[Bug 1886] New: Disconnecting scanner produces kernel oops
From: Martin J. Bligh (mbligh_at_aracnet.com)
Date: 01/16/04
- Previous message: Arthur Othieno: "Re: [PATCH 2.6.1-rc3] Canonically reference files in Documentation/, code comments part"
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Date: Fri, 16 Jan 2004 08:14:27 -0800 To: linux-kernel <linux-kernel@vger.kernel.org>
http://bugme.osdl.org/show_bug.cgi?id=1886
Summary: Disconnecting scanner produces kernel oops
Kernel Version: 2.6.1
Status: NEW
Severity: normal
Owner: greg@kroah.com
Submitter: galen@starline.ee
Distribution: Debian Unstable
Hardware Environment: chaintech 7aja, via kt133 chips, usb uchi
Software Environment: Debian Unstable, gcc version 3.3.3 20040110 (prerelease)
(Debian)
Problem Description: Working with obsoleted usb scanner module works fine
(scanner not supported by sane, so cant use usblib), until I disconnect scanner.
Then I get kernel oops (below) and cannot unload the module, even with with
force flag. After that, cat /proc/modules hangs too, and to get things working
again I have to boot :(
usb 1-2: USB disconnect, address 2
Unable to handle kernel NULL pointer dereference at virtual address 0000001e
printing eip:
e089d0cc
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[_end+540430148/1068260984] Not tainted
EFLAGS: 00010282
EIP is at disconnect_scanner+0x2c/0x6d [scanner]
eax: dfce73c0 ebx: dfce73d4 ecx: e089d0a0 edx: dfd67800
esi: 00000000 edi: dd0f7168 ebp: e08a0bfc esp: dfdf1e50
ds: 007b es: 007b ss: 0068
Process khubd (pid: 5, threadinfo=dfdf0000 task=c151c040)
Stack: dfce73c0 e08a0c78 dfce73c0 e08a0ce0 c02fcb5b dfce73c0 dfce73c0 dfce7400
dfce73d4 e08a0d00 c028c494 dfce73d4 dfce7400 dd0f717c dd0f7140 e089ca4f
dfce73d4 dfce73c0 dd0f717c e08a0c0c 00000000 00000000 c0235538 dd0f717c
Call Trace:
[usb_unbind_interface+123/128] usb_unbind_interface+0x7b/0x80
[device_release_driver+100/112] device_release_driver+0x64/0x70
[_end+540428487/1068260984] destroy_scanner+0x4f/0xb0 [scanner]
[kobject_cleanup+152/160] kobject_cleanup+0x98/0xa0
[usb_unbind_interface+123/128] usb_unbind_interface+0x7b/0x80
[device_release_driver+100/112] device_release_driver+0x64/0x70
[bus_remove_device+85/160] bus_remove_device+0x55/0xa0
[device_del+93/160] device_del+0x5d/0xa0
[usb_disable_device+111/176] usb_disable_device+0x6f/0xb0
[usb_disconnect+150/224] usb_disconnect+0x96/0xe0
[hub_port_connect_change+783/800] hub_port_connect_change+0x30f/0x320
[hub_port_status+67/176] hub_port_status+0x43/0xb0
[hub_events+714/832] hub_events+0x2ca/0x340
[hub_thread+45/240] hub_thread+0x2d/0xf0
[ret_from_fork+6/20] ret_from_fork+0x6/0x14
[default_wake_function+0/32] default_wake_function+0x0/0x20
[hub_thread+0/240] hub_thread+0x0/0xf0
[kernel_thread_helper+5/12] kernel_thread_helper+0x5/0xc
Code: 80 7e 1e 00 75 2e 85 f6 74 17 8d 46 3c 8b 5c 24 08 8b 74 24
Steps to reproduce:
Compile kernel with usb and usbscanner support, swich scanner on, swich scanner off.
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- Previous message: Arthur Othieno: "Re: [PATCH 2.6.1-rc3] Canonically reference files in Documentation/, code comments part"
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