2.6.2 khubd oops

[Andrei Mikhailovsky]

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If anyone interested, I have an oops everytime i use and disconnect a
scanner device (Mustec 1200 UB Plus). Here is the dmesg output. (If
required, I can produce more debuging output).

hub 3-1:1.0: new USB device on port 2, assigned address 3
drivers/usb/image/scanner.c: USB scanner device (0x05d8/0x4002) now
attached to usb/scanner0
usb 3-1.2: USB disconnect, address 3
Unable to handle kernel NULL pointer dereference at virtual address 0000001e
~ printing eip:
e18b10dc
*pde = 00000000
Oops: 0000 [#1]
CPU:    0
EIP:    0060:[<e18b10dc>]    Tainted: PF
EFLAGS: 00010282
EIP is at disconnect_scanner+0x2c/0x69 [scanner]
eax: c28dd9c0   ebx: c28dd9d4   ecx: e18b10b0   edx: 00000002
esi: 00000000   edi: cf72b0e8   ebp: e18b4bfc   esp: dfe11e50
ds: 007b   es: 007b   ss: 0068
Process khubd (pid: 5, threadinfo=dfe10000 task=c151c040)
Stack: c28dd9c0 e18b4c78 c28dd9c0 e18b4ce0 c02a02db c28dd9c0 c28dd9c0
c28dda00
~       c28dd9d4 e18b4d00 c0258854 c28dd9d4 c28dda00 cf72b0fc cf72b0c0
e18b0a5f
~       c28dd9d4 c28dd9c0 cf72b0fc e18b4c0c 00000000 00000000 c020c0f8
cf72b0fc
Call Trace:
~ [<c02a02db>] usb_unbind_interface+0x7b/0x80
~ [<c0258854>] device_release_driver+0x64/0x70
~ [<e18b0a5f>] destroy_scanner+0x4f/0xb0 [scanner]
~ [<c020c0f8>] kobject_cleanup+0x98/0xa0
~ [<c02a02db>] usb_unbind_interface+0x7b/0x80
~ [<c0258854>] device_release_driver+0x64/0x70
~ [<c0258985>] bus_remove_device+0x55/0xa0
~ [<c02578bd>] device_del+0x5d/0xa0
~ [<c02a68ff>] usb_disable_device+0x6f/0xb0
~ [<c02a0d26>] usb_disconnect+0x96/0xf0
~ [<c02a349f>] hub_port_connect_change+0x30f/0x320
~ [<c02a2dd3>] hub_port_status+0x43/0xb0
~ [<c02a377a>] hub_events+0x2ca/0x340
~ [<c02a381d>] hub_thread+0x2d/0xf0
~ [<c010925e>] ret_from_fork+0x6/0x14
~ [<c011bb60>] default_wake_function+0x0/0x20
~ [<c02a37f0>] hub_thread+0x0/0xf0
~ [<c0107289>] kernel_thread_helper+0x5/0xc

Code: 80 7e 1e 00 75 2a 85 f6 74 1a 8d 46 3c 8b 5c 24 08 8b 74 24



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Andrei Mikhailovsky
Arhont Ltd

Web: http://www.arhont.com
Tel: +44 (0)870 4431337
Fax: +44 (0)1454 201200
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