Subject: Re: [Bugme-new] [Bug 7962] New: oops in port_carrier_check

From: Stephen Hemminger <[email-masked]>
Date: Wed, 7 Feb 2007 14:09:16 -0800

On Wed, 7 Feb 2007 12:52:16 -0800
Andrew Morton <[email-masked]> wrote:

> 
> 
> Begin forwarded message:
> 
> Date: Wed, 7 Feb 2007 12:41:07 -0800
> From: [email-masked]
> To: [email-masked]
> Subject: [Bugme-new] [Bug 7962] New: oops in port_carrier_check
> 
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=7962
> 
>            Summary: oops in port_carrier_check
>     Kernel Version: 2.6.20-rc7
>             Status: NEW
>           Severity: normal
>              Owner: [email-masked]
>          Submitter: [email-masked]
> 
> 
> While playing with qemu, I got a oops in bridge (and lost keyboard) :
> 
> Feb  7 21:20:18 plop kernel: BUG: unable to handle kernel paging request at
> virtual address 6b6b6b6b
> Feb  7 21:20:18 plop kernel:  printing eip:
> Feb  7 21:20:18 plop kernel: *pde = 00000000
> Feb  7 21:20:18 plop kernel: Oops: 0000 [#1]
> Feb  7 21:20:18 plop kernel: CPU:    0
> Feb  7 21:20:19 plop kernel: EIP:    0060:[pg0+814360305/1067136000]    Not
> tainted VLI
> Feb  7 21:20:19 plop kernel: EIP:    0060:[<f0eed6f1>]    Not tainted VLI
> Feb  7 21:20:19 plop kernel: EFLAGS: 00010202   (2.6.20.0.rc7-1mdv #1)
> Feb  7 21:20:19 plop kernel: EIP is at port_carrier_check+0x22/0x75 [bridge]
> Feb  7 21:20:19 plop kernel: eax: 6b6b6b6b   ebx: 6b6b6b6b   ecx: 00000000  
> edx: 00000001
> Feb  7 21:20:19 plop kernel: esi: eb99b120   edi: 00000296   ebp: eff0bf58  
> esp: eff0bf4c
> Feb  7 21:20:19 plop kernel: ds: 007b   es: 007b   ss: 0068
> Feb  7 21:20:19 plop kernel: Process events/0 (pid: 4, ti=eff0a000 task=eff09530
> task.ti=eff0a000)
> Feb  7 21:20:19 plop kernel: Stack: cd566744 eff4e86c 00000296 eff0bf84 c012534a
> eff0bf70 00000296 eff0bfa0
> Feb  7 21:20:19 plop kernel:        eff0bfac cd566740 f0eed6cf eff4e86c eff03ec8
> eff0bfb4 eff0bfc4 c012590d
> Feb  7 21:20:19 plop kernel:        00000001 00000000 00000001 00010000 00000000
> 00000000 eff09530 c0114770
> Feb  7 21:20:19 plop kernel: Call Trace:
> Feb  7 21:20:19 plop kernel:  [show_trace_log_lvl+26/47]
> show_trace_log_lvl+0x1a/0x2f
> Feb  7 21:20:19 plop kernel:  [<c010422c>] show_trace_log_lvl+0x1a/0x2f
> Feb  7 21:20:19 plop kernel:  [show_stack_log_lvl+155/163]
> show_stack_log_lvl+0x9b/0xa3
> Feb  7 21:20:19 plop kernel:  [<c01042dc>] show_stack_log_lvl+0x9b/0xa3
> Feb  7 21:20:19 plop kernel:  [show_registers+402/616] show_registers+0x192/0x268
> Feb  7 21:20:19 plop kernel:  [<c0104476>] show_registers+0x192/0x268
> Feb  7 21:20:19 plop kernel:  [die+234/511] die+0xea/0x1ff
> Feb  7 21:20:19 plop kernel:  [<c0104636>] die+0xea/0x1ff
> Feb  7 21:20:19 plop kernel:  [do_page_fault+1111/1334] do_page_fault+0x457/0x536
> Feb  7 21:20:19 plop kernel:  [<c02c0c73>] do_page_fault+0x457/0x536
> Feb  7 21:20:19 plop kernel:  [error_code+116/128] error_code+0x74/0x80
> Feb  7 21:20:19 plop kernel:  [<c02bf624>] error_code+0x74/0x80
> Feb  7 21:20:19 plop kernel:  [run_workqueue+142/333] run_workqueue+0x8e/0x14d
> Feb  7 21:20:19 plop kernel:  [<c012534a>] run_workqueue+0x8e/0x14d
> Feb  7 21:20:19 plop kernel:  [worker_thread+260/302] worker_thread+0x104/0x12e 
> Feb  7 21:20:19 plop kernel:  [<c012590d>] worker_thread+0x104/0x12e
> Feb  7 21:20:19 plop kernel:  [kthread+163/206] kthread+0xa3/0xce
> Feb  7 21:20:19 plop kernel:  [<c0127e55>] kthread+0xa3/0xce
> Feb  7 21:20:19 plop kernel:  [kernel_thread_helper+7/16]
> kernel_thread_helper+0x7/0x10
> Feb  7 21:20:19 plop kernel:  [<c0103ed7>] kernel_thread_helper+0x7/0x10
> Feb  7 21:20:19 plop kernel:  ======================= 
> Feb  7 21:20:19 plop kernel: Code: 38 cf 89 d8 5b 5e 5f 5d c3 55 89 e5 57 56 53
> 8b b0 24 ff ff ff 0f ba 30 00 e8 d3 20 38 cf 8b 9e 40 02 00 00 85 db 74 4c 8b 46
> 2c <8b> 3b a8 10 75 0a 89 f0 e8 e2 f9 ff ff 89 43 2c 8b 47 30 f6 40 
> Feb  7 21:20:19 plop kernel: EIP: [pg0+814360305/1067136000]
> port_carrier_check+0x22/0x75 [bridge] SS:ESP 0068:eff0bf4c
> Feb  7 21:20:19 plop kernel: EIP: [<f0eed6f1>] port_carrier_check+0x22/0x75
> [bridge] SS:ESP 0068:eff0bf4c
> 
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I wonder if this is work_queue API change fallout.