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SubjectRe: Repeatable lockup on SMP w/usbprocfs
I've enabled spinlock debugging, and generated a nice oops...  The USB 
system is definately doing something wrong somewhere.


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ksymoops 2.3.7 on i686 2.4.2-ac26. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.2-ac26/ (default)
-m /boot/ (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.

eip: d28eb1b5
kernel BUG at /usr/src/linux/include/asm/spinlock.h:90!
invalid operand: 0000
CPU: 1
EIP: 0010:[<d28eb1dc>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010086
eax: 00000038 ebx: cff44710 ecx: c0264ba0 edx: 00004e26
esi: cda794bc edi: cff44680 ebp: ffffffea esp: cd28ded8
ds: 0018 es: 0018 ss: 0018
Process mgmt (pid: 408, stackpage=cd28d000)
Stack: d28edae0 0000005a cda793c8 cda794a0 cda793a0 00000286 cda794c8 cff44710
00000292 cff44680 d28d90e6 cda794bc d28deb1f cda794bc cda793a0 bffffc70
<4>fffffdfd cfb69940 00000002 00000000 00000000 00008103 00000000 00000000
Call Trace: [<d28edae0>] [<d28d90e6>] [<d28deb1f>] [<d28df627>] [<c014d588>] [<c014d588>] [<c010756b>]
Code: 0f 0b 83 c4 08 f0 fe 0e 88 ee 27 00 00 8b 46 20 83 f8 8d

>>EIP; d28eb1dc <[uhci]uhci_submit_urb+134/3fc> <=====
Trace; d28edae0 <[uhci].rodata.start+20/110c>
Trace; d28d90e6 <[usbcore]usb_submit_urb+1e/30>
Trace; d28deb1f <[usbcore]proc_submiturb+56f/64c>
Trace; d28df627 <[usbcore]usbdev_ioctl+1ef/298>
Trace; c014d588 <file_ioctl+148/15c>
Trace; c014d588 <file_ioctl+148/15c>
Trace; c010756b <system_call+33/38>
Code; d28eb1dc <[uhci]uhci_submit_urb+134/3fc>
00000000 <_EIP>:
Code; d28eb1dc <[uhci]uhci_submit_urb+134/3fc> <=====
0: 0f 0b ud2a <=====
Code; d28eb1de <[uhci]uhci_submit_urb+136/3fc>
2: 83 c4 08 add $0x8,%esp
Code; d28eb1e1 <[uhci]uhci_submit_urb+139/3fc>
5: f0 fe 0e lock decb (%esi)
Code; d28eb1e4 <[uhci]uhci_submit_urb+13c/3fc>
8: 88 ee mov %ch,%dh
Code; d28eb1e6 <[uhci]uhci_submit_urb+13e/3fc>
a: 27 daa
Code; d28eb1e7 <[uhci]uhci_submit_urb+13f/3fc>
b: 00 00 add %al,(%eax)
Code; d28eb1e9 <[uhci]uhci_submit_urb+141/3fc>
d: 8b 46 20 mov 0x20(%esi),%eax
Code; d28eb1ec <[uhci]uhci_submit_urb+144/3fc>
10: 83 f8 8d cmp $0xffffff8d,%eax

1 warning issued. Results may not be reliable.
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