Hello!
I experience a lot of troubles with uhci driver driver, in different kernels.
Usually it just panics on device insertion or removal, but this time I got
lucky, and oops was not fatal, so here it is decoded. As I can see,
something stomped on usb_device structure of unplugged device.
(do not sugget to use usb-uhci driver, it work even worse for me).
Device that's unplugged is compaq ipaq, driver used is usbnet.c
Host is USB built into Sony Vaio:
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
That's what I have in logs prior to oops:
Mar 9 19:32:21 notebook1 kernel: usb0: register usbnet 001/009, Linux Device
Mar 9 21:11:31 notebook1 kernel: usb.c: USB disconnect on device 1043477052
Here is oops (decoded):
ksymoops 2.3.5 on i686 2.4.2-ac16. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.2-ac16/ (default)
-m /usr/src/linux/System.map (default)
Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.
Warning (compare_maps): mismatch on symbol __module_author , usbnet says c89338c0,
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o says c893472c. Ignoring
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o entry
Warning (compare_maps): mismatch on symbol __module_description , usbnet says
c8933900, /lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o says c893476c. Ignoring
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o entry
Reading Oops report from the terminal
Unable to handle kernel paging request at virtual address bde87719
c018cb8b
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c018cb8b>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 0000002e ebx: 0000000a ecx: c06e6e00 edx: bde87715
esi: 00000100 edi: 00000001 ebp: 00000000 esp: c127bf60
ds: 0018 es: 0018 ss: 0018
Process khubd (pid: 9, stackpage=c127b000)
Stack: 0000000a 00000100 00000001 00000003 c018ec53 c06e6e00 c018ec92 c7f838ec
00030100 00000000 00000001 00000003 00000000 c7f838ec c7f838ec 00000000
c127bfdc 00000004 00000064 c018f010 c7f83800 00000000 c127bfdc c127a000
Call Trace: [<c018ec53>] [<c018ec92>] [<c018f010>] [<c018f1b5>] [<c0105000>]
[<c010744f>]
Code: 80 7a 04 00 74 6f c7 44 24 10 00 00 00 00 8d b4 26 00 00 00
>>EIP; c018cb8b <usb_disconnect+3f/124> <=====
Trace; c018ec53 <usb_hub_port_connect_change+2b/2f0>
Trace; c018ec92 <usb_hub_port_connect_change+6a/2f0>
Trace; c018f010 <usb_hub_events+f8/278>
Trace; c018f1b5 <usb_hub_thread+25/44>
Trace; c0105000 <empty_bad_page+0/1000>
Trace; c010744f <kernel_thread+23/30>
Code; c018cb8b <usb_disconnect+3f/124>
00000000 <_EIP>:
Code; c018cb8b <usb_disconnect+3f/124> <=====
0: 80 7a 04 00 cmpb $0x0,0x4(%edx) <=====
Code; c018cb8f <usb_disconnect+43/124>
4: 74 6f je 75 <_EIP+0x75> c018cc00
<usb_disconnect+b4/124>
Code; c018cb91 <usb_disconnect+45/124>
6: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp,1)
Code; c018cb98 <usb_disconnect+4c/124>
d: 00
Code; c018cb99 <usb_disconnect+4d/124>
e: 8d b4 26 00 00 00 00 lea 0x0(%esi,1),%esi
3 warnings issued. Results may not be reliable.
Bye,
Oleg
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