Public bug reported:
Running Ubuntu 12.04 32-bit under Xen and trying to remove VIF cause a
crash.
This is the information on crash
Ubuntu 12.04 LTS ubuntu1204 hvc0
ubuntu1204 login: [ 695.280121] WARNING: g.e. still in use!
[ 695.280133] WARNING: g.e. still in use!
[ 695.280153] sysfs: kobject eth6 without dirent
[ 695.280269] sysfs: kobject eth6 without dirent
[ 695.280359] sysfs: kobject eth6 without dirent
[ 695.280483] BUG: unable to handle kernel paging request at 2b2c3000
[ 695.280493] IP: [<c14bb1c7>] linkwatch_do_dev+0x77/0xb0
[ 695.280503] *pdpt = 000000002b878007 *pde = 0000000000000000
[ 695.280511] Oops: 0002 [#1] SMP
[ 695.280518] Modules linked in: xenfs lp parport
[ 695.280527]
[ 695.280531] Pid: 21, comm: kworker/0:1 Tainted: G W
3.2.0-26-generic-pae #41-Ubuntu
[ 695.280542] EIP: 0061:[<c14bb1c7>] EFLAGS: 00010246 CPU: 0
[ 695.280548] EIP is at linkwatch_do_dev+0x77/0xb0
[ 695.280554] EAX: 00000000 EBX: c3020000 ECX: 00000000 EDX: 00000000
[ 695.280560] ESI: 00000002 EDI: 00000000 EBP: ec113f2c ESP: ec113f24
[ 695.280566] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 695.280572] Process kworker/0:1 (pid: 21, ti=ec112000 task=ec118000
task.ti=ec112000)
[ 695.280579] Stack:
[ 695.280582] c302026c ec113f38 ec113f4c c14bb482 ec113f44 ec113f38 ec113f38
c1860120
[ 695.280597] ecbeb7ec ec0c3640 ec113f54 c14bb560 ec113f94 c1074de1 ec0700e0
00040001
[ 695.280611] c1002227 00000061 00000246 ecbf0d05 000c3640 c14bb540 ecbf0d00
ecbeb780
[ 695.280625] Call Trace:
[ 695.280631] [<c14bb482>] __linkwatch_run_queue+0xd2/0x190
[ 695.280638] [<c14bb560>] linkwatch_event+0x20/0x30
[ 695.280645] [<c1074de1>] process_one_work+0x101/0x3a0
[ 695.280654] [<c1002227>] ? hypercall_page+0x227/0x1000
[ 695.280661] [<c14bb540>] ? __linkwatch_run_queue+0x190/0x190
[ 695.280668] [<c10758a4>] worker_thread+0x124/0x2d0
[ 695.280675] [<c1075780>] ? manage_workers.isra.27+0x110/0x110
[ 695.280683] [<c10796cd>] kthread+0x6d/0x80
[ 695.280689] [<c1079660>] ? flush_kthread_worker+0x80/0x80
[ 695.280697] [<c15acc3e>] kernel_thread_helper+0x6/0x10
[ 695.280703] Code: 85 c1 e8 7d a1 0e 00 f6 83 ec 00 00 00 01 74 15 8b 43 44
a8 04 89 d8 74 2b e8 66 ae 00 00 89 d8 e8 7f f6 fe ff 8b 83 58 02 00 00 <64> ff
08 5b 5e 5d c3 66 90 8b 73 44 c1 e6 1b c1 fe 1f 83 c6 06
[ 695.280777] EIP: [<c14bb1c7>] linkwatch_do_dev+0x77/0xb0 SS:ESP 0069:ec113f24
[ 695.280787] CR2: 000000002b2c3000
[ 695.280798] ---[ end trace 11df0f4e76838620 ]---
[ 695.280836] BUG: unable to handle kernel paging request at fffffffc
[ 695.280845] IP: [<c1079a6f>] kthread_data+0xf/0x20
[ 695.280853] *pdpt = 000000002b875027 *pde = 0000000000000000
[ 695.280862] Oops: 0000 [#2] SMP
[ 695.280868] Modules linked in: xenfs lp parport
[ 695.280877]
[ 695.280881] Pid: 21, comm: kworker/0:1 Tainted: G D W
3.2.0-26-generic-pae #41-Ubuntu
[ 695.280892] EIP: 0061:[<c1079a6f>] EFLAGS: 00010002 CPU: 0
[ 695.280898] EIP is at kthread_data+0xf/0x20
[ 695.280903] EAX: 00000000 EBX: 00000000 ECX: c192ce00 EDX: 00000000
[ 695.280909] ESI: 00000000 EDI: 00000009 EBP: ec113d20 ESP: ec113d14
[ 695.280916] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069
[ 695.280922] Process kworker/0:1 (pid: 21, ti=ec112000 task=ec118000
task.ti=ec112000)
[ 695.280929] Stack:
[ 695.280933] c1075ce1 ec118294 00000000 ec113da4 c15a350f ed17e980 ec113d40
c107677a
[ 695.280946] c1058c88 c192ce00 c192ce00 ec0ce4c0 ec0a9400 ecbefe00 ec118000
c1058c88
[ 695.280959] ec118000 ec113d88 c105ce15 00000000 97933b01 ec0c3690 c10c4fcc
ec0c3680
[ 695.280972] Call Trace:
[ 695.280977] [<c1075ce1>] ? wq_worker_sleeping+0x11/0x80
[ 695.280985] [<c15a350f>] __schedule+0x51f/0x620
[ 695.280991] [<c107677a>] ? free_pid+0x8a/0x90
[ 695.280998] [<c1058c88>] ? __cleanup_sighand+0x28/0x30
[ 695.281004] [<c1058c88>] ? __cleanup_sighand+0x28/0x30
[ 695.281012] [<c105ce15>] ? __exit_signal+0x225/0x300
[ 695.281021] [<c10c4fcc>] ? __call_rcu+0x7c/0x120
[ 695.281027] [<c10c50a2>] ? call_rcu_sched+0x12/0x20
[ 695.281034] [<c105d46c>] ? release_task+0xac/0x110
[ 695.281041] [<c15a38b5>] schedule+0x35/0x50
[ 695.281047] [<c105e94f>] do_exit+0x1ef/0x390
[ 695.281056] [<c158f6ca>] ? printk+0x2d/0x2f
[ 695.281064] [<c15a6556>] oops_end+0x96/0xd0
[ 695.281070] [<c158e581>] no_context+0xc3/0xcb
[ 695.281077] [<c158e6a9>] __bad_area_nosemaphore+0x120/0x128
[ 695.281086] [<c1009729>] ? xen_clocksource_read+0x19/0x20
[ 695.281093] [<c158e6c8>] bad_area_nosemaphore+0x17/0x19
[ 695.281100] [<c15a8d1a>] do_page_fault+0x3da/0x490
[ 695.281107] [<c1005287>] ? xen_mc_extend_args+0xd7/0x110
[ 695.281114] [<c1004f6a>] ? xen_mc_flush+0xaa/0x1b0
[ 695.281120] [<c1004929>] ? xen_load_tls+0x89/0x120
[ 695.281127] [<c1003aa7>] ? xen_end_context_switch+0x17/0x20
[ 695.281134] [<c15a8940>] ? vmalloc_fault+0x190/0x190
[ 695.281141] [<c15a5d07>] error_code+0x67/0x6c
[ 695.284069] [<c15a00d8>] ? powernow_k8_cpu_init_acpi+0x88/0x186
[ 695.284069] [<c14bb1c7>] ? linkwatch_do_dev+0x77/0xb0
[ 695.284069] [<c14bb482>] __linkwatch_run_queue+0xd2/0x190
[ 695.284069] [<c14bb560>] linkwatch_event+0x20/0x30
[ 695.284069] [<c1074de1>] process_one_work+0x101/0x3a0
[ 695.284069] [<c1002227>] ? hypercall_page+0x227/0x1000
[ 695.284069] [<c14bb540>] ? __linkwatch_run_queue+0x190/0x190
[ 695.284069] [<c10758a4>] worker_thread+0x124/0x2d0
[ 695.284069] [<c1075780>] ? manage_workers.isra.27+0x110/0x110
[ 695.284069] [<c10796cd>] kthread+0x6d/0x80
[ 695.284069] [<c1079660>] ? flush_kthread_worker+0x80/0x80
[ 695.284069] [<c15acc3e>] kernel_thread_helper+0x6/0x10
[ 695.284069] Code: 10 31 c0 5b 5e 5f 5d c3 ba 3e 01 00 00 b8 e8 b9 74 c1 e8
55 0c fe ff e9 bb fe ff ff 55 89 e5 3e 8d 74 26 00 8b 80 68 02 00 00 5d <8b> 40
fc c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 3e
[ 695.284069] EIP: [<c1079a6f>] kthread_data+0xf/0x20 SS:ESP 0069:ec113d14
[ 695.284069] CR2: 00000000fffffffc
[ 695.284069] ---[ end trace 11df0f4e76838621 ]---
[ 695.284069] Fixing recursive fault but reboot is needed!
Regards
Frediano Ziglio
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: precise
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https://bugs.launchpad.net/bugs/1023795
Title:
Crash removing VIF inferface
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