[Bluez-devel] kernel BUG in 2.6.20-1.2944.fc6 (add_conn/hci_sysfs)

[Bluez-devel] kernel BUG in 2.6.20-1.2944.fc6 (add_conn/hci_sysfs)

[Catalin Drula]

Hi,

I'm seeing the following oopses and eventually a kernel panic with the 
Fedora Core 6 kernel, 2.6.20-1.2944.fc6. They seem to be originating in 
the add_conn function from net/bluetooth/hci_sysfs.c

21:51:39 kernel: kobject_add failed for acl00180FF2C406 with -EEXIST, 
don't try to register things with the same name in the same directory.
21:51:39 kernel:  [<c04e571b>] kobject_add+0x165/0x18e
21:51:39 kernel:  [<c04e58d5>] kobject_set_name+0x2b/0x92
21:51:39 kernel:  [<c054ee89>] device_add+0x8b/0x49c
21:51:39 kernel:  [<c04e53da>] kobject_release+0x0/0x8
21:51:39 kernel:  [<cf887ffe>] add_conn+0x11/0x5b [bluetooth]
21:51:39 kernel:  [<c043054e>] run_workqueue+0x85/0x125
21:51:39 kernel:  [<c0618137>] _spin_lock_irqsave+0x9/0xd
21:51:39 kernel:  [<cf887fed>] add_conn+0x0/0x5b [bluetooth]
21:51:39 kernel:  [<c0430ec7>] worker_thread+0xf9/0x124
21:51:39 kernel:  [<c041e4a2>] default_wake_function+0x0/0xc
21:51:39 kernel:  [<c0430dce>] worker_thread+0x0/0x124
21:51:39 kernel:  [<c04334db>] kthread+0xb0/0xd9
21:51:39 kernel:  [<c043342b>] kthread+0x0/0xd9
21:51:39 kernel:  [<c04051a7>] kernel_thread_helper+0x7/0x10
21:51:39 kernel:  =======================
21:51:39 kernel: add_conn: Failed to register connection device

and then a few minutes later

21:54:37 kernel: BUG: warning at lib/kref.c:32/kref_get() (Tainted: PF    
)
21:54:37 kernel:  [<c04e5f07>] kref_get+0x3d/0x46
21:54:37 kernel:  [<c04e542a>] kobject_get+0xf/0x13
21:54:37 kernel:  [<c054e902>] get_device+0x10/0x19
21:54:37 kernel:  [<c054ee0a>] device_add+0xc/0x49c
21:54:37 kernel:  [<cf887ffe>] add_conn+0x11/0x5b [bluetooth]
21:54:37 kernel:  [<c043054e>] run_workqueue+0x85/0x125
21:54:37 kernel:  [<c0618137>] _spin_lock_irqsave+0x9/0xd
21:54:37 kernel:  [<cf887fed>] add_conn+0x0/0x5b [bluetooth]
21:54:37 kernel:  [<c0430ec7>] worker_thread+0xf9/0x124
21:54:37 kernel:  [<c041e4a2>] default_wake_function+0x0/0xc
21:54:37 kernel:  [<c0430dce>] worker_thread+0x0/0x124
21:54:37 kernel:  [<c04334db>] kthread+0xb0/0xd9
21:54:37 kernel:  [<c043342b>] kthread+0x0/0xd9
21:54:37 kernel:  [<c04051a7>] kernel_thread_helper+0x7/0x10
21:54:37 kernel:  =======================
21:54:37 kernel: list_add corruption. prev->next should be next 
(c070a528), but was cd94796c. (prev=cd94796c).
21:54:37 kernel: ------------[ cut here ]------------
21:54:37 kernel: kernel BUG at lib/list_debug.c:33!
21:54:37 kernel: invalid opcode: 0000 [#1]
21:54:37 kernel: SMP
21:54:37 kernel: last sysfs file: /class/net/pan0/bridge/stp_state
21:54:37 kernel: Modules linked in: rfcomm bnep l2cap bridge 
wlan_wep(F)(U) ipv6 dm_mirror dm_mod video sbs i2c_ec dock button battery ac 
parport_pc lp parport snd_via82xx gameport snd_ac97_codec ac97_bus 
snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss 
snd_pcm snd_timer
snd_page_alloc via_ircc snd_mpu401_uart irda snd_rawmidi 
wlan_scan_sta(F)(U) snd_seq_device ath_rate_sample(F)(U) snd crc_ccitt
ath_pci(F)(U) 
i2c_viapro pcspkr wlan(F)(U) ath_hal(PF)(U) soundcore i2c_core 8139cp 
8139too mii hci_usb bluetooth serio_raw ext3 jbd ehci_hcd ohci_hcd 
uhci_hcd
21:54:37 kernel: CPU:    0
21:54:37 kernel: EIP:    0060:[<c04ea145>]    Tainted: PF     VLI
21:54:37 kernel: EFLAGS: 00010296   (2.6.20-1.2944.fc6 #1)
21:54:37 kernel: EIP is at __list_add+0x48/0x5c
21:54:37 kernel: eax: 00000061   ebx: cd94796c   ecx: c06f1a90   edx: 
00000086
21:54:37 kernel: esi: cd94796c   edi: cd9479ac   ebp: cd94799c   esp: 
c12d7ed4
21:54:37 kernel: ds: 007b   es: 007b   ss: 0068
21:54:37 kernel: Process events/0 (pid: 5, ti=c12d7000 task=c12d0030 
task.ti=c12d7000)
21:54:37 kernel: Stack: c06af8c1 c070a528 cd94796c cd94796c cd947950 
cd9478a8 c04e5663 cd9478a8
21:54:37 kernel:        cd947954 cd947954 c12d7f28 c04e58d5 fffffffe 
cddd1e84 cd9478a8 cd9478a8
21:54:37 kernel:        cd9479ac cd94799c c054ee89 cd947950 c069ba98 
cd94799c c12b2358 cd9479b4
21:54:37 kernel: Call Trace:
21:54:37 kernel:  [<c04e5663>] kobject_add+0xad/0x18e
21:54:37 kernel:  [<c04e58d5>] kobject_set_name+0x2b/0x92
21:54:37 kernel:  [<c054ee89>] device_add+0x8b/0x49c
21:54:37 kernel:  [<cf887ffe>] add_conn+0x11/0x5b [bluetooth]
21:54:37 kernel:  [<c043054e>] run_workqueue+0x85/0x125
21:54:37 kernel:  [<c0618137>] _spin_lock_irqsave+0x9/0xd
21:54:37 kernel:  [<cf887fed>] add_conn+0x0/0x5b [bluetooth]

Catalin


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Re: [Bluez-devel] kernel BUG in 2.6.20-1.2944.fc6 (add_conn/hci_sysfs)

[Marcel Holtmann]

Hi Catalin,

> I'm seeing the following oopses and eventually a kernel panic with the 
> Fedora Core 6 kernel, 2.6.20-1.2944.fc6. They seem to be originating in 
> the add_conn function from net/bluetooth/hci_sysfs.c

please re-test with a 2.6.22-rc4 kernel. I might have already been
fixed. At least it shouldn't oops.

Regards

Marcel



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Re: [Bluez-devel] kernel BUG in 2.6.20-1.2944.fc6 (add_conn/hci_sysfs)

[Catalin Drula]

[-- Attachment #1.1: Type: text/plain, Size: 5851 bytes --]

Hi,

This bug still occurs with the Fedora Core 6 kernel, 2.6.22.7-57.fc6.

Sep 29 16:07:51 lexlights kernel: hci_cmd_task: hci2 command tx timeout
Sep 29 16:08:58 lexlights kernel: WARNING: at lib/kref.c:33 kref_get() (Not tainted)
Sep 29 16:08:58 lexlights kernel:  [<c04e76d8>] kref_get+0x3d/0x45
Sep 29 16:08:58 lexlights kernel:  [<c04e6b3d>] kobject_get+0xf/0x13
Sep 29 16:08:58 lexlights kernel:  [<c054fb8f>] get_device+0xe/0x14
Sep 29 16:08:58 lexlights kernel:  [<c05502e9>] device_add+0xc/0x526
Sep 29 16:08:58 lexlights kernel:  [<c04e6ae3>] kobject_cleanup+0x49/0x54
Sep 29 16:08:58 lexlights kernel:  [<c04e6aee>] kobject_release+0x0/0x8
Sep 29 16:08:58 lexlights kernel:  [<d09de72b>] find_dock+0x1e2/0x219 [dock]
Sep 29 16:08:58 lexlights kernel:  [<d007df5f>] add_conn+0x0/0x5b [bluetooth]
Sep 29 16:08:58 lexlights kernel:  [<d007df70>] add_conn+0x11/0x5b [bluetooth]
Sep 29 16:08:58 lexlights kernel:  [<c0432410>] run_workqueue+0x74/0xf7
Sep 29 16:08:58 lexlights kernel:  [<c0435427>] prepare_to_wait+0x24/0x3f
Sep 29 16:08:58 lexlights kernel:  [<c0432be2>] worker_thread+0x0/0xc6
Sep 29 16:08:58 lexlights kernel:  [<c0432c9c>] worker_thread+0xba/0xc6
Sep 29 16:08:58 lexlights kernel:  [<c04352dd>] autoremove_wake_function+0x0/0x35
Sep 29 16:08:58 lexlights kernel:  [<c0435216>] kthread+0x38/0x5e
Sep 29 16:08:58 lexlights kernel:  [<c04351de>] kthread+0x0/0x5e
Sep 29 16:08:58 lexlights kernel:  [<c0406177>] kernel_thread_helper+0x7/0x10
Sep 29 16:08:58 lexlights kernel:  =======================
Sep 29 16:09:01 lexlights kernel: hci_cmd_task: hci3 command tx timeout
Sep 29 16:09:02 lexlights kernel: list_del corruption. next->prev should be c51a9cd8, but was 4d554e51
Sep 29 16:09:02 lexlights kernel: ------------[ cut here ]------------
Sep 29 16:09:02 lexlights kernel: kernel BUG at lib/list_debug.c:72!
Sep 29 16:09:02 lexlights kernel: invalid opcode: 0000 [#1]
Sep 29 16:09:02 lexlights kernel: SMP
Sep 29 16:09:02 lexlights kernel: last sysfs file: /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.4/dev
Sep 29 16:09:02 lexlights kernel: Modules linked in: bnep rfcomm l2cap bridge ipv6 dm_mirror dm_mod video sbs button dock battery ac lp floppy snd_via82xx gameport snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss i2c_viapro snd_pcm 8139cp via686a snd_timer hwmon snd_page_alloc snd_mpu401_uart i2c_isa 8139too parport_pc snd_rawmidi parport i2c_core cyblafb snd_seq_device mii snd soundcore hci_usb bluetooth ext3 jbd mbcache ehci_hcd ohci_hcd uhci_hcd
Sep 29 16:09:02 lexlights kernel: CPU:    0
Sep 29 16:09:02 lexlights kernel: EIP:    0060:[<c04ec282>]    Not tainted VLI
Sep 29 16:09:02 lexlights kernel: EFLAGS: 00010286   (2.6.22.7-57.fc6 #1)
Sep 29 16:09:02 lexlights kernel: EIP is at list_del+0x42/0x5d
Sep 29 16:09:02 lexlights kernel: eax: 00000048   ebx: 4d554e51   ecx: 00000086   edx: 00000000
Sep 29 16:09:02 lexlights kernel: esi: c0626fef   edi: c51a9cd4   ebp: cec8d570   esp: c124bf3c
Sep 29 16:09:02 lexlights kernel: ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: 0068
Sep 29 16:09:02 lexlights kernel: Process events/0 (pid: 6, ti=c124b000 task=c1256000 task.ti=c124b000)
Sep 29 16:09:02 lexlights kernel: Stack: c06d18ba c51a9cd8 4d554e51 c51a9ce0 c0626ffa c51a9ce0 c04e768e 00000000
Sep 29 16:09:02 lexlights kernel:        c124b000 00000000 c11f8950 c1256000 cec8d570 c054fb59 c0626fbe cf7eb480
Sep 29 16:09:02 lexlights kernel:        c51a9cc0 d007df12 c054ffc5 cf7eb480 c51a9cb0 d007df12 00000000 c0432410
Sep 29 16:09:02 lexlights kernel: Call Trace:
Sep 29 16:09:02 lexlights kernel:  [<c0626ffa>] klist_release+0xb/0x1c
Sep 29 16:09:02 lexlights kernel:  [<c04e768e>] kref_put+0x72/0x7f
Sep 29 16:09:02 lexlights kernel:  [<c054fb59>] klist_children_put+0x0/0x8
Sep 29 16:09:02 lexlights kernel:  [<c0626fbe>] klist_del+0x18/0x31
Sep 29 16:09:02 lexlights kernel:  [<d007df12>] del_conn+0x0/0x8 [bluetooth]
Sep 29 16:09:02 lexlights kernel:  [<c054ffc5>] device_del+0x15/0x266
Sep 29 16:09:02 lexlights kernel:  [<d007df12>] del_conn+0x0/0x8 [bluetooth]
Sep 29 16:09:02 lexlights kernel:  [<c0432410>] run_workqueue+0x74/0xf7
Sep 29 16:09:02 lexlights kernel:  [<c0432be2>] worker_thread+0x0/0xc6
Sep 29 16:09:02 lexlights kernel:  [<c0432c9c>] worker_thread+0xba/0xc6
Sep 29 16:09:02 lexlights kernel:  [<c04352dd>] autoremove_wake_function+0x0/0x35
Sep 29 16:09:02 lexlights kernel:  [<c0435216>] kthread+0x38/0x5e
Sep 29 16:09:02 lexlights kernel:  [<c04351de>] kthread+0x0/0x5e
Sep 29 16:09:02 lexlights kernel:  [<c0406177>] kernel_thread_helper+0x7/0x10
Sep 29 16:09:02 lexlights kernel:  =======================
Sep 29 16:09:02 lexlights kernel: Code: 24 6c 18 6d c0 e8 1e a1 f3 ff 0f 0b eb fe 8b 10 8b 5a 04 39 c3 74 18 89 5c 24 08 89 44 24 04 c7 04 24 ba 18 6d c0 e8
fd a0 f3 ff <0f> 0b eb fe 89 4a 04 89 11 c7 40 04 00 02 20 00 c7 00 00 01 10
Sep 29 16:09:02 lexlights kernel: EIP: [<c04ec282>] list_del+0x42/0x5d SS:ESP 0068:c124bf3c

Catalin

Marcel Holtmann <marcel <at> holtmann.org> writes:

> 
> Hi Catalin,
> 
> > I'm seeing the following oopses and eventually a kernel panic with the 
> > Fedora Core 6 kernel, 2.6.20-1.2944.fc6. They seem to be originating in 
> > the add_conn function from net/bluetooth/hci_sysfs.c
> 
> please re-test with a 2.6.22-rc4 kernel. I might have already been
> fixed. At least it shouldn't oops.
> 
> Regards
> 
> Marcel
> 
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> control of your XML. No limits. Just data. Click to get it now.
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Re: [Bluez-devel] kernel BUG in 2.6.20-1.2944.fc6 (add_conn/hci_sysfs)

[Marcel Holtmann]

Hi Catalin,

> This bug still occurs with the Fedora Core 6 kernel, 2.6.22.7-57.fc6.

any chance you retest this with a 2.6.23-rc9 kernel. There have been
additional fixes in the sysfs area and in the Bluetooth core. I do think
we fixed this, but I might be mistaken.

Regards

Marcel



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