Re: 2.5.8-pre3: kernel BUG at usb.c:849! (preempt_count 1)

Duncan Sands (duncan.sands@math.u-psud.fr)
Wed, 10 Apr 2002 19:11:41 +0200


Ok, I got a new oops, which I could decode:

ksymoops 2.4.5 on i586 2.5.8-pre3. Options used
-V (default)
-k /var/log/ksymoops/20020410185940.ksyms (specified)
-l /var/log/ksymoops/20020410185940.modules (specified)
-o /lib/modules/2.5.8-pre3/ (specified)
-m /boot/System.map-2.5.8-pre3 (specified)

kernel BUG at usb.c:849!
invalid operand: 0000
CPU: 0
EIP: 0010:[<cc8babe2>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 00000000 ebx: cb987800 ecx: cb987550 edx: 00000002
esi: c962c588 edi: cc8c7a20 ebp: ffffffff esp: c93bff24
ds: 0018 es: 0018 ss: 0018
Stack: cb9879f8 cc8bbafe cb987800 cb9875bc cb763180 cc8c79a0 0000000e 0000024c
cb987800 cc8bbaad cb9875bc cb763080 cc8ce600 c991e000 cc8c9000 000000c4
cb987400 cc8ccc7a c93bff74 c12dc800 00000000 c01cf07f c12dc800 cc8c9000
Call Trace: [<cc8bbafe>] [<cc8c79a0>] [<cc8bbaad>] [<cc8ce600>] [<cc8ccc7a>]
Code: 0f 0b 51 03 94 42 8c cc 8b 83 cc 00 00 00 8b 40 18 53 8b 40

>>EIP; cc8babe2 <[usbcore]usb_free_dev+26/5c> <=====

>>ebx; cb987800 <_end+b6a64e0/c589ce0>
>>ecx; cb987550 <_end+b6a6230/c589ce0>
>>esi; c962c588 <_end+934b268/c589ce0>
>>edi; cc8c7a20 <[usbcore]usbdevfs_driver+20/40>
>>ebp; ffffffff <END_OF_CODE+337319bc/????>
>>esp; c93bff24 <_end+90dec04/c589ce0>

Trace; cc8bbafe <[usbcore]usb_disconnect+156/160>
Trace; cc8c79a0 <[usbcore]hub_driver+20/40>
Trace; cc8bbaad <[usbcore]usb_disconnect+105/160>
Trace; cc8ce600 <[usb-uhci]uhci_pci_driver+0/3f>
Trace; cc8ccc7a <[usb-uhci]uhci_pci_remove+2a/c0>

Code; cc8babe2 <[usbcore]usb_free_dev+26/5c>
00000000 <_EIP>:
Code; cc8babe2 <[usbcore]usb_free_dev+26/5c> <=====
0: 0f 0b ud2a <=====
Code; cc8babe4 <[usbcore]usb_free_dev+28/5c>
2: 51 push %ecx
Code; cc8babe5 <[usbcore]usb_free_dev+29/5c>
3: 03 94 42 8c cc 8b 83 add 0x838bcc8c(%edx,%eax,2),%edx
Code; cc8babec <[usbcore]usb_free_dev+30/5c>
a: cc int3
Code; cc8babed <[usbcore]usb_free_dev+31/5c>
b: 00 00 add %al,(%eax)
Code; cc8babef <[usbcore]usb_free_dev+33/5c>
d: 00 8b 40 18 53 8b add %cl,0x8b531840(%ebx)
Code; cc8babf5 <[usbcore]usb_free_dev+39/5c>
13: 40 inc %eax

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