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SubjectRe: 2.5.8-pre3: kernel BUG at usb.c:849! (preempt_count 1)
On Wed, Apr 10, 2002, Duncan Sands <duncan.sands@math.u-psud.fr> wrote:
> UP x86 K6 system running 2.5.8-pre3 with preemption.
> Using usb-uhci. I got the following bug when powering off:
>
> usb.c: USB disconnect on device 3
> kernel BUG at usb.c:849!
> invalid operand: 0000
> CPU: 0
> EIP: 0010:[<cc8babe2>] Not tainted
> EFLAGS: 00010246
> eax: 00000000 ebx: cb8e2800 ecx: cb8e2550 edx: 00000002
> esi: cbc75d88 edi: cc8c7a20 ebp: ffffffff esp: cab5ff24
> ds: 0018 es: 0018 ss: 0018
> Process rmmod (pid: 1787, threadinfo=cab5e000 task=c952a6a0)
> Stack: cb8e29f8 cc8bbafe cb8e2800 cb8e25bc cb796180 cc8c79a0 0000000e 0000024c
> cb8e2800 cc8bbaad cb8e25bc cb796080 cc8ce600 c71a5000 cc8c9000 000000c4
> cb8e2400 cc8ccc7a cab5ff74 c12dc800 00000000 c01cf07f c12dc800 cc8c9000
> Call Trace: [<cc8bbafe>] [<cc8c79a0>] [<cc8bbaad>] [<cc8ce600>] [<cc8ccc7a>]
> [pci_unregister_driver+51/76] [<cc8cd176>] [<cc8ce600>] [free_module+23/192] [sys_delete_module+292/628] [syscall_call+7/11]
> Code: 0f 0b 51 03 94 42 8c cc 8b 83 cc 00 00 00 8b 40 18 53 8b 40

Could you run this through ksymoops?

> <3>error: rmmod[1787] exited with preempt_count 1

I don't like the looks of that.

JE

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