Summary: Removal of USB flash drive causes oops in khupd
Kernel Version: 2.5.68
Status: NEW
Severity: normal
Owner: greg@kroah.com
Submitter: cswingle@iarc.uaf.edu
Distribution: Debian GNU/Linux unstable (sid)
Hardware Environment: k7 desktop and PIII laptop
Software Environment: X, console mode
Problem Description: Unplugging USB flash drive causes oops in khupd, USB
support lost after oops
Steps to reproduce:
Insert a USB flash drive (type doesn't seem to matter, but I can give model info
for the three drives I've tried if you want). Mount device. Umount device.
Remove USB device from socket -- oops as follows:
#####
usb 1-1: USB disconnect, address 3
Unable to handle kernel NULL pointer dereference at virtual address 00000001
printing eip:
c01badd3
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[proc_match+19/64] Not tainted
EFLAGS: 00010286
EIP is at proc_match+0x13/0x40
eax: ffffffff ebx: c1bcd85c ecx: ffffffff edx: c11efdc8
esi: c11efdc8 edi: c1bcd88c ebp: c11efd8c esp: c11efd84
ds: 007b es: 007b ss: 0068
Process khubd (pid: 4, threadinfo=c11ee000 task=c114d320)
Stack: 00000001 c1bcd88c c11efdb4 c01bc3d2 00000001 c11efdc8 ffffffff c11efdb4
c11efdc8 c7e725e0 c11efdc8 c7e721b0 c11efde0 c0337bc2 c11efdc8 c1bcd85c
00000000 c7b20030 c7e721b0 c11efe58 c7e725e0 c7e725e0 c7b20200 c11efe58
Call Trace:
[remove_proc_entry+82/288] remove_proc_entry+0x52/0x120
[scsi_proc_host_rm+66/112] scsi_proc_host_rm+0x42/0x70
[scsi_unregister+253/576] scsi_unregister+0xfd/0x240
[scsi_remove_device+64/80] scsi_remove_device+0x40/0x50
[scsi_remove_device+64/80] scsi_remove_device+0x40/0x50
[storage_disconnect+429/785] storage_disconnect+0x1ad/0x311
[iput+99/144] iput+0x63/0x90
[storage_disconnect+0/785] storage_disconnect+0x0/0x311
[usb_device_remove+156/160] usb_device_remove+0x9c/0xa0
[device_release_driver+102/112] device_release_driver+0x66/0x70
[bus_remove_device+127/208] bus_remove_device+0x7f/0xd0
[device_del+108/176] device_del+0x6c/0xb0
[device_unregister+20/34] device_unregister+0x14/0x22
[usb_disconnect+199/352] usb_disconnect+0xc7/0x160
[usb_hub_port_connect_change+831/848] usb_hub_port_connect_change+0x33f/0x350
[usb_hub_port_status+104/176] usb_hub_port_status+0x68/0xb0
[usb_hub_events+1014/1392] usb_hub_events+0x3f6/0x570
[allow_signal+204/512] allow_signal+0xcc/0x200
[usb_hub_thread+53/240] usb_hub_thread+0x35/0xf0
[default_wake_function+0/32] default_wake_function+0x0/0x20
[usb_hub_thread+0/240] usb_hub_thread+0x0/0xf0
[kernel_thread_helper+5/24] kernel_thread_helper+0x5/0x18
Code: 0f b7 48 02 3b 4d 08 74 14 31 c0 8b 34 24 8b 7c 24 04 89 ec
<3>drivers/usb/host/uhci-hcd.c: 1060: host controller halted. very bad
#####
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