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Subject[OOPS] Removing USB Bluetooth dongle Oopses 2.6.4
Date
Hello lkml!

Here comes the oops:

PREEMPT
CPU: 0
EIP: 0060:[<e1921149>] Not tainted
EIP is at urb_unlink+0x31/0x8e [usbcore]
eax: c17c069c ebx: 00000000 ecx: 00000000 edx: dec74000
esi: 00000246 edi: c17c0694 ebp: de5aa1f0 esp: dec75e14
ds: 007b es: 007b ss: 0068
Process hotplug (pid: 6150, threadinfo=dec74000 task=dfa6a100)
Stack: c17c0694 de5aa000 dec75edc c17c0694 dec75edc de5aa000 e19218af c17c0694
c17c0694 dec74000 c17c0694 e19f5db4 de5aa000 c17c0694 dec75edc dec75edc
de5aa1d0 de5aa1d0 de5aa000 dec75edc e19f5f72 de5aa000 dec75edc 00701300
Call trace:
[<e19218af>] usb_hcd_giveback_urb+0x1b/0x39 [usbcore]
[<e19f5db4>] uhci_finish_completion+0x61/0x9c [uhci_hcd]
[<e19f5f72>] uhci_irq+0x103/0x165 [uhci_hcd]
[<e1921903>] usb_hcd_irq+0x36/0x67 [usbcore]
[<c010ae8a>] handle_IRQ_event+0x3a/0x64
[<c010b1f7>] do_IRQ+0x94/0x136
[<c0116eea>] do_page_fault+0x0/0x50c
[<c0109750>] common_interrupt+0x18/0x20
[<c0116eea>] do_page_fault+0x0/0x50c
[<c0116f11>] do_page_fault+0x27/0x50c
[<c0141c0b>] unmap_vmas+0xdc/0x212
[<c01451b7>] unmap_vma+0x40/0x7d
[<c0145210>] unmap_vma_list+0x1c/0x28
[<c0145625>] do_munmap+0x146/0x183
[<c0116eea>] do_page_fault+0x0/0x50c
[<c010980d>] error_code+0x2d/0x38

Code: 89 59 04 89 0b 89 40 04 89 47 08 8b 5f 14 56 9d 8b 42 08 83
<0>Kernel panic: Fatal exception in interrupt
In interrupt handler - not syncing


Here is the modules list:

Module Size Used by
rfcomm 33820 0
l2cap 21124 3 rfcomm
hci_usb 9728 1
bluetooth 43108 3 rfcomm,l2cap,hci_usb
ide_cd 37636 0
cdrom 35872 1 ide_cd
ds 11524 2
hid 23040 0
intel_agp 15772 1
agpgart 25896 1 intel_agp
uhci_hcd 29200 0
ehci_hcd 23428 0
snd_intel8x0 28804 0
snd_ac97_codec 58756 1 snd_intel8x0
snd_mpu401_uart 6272 1 snd_intel8x0
snd_rawmidi 20128 1 snd_mpu401_uart
snd_seq_oss 31488 0
snd_seq_midi_event 6272 1 snd_seq_oss
snd_seq 50192 4 snd_seq_oss,snd_seq_midi_event
snd_seq_device 6536 3 snd_rawmidi,snd_seq_oss,snd_seq
snd_pcm_oss 48164 0
snd_pcm 84900 2 snd_intel8x0,snd_pcm_oss
snd_page_alloc 9348 2 snd_intel8x0,snd_pcm
snd_timer 21380 2 snd_seq,snd_pcm
snd_mixer_oss 17280 1 snd_pcm_oss
snd 45796 12
snd_intel8x0,snd_ac97_codec,snd_mpu401_uart,snd_rawmidi,snd_seq_oss,snd_seq_midi_event,snd_seq,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
soundcore 7392 1 snd
rtc 10552 0
usbcore 89820 6 hci_usb,hid,uhci_hcd,ehci_hcd
md5 3712 1
ipv6 228160 11
fan 4236 0
button 6296 0
thermal 16400 0
processor 24496 1 thermal
battery 10636 0
ac 5004 0
e100 29056 0
yenta_socket 14336 0
pcmcia_core 59872 2 ds,yenta_socket
unix 23472 12


You'll find the kernel config attached:

Steps to reproduce the problem:

1) Insert the usb bt dongle
2) Start the bluetooth services (rfcomm, hcid...)
3) Stop the bluetooth services
4) Extrach the dongle - Doing rmmod uhci_hcd also causes the same oops.

Notice that SCO BT support is NOT compiled into the kernel, so this is a
different oops than similar ones reported before.
After step 3 it is possible to remove rfcomm and l2cap, but hci_usb and
bluetooth seem to lock one another, making it impossible to remove them from
the running kernel.

Regards,
Silla
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