:47 sc-software kernel: [<c0124c39>] mmput+0x39/0xa0
Feb 6 09:09:47 sc-software kernel: [<c0129b3e>] exit_mm+0x8e/0xf0
Feb 6 09:09:47 sc-software kernel: [<c012a393>] do_exit+0x153/0x350
Feb 6 09:09:47 sc-software kernel: [<c012a5e9>] do_group_exit+0x29/0x70
Feb 6 09:09:47 sc-software kernel: [<c0134452>]
get_signal_to_deliver+0x242/0x2e0
Feb 6 09:09:47 sc-software kernel: [<c0102e4c>] do_signal+0x5c/0x170
Feb 6 09:09:47 sc-software kernel: [<c0102f9c>]
do_notify_resume+0x3c/0x40
Feb 6 09:09:47 sc-software kernel: [<c01031b5>] work_notifysig+0x13/0x1a
Feb 6 09:09:47 sc-software kernel: =======================


Attachments:
config-2624smp-rmap.tar.gz (14.31 kB)
.config - rmap bug

2008-02-06 19:56:04

by Hugh Dickins

[permalink] [raw]
Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)

On Wed, 6 Feb 2008, [email protected] wrote:
>
> Before digging into this myself (don't really have enought time),
> I thought I'd submit it here...

Thanks for the report.

> Feb 6 09:09:47 sc-software kernel: Eeek! page_mapcount(page) went negative!

These very often turn out the be due to bad RAM or some such:
worth running memtest86+ overnight when you can, though its
success wouldn't be conclusive.

> (-1)
> Feb 6 09:09:47 sc-software kernel: page pfn = 12b1b1
> Feb 6 09:09:47 sc-software kernel: page->flags = 80080014
> Feb 6 09:09:47 sc-software kernel: page->count = 0

That's a free page which shouldn't have appeared in the pagetable.
It could be that there's a bit error somewhere in that pfn of 12b1b1.

> Feb 6 09:09:47 sc-software kernel: page->mapping = 00000000
> Feb 6 09:09:47 sc-software kernel: vma->vm_ops = 0x0
> Feb 6 09:09:47 sc-software kernel: ------------[ cut here ]------------
> Feb 6 09:09:47 sc-software kernel: kernel BUG at mm/rmap.c:631!
> Feb 6 09:09:47 sc-software kernel: invalid opcode: 0000 [#2] PREEMPT SMP
> Feb 6 09:09:47 sc-software kernel: Modules linked in: shpchp pci_hotplug
> ohci1394 ieee1394
> Feb 6 09:09:47 sc-software kernel:
> Feb 6 09:09:47 sc-software kernel: Pid: 3710, comm: X Tainted: G D

But that [#2] and that D taint both say there was already a problem
before this: anything showing in the log for that?

Hugh

2008-02-06 20:21:34

by John Heil

[permalink] [raw]
Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)

On Wed, 6 Feb 2008, Hugh Dickins wrote:

> Date: Wed, 6 Feb 2008 19:55:36 +0000 (GMT)
> From: Hugh Dickins <[email protected]>
> To: John Heil <[email protected]>
> Cc: [email protected]
> Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)
>
> On Wed, 6 Feb 2008, [email protected] wrote:
>>
>> Before digging into this myself (don't really have enought time),
>> I thought I'd submit it here...
>
> Thanks for the report.
>
>> Feb 6 09:09:47 sc-software kernel: Eeek! page_mapcount(page) went negative!
>
> These very often turn out the be due to bad RAM or some such:
> worth running memtest86+ overnight when you can, though its
> success wouldn't be conclusive.
>
>> (-1)
>> Feb 6 09:09:47 sc-software kernel: page pfn = 12b1b1
>> Feb 6 09:09:47 sc-software kernel: page->flags = 80080014
>> Feb 6 09:09:47 sc-software kernel: page->count = 0
>
> That's a free page which shouldn't have appeared in the pagetable.
> It could be that there's a bit error somewhere in that pfn of 12b1b1.
>
>> Feb 6 09:09:47 sc-software kernel: page->mapping = 00000000
>> Feb 6 09:09:47 sc-software kernel: vma->vm_ops = 0x0
>> Feb 6 09:09:47 sc-software kernel: ------------[ cut here ]------------
>> Feb 6 09:09:47 sc-software kernel: kernel BUG at mm/rmap.c:631!
>> Feb 6 09:09:47 sc-software kernel: invalid opcode: 0000 [#2] PREEMPT SMP
>> Feb 6 09:09:47 sc-software kernel: Modules linked in: shpchp pci_hotplug
>> ohci1394 ieee1394
>> Feb 6 09:09:47 sc-software kernel:
>> Feb 6 09:09:47 sc-software kernel: Pid: 3710, comm: X Tainted: G D
>
> But that [#2] and that D taint both say there was already a problem
> before this: anything showing in the log for that?
>
> Hugh


>From reboot after last hang on 02/03/08, I found this...


Feb 5 23:26:26 sc-software kernel: ------------[ cut here ]------------
Feb 5 23:26:26 sc-software kernel: kernel BUG at mm/slab.c:591!
Feb 5 23:26:26 sc-software kernel: invalid opcode: 0000 [#1] PREEMPT SMP
Feb 5 23:26:26 sc-software kernel: Modules linked in: shpchp pci_hotplug
ohci1394 ieee1394
Feb 5 23:26:26 sc-software kernel:
Feb 5 23:26:26 sc-software kernel: Pid: 6040, comm: modprobe Not tainted
(2.6.24 #1)
Feb 5 23:26:26 sc-software kernel: EIP: 0060:[<c017960f>] EFLAGS:
00010046 CPU: 1
Feb 5 23:26:26 sc-software kernel: EIP is at kfree+0x8f/0xa0
Feb 5 23:26:26 sc-software kernel: EAX: 40000000 EBX: f5915380 ECX:
c1bb4498 EDX: c1bb4498
Feb 5 23:26:26 sc-software kernel: ESI: eff354a0 EDI: f5815280 EBP:
f0067e78 ESP: f0067e68
Feb 5 23:26:26 sc-software kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000
SS: 0068
Feb 5 23:26:26 sc-software kernel: Process modprobe (pid: 6040,
ti=f0066000 task=f00b5550 task.ti=f0066000)
Feb 5 23:26:26 sc-software kernel: Stack: 00000282 f5915380 eff354a0
b7fb87b0 f0067f1c c01ac9ac 00000003 00001812
Feb 5 23:26:26 sc-software kernel: f0067e98 0805ba64 00000418
0805ba64 f0067eb4 0805ba64 00001812 00000000
Feb 5 23:26:26 sc-software kernel: f5815280 00000001 00000000
0805be7c 0805ba64 0805aa64 08048000 00000000
Feb 5 23:26:26 sc-software kernel: Call Trace:
Feb 5 23:26:26 sc-software kernel: [<c0103e5a>]
show_trace_log_lvl+0x1a/0x30
Feb 5 23:26:26 sc-software kernel: [<c0103f2a>]
show_stack_log_lvl+0x9a/0xc0
Feb 5 23:26:26 sc-software kernel: [<c01040d7>]
show_registers+0xc7/0x250
Feb 5 23:26:26 sc-software kernel: [<c010441f>] die+0x11f/0x220
Feb 5 23:26:26 sc-software kernel: [<c01045b1>] do_trap+0x91/0xd0
Feb 5 23:26:26 sc-software kernel: [<c0104859>] do_invalid_op+0x89/0xa0
Feb 5 23:26:26 sc-software kernel: [<c0657c22>] error_code+0x72/0x78
Feb 5 23:26:26 sc-software kernel: [<c01ac9ac>]
load_elf_binary+0x8cc/0xcf0
Feb 5 23:26:26 sc-software kernel: [<c0181864>]
search_binary_handler+0xc4/0x250
Feb 5 23:26:26 sc-software kernel: [<c0181b35>] do_execve+0x145/0x190
Feb 5 23:26:26 sc-software kernel: [<c0101c82>] sys_execve+0x32/0xa0
Feb 5 23:26:26 sc-software kernel: [<c0103102>] syscall_call+0x7/0xb
Feb 5 23:26:26 sc-software kernel: =======================
Feb 5 23:26:26 sc-software kernel: Code: 47 1d 00 8b 1c 86 8b 03 3b 43 04
73 11 89 7c 83 30 40 89 03 ff 75 f0 9d 58 5b 5e 5f 5d c3 89 f0 89 da e8 65
fc ff ff 8b 03 eb e2 <0f> 0b eb fe 8b 51 0c eb b7 8b 4a 0c
eb a2 8d 76 00 55 89 e5 5d
Feb 5 23:26:26 sc-software kernel: EIP: [<c017960f>] kfree+0x8f/0xa0
SS:ESP 0068:f0067e68
Feb 5 23:26:26 sc-software kernel: ---[ end trace 791c1b0a2eb87d50 ]---





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.
===========================================================
John Heil
South Coast Software
Custom firmware, device drivers and board bring up services
Ph: 1-714-774-6952
Fx: 1-714-774-7053
http://www.sc-software.com
email: [email protected]
===========================================================

2008-02-06 20:33:43

by Pekka Enberg

[permalink] [raw]
Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)

Hi,

On Feb 6, 2008 10:21 PM, <[email protected]> wrote:
> From reboot after last hang on 02/03/08, I found this...
>
> Feb 5 23:26:26 sc-software kernel: ------------[ cut here ]------------
> Feb 5 23:26:26 sc-software kernel: kernel BUG at mm/slab.c:591!
> Feb 5 23:26:26 sc-software kernel: invalid opcode: 0000 [#1] PREEMPT SMP
> Feb 5 23:26:26 sc-software kernel: Modules linked in: shpchp pci_hotplug ohci1394 ieee1394
> Feb 5 23:26:26 sc-software kernel:
> Feb 5 23:26:26 sc-software kernel: Pid: 6040, comm: modprobe Not tainted (2.6.24 #1)
> Feb 5 23:26:26 sc-software kernel: EIP: 0060:[<c017960f>] EFLAGS: 00010046 CPU: 1
> Feb 5 23:26:26 sc-software kernel: EIP is at kfree+0x8f/0xa0
> Feb 5 23:26:26 sc-software kernel: EAX: 40000000 EBX: f5915380 ECX: c1bb4498 EDX: c1bb4498
> Feb 5 23:26:26 sc-software kernel: ESI: eff354a0 EDI: f5815280 EBP: f0067e78 ESP: f0067e68
> Feb 5 23:26:26 sc-software kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> Feb 5 23:26:26 sc-software kernel: Process modprobe (pid: 6040, ti=f0066000 task=f00b5550 task.ti=f0066000)
> Feb 5 23:26:26 sc-software kernel: Stack: 00000282 f5915380 eff354a0 b7fb87b0 f0067f1c c01ac9ac 00000003 00001812
> Feb 5 23:26:26 sc-software kernel: f0067e98 0805ba64 00000418 0805ba64 f0067eb4 0805ba64 00001812 00000000
> Feb 5 23:26:26 sc-software kernel: f5815280 00000001 00000000 0805be7c 0805ba64 0805aa64 08048000 00000000
> Feb 5 23:26:26 sc-software kernel: Call Trace:
> Feb 5 23:26:26 sc-software kernel: [<c0103e5a>] show_trace_log_lvl+0x1a/0x30
> Feb 5 23:26:26 sc-software kernel: [<c0103f2a>] show_stack_log_lvl+0x9a/0xc0
> Feb 5 23:26:26 sc-software kernel: [<c01040d7>] show_registers+0xc7/0x250
> Feb 5 23:26:26 sc-software kernel: [<c010441f>] die+0x11f/0x220
> Feb 5 23:26:26 sc-software kernel: [<c01045b1>] do_trap+0x91/0xd0
> Feb 5 23:26:26 sc-software kernel: [<c0104859>] do_invalid_op+0x89/0xa0
> Feb 5 23:26:26 sc-software kernel: [<c0657c22>] error_code+0x72/0x78
> Feb 5 23:26:26 sc-software kernel: [<c01ac9ac>] load_elf_binary+0x8cc/0xcf0
> Feb 5 23:26:26 sc-software kernel: [<c0181864>] search_binary_handler+0xc4/0x250
> Feb 5 23:26:26 sc-software kernel: [<c0181b35>] do_execve+0x145/0x190
> Feb 5 23:26:26 sc-software kernel: [<c0101c82>] sys_execve+0x32/0xa0
> Feb 5 23:26:26 sc-software kernel: [<c0103102>] syscall_call+0x7/0xb

This means we pass a non-slab pointer from load_elf_binary() to
kfree() which doesn't seem likely to be a software bug reading the
code. As Hugh suggested, please run memtest86+.

2008-02-06 20:38:23

by John Heil

[permalink] [raw]
Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)

On Wed, 6 Feb 2008, Pekka Enberg wrote:

> Date: Wed, 6 Feb 2008 22:33:33 +0200
> From: Pekka Enberg <[email protected]>
> To: [email protected]
> Cc: Hugh Dickins <[email protected]>, [email protected]
> Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1)
>
> Hi,
>
> On Feb 6, 2008 10:21 PM, <[email protected]> wrote:
>> From reboot after last hang on 02/03/08, I found this...
>>
>> Feb 5 23:26:26 sc-software kernel: ------------[ cut here ]------------
>> Feb 5 23:26:26 sc-software kernel: kernel BUG at mm/slab.c:591!
>> Feb 5 23:26:26 sc-software kernel: invalid opcode: 0000 [#1] PREEMPT SMP
>> Feb 5 23:26:26 sc-software kernel: Modules linked in: shpchp pci_hotplug ohci1394 ieee1394
>> Feb 5 23:26:26 sc-software kernel:
>> Feb 5 23:26:26 sc-software kernel: Pid: 6040, comm: modprobe Not tainted (2.6.24 #1)
>> Feb 5 23:26:26 sc-software kernel: EIP: 0060:[<c017960f>] EFLAGS: 00010046 CPU: 1
>> Feb 5 23:26:26 sc-software kernel: EIP is at kfree+0x8f/0xa0
>> Feb 5 23:26:26 sc-software kernel: EAX: 40000000 EBX: f5915380 ECX: c1bb4498 EDX: c1bb4498
>> Feb 5 23:26:26 sc-software kernel: ESI: eff354a0 EDI: f5815280 EBP: f0067e78 ESP: f0067e68
>> Feb 5 23:26:26 sc-software kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>> Feb 5 23:26:26 sc-software kernel: Process modprobe (pid: 6040, ti=f0066000 task=f00b5550 task.ti=f0066000)
>> Feb 5 23:26:26 sc-software kernel: Stack: 00000282 f5915380 eff354a0 b7fb87b0 f0067f1c c01ac9ac 00000003 00001812
>> Feb 5 23:26:26 sc-software kernel: f0067e98 0805ba64 00000418 0805ba64 f0067eb4 0805ba64 00001812 00000000
>> Feb 5 23:26:26 sc-software kernel: f5815280 00000001 00000000 0805be7c 0805ba64 0805aa64 08048000 00000000
>> Feb 5 23:26:26 sc-software kernel: Call Trace:
>> Feb 5 23:26:26 sc-software kernel: [<c0103e5a>] show_trace_log_lvl+0x1a/0x30
>> Feb 5 23:26:26 sc-software kernel: [<c0103f2a>] show_stack_log_lvl+0x9a/0xc0
>> Feb 5 23:26:26 sc-software kernel: [<c01040d7>] show_registers+0xc7/0x250
>> Feb 5 23:26:26 sc-software kernel: [<c010441f>] die+0x11f/0x220
>> Feb 5 23:26:26 sc-software kernel: [<c01045b1>] do_trap+0x91/0xd0
>> Feb 5 23:26:26 sc-software kernel: [<c0104859>] do_invalid_op+0x89/0xa0
>> Feb 5 23:26:26 sc-software kernel: [<c0657c22>] error_code+0x72/0x78
>> Feb 5 23:26:26 sc-software kernel: [<c01ac9ac>] load_elf_binary+0x8cc/0xcf0
>> Feb 5 23:26:26 sc-software kernel: [<c0181864>] search_binary_handler+0xc4/0x250
>> Feb 5 23:26:26 sc-software kernel: [<c0181b35>] do_execve+0x145/0x190
>> Feb 5 23:26:26 sc-software kernel: [<c0101c82>] sys_execve+0x32/0xa0
>> Feb 5 23:26:26 sc-software kernel: [<c0103102>] syscall_call+0x7/0xb
>
> This means we pass a non-slab pointer from load_elf_binary() to
> kfree() which doesn't seem likely to be a software bug reading the
> code. As Hugh suggested, please run memtest86+.
>

Will do!... Thnx

j

.
===========================================================
John Heil
South Coast Software
Custom firmware, device drivers and board bring up services
Ph: 1-714-774-6952
Fx: 1-714-774-7053
http://www.sc-software.com
email: [email protected]
===========================================================