Linux-kernel mailing list archive 2000-47,: Re: [Linux-IrDA]IrDA broken on pre-5/6 and stock 2.4.0-test11

# Re: [Linux-IrDA]IrDA broken on pre-5/6 and stock 2.4.0-test11

Dag Brattli (dagb@fast.no)
Mon, 20 Nov 2000 19:17:57 GMT

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Hi,

I also get this kernel panic with the latest kernel (test11-pre5/6)
but I didn't get it with any earlier kernels. I don't think this has anything to do
with Linux-IrDA but maybe I'm wrong.

-- Dag

On Mon, 20 Nov 2000 16:57:30 +0400 (GMT-4), you wrote:
> Guys,
>
> can someone confirm the following. I can reliably get my
> kernel to panic if i kill irattach. I use SIR mode on my
> laptop. Looks like lack of NULL checking in the kernel
> code, but someone please try it out. Don't worry the
> panic is not fatal - i.e. it won't crash your machine or
> at least it doesn't mine..
>
> So just a
> kill <PID of irattach>
> will kernel core. Look in your 'dmesg' output.
>
> Thanx
> Mitch
>
> Here is my traceback
>
> Unable to handle kernel NULL pointer dereference at virtual address 00000008
> c011578c
> *pde = 00000000
> Oops: 0000
> CPU: 0
> EIP: 0010:[<c011578c>]
> EFLAGS: 00210246
> eax: c2124a64 ebx: c1414000 ecx: c35c01e0 edx: 00000000
> esi: 00000006 edi: 00000000 ebp: c3fcb3a0 esp: c1415fb8
> ds: 0018 es: 0018 ss: 0018
> Process irattach (pid: 5497, stackpage=c1415000)
> Stack: 00000100 c357bdc0 c357bdf0 c3498000 c35c01e0 c3fcb3a0 c3f9ca40 c3f9ca40
> c3f9ca40 c3f9ca40 c0115a80 c025c620 c357be80 c357be6c c0108914 c357bdf0
> 00000078 c357be80
> Call Trace: [<c0115a80>] [<c0108914>]
> Code: 8b 4f 08 39 ca 7d 22 8b 47 14 83 3c 90 00 74 14 89 f0 89 d3
> Warning: trailing garbage ignored on Code: line
> Text: 'Code: 8b 4f 08 39 ca 7d 22 8b 47 14 83 3c 90 00 74 14 89 f0 89 d3 '
> Garbage: ' '
>
> >>EIP: c011578c <exec_usermodehelper+29c/368>
> Trace: c0115a80 <exec_helper+14/18>
> Trace: c0108914 <kernel_thread+28/38>
> Code: c011578c <exec_usermodehelper+29c/368> 00000000 <_EIP>: <===
> Code: c011578c <exec_usermodehelper+29c/368> 0: 8b 4f 08 mov 0x8(%edi),%ecx <===
> Code: c011578f <exec_usermodehelper+29f/368> 3: 39 ca cmp %ecx,%edx
> Code: c0115791 <exec_usermodehelper+2a1/368> 5: 7d 22 jge c01157b5 <exec_usermodehelper+2c5/368>
> Code: c0115793 <exec_usermodehelper+2a3/368> 7: 8b 47 14 mov 0x14(%edi),%eax
> Code: c0115796 <exec_usermodehelper+2a6/368> a: 83 3c 90 00 cmpl $0x0,(%eax,%edx,4)
> Code: c011579a <exec_usermodehelper+2aa/368> e: 74 14 je c01157b0 <exec_usermodehelper+2c0/368>
> Code: c011579c <exec_usermodehelper+2ac/368> 10: 89 f0 mov %esi,%eax
> Code: c011579e <exec_usermodehelper+2ae/368> 12: 89 d3 mov %edx,%ebx
>
> _______________________________________________
> Linux-IrDA mailing list - Linux-IrDA@pasta.cs.UiT.No
> http://www.pasta.cs.UiT.No/mailman/listinfo/linux-irda
>
>
>
>
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