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Message-ID: <41576E68.2010200@superbug.co.uk>
Date: Mon, 27 Sep 2004 02:35:36 +0100
From: James Courtier-Dutton <James@superbug.co.uk>
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To: linux-kernel@vger.kernel.org
Subject: 2.6.9-rc2 oops due to UDP packet.
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I attach an oops that causes my SMP Pentium 4 system to hang, requiring 
me to press the reset button.

It seems to be due to an error in the processing of a UDP packet.
It happens quite rarely, about once every few days, but it is certainly 
annoying.

Could anyone help me track this bug down?

James

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new login: ------------[ cut here ]------------
kernel BUG at include/asm/spinlock.h:90!
invalid operand: 0000 [#1]
PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in: md5 ipv6 ide_cd cdrom lp parport usbhid uhci_hcd usbcore e1000
CPU:    1
EIP:    0060:[<c02fecc0>]    Not tainted VLI
EFLAGS: 00010202   (2.6.9-rc2) 
EIP is at _spin_unlock+0x36/0x46
eax: 00000001   ebx: f1e8ef00   ecx: 00000002   edx: f33aa93c
esi: f33aa800   edi: f33aa93c   ebp: c213bbb4   esp: c213bbb4
ds: 007b   es: 007b   ss: 0068
Process hotwayd (pid: 13950, threadinfo=c213a000 task=db25caa0)
Stack: c213bbd4 c0298e81 f33aa800 f1e8ef00 00000000 f6dc10e4 f6dc10fc d12aae08 
       c213bc0c c02aea71 c3951f54 d12aae24 c213bc10 c02afe71 d12aae44 c213bea0 
       00000000 f6dc10d0 c3951f54 c213bc48 c3951f54 d34daf04 c213bc58 c02b0cfe 
Call Trace:
 [<c01050e7>] show_stack+0x80/0x96
 [<c010527a>] show_registers+0x15d/0x1d6
 [<c01054a8>] die+0x112/0x19d
 [<c01059a9>] do_invalid_op+0xee/0x10a
 [<c0104d01>] error_code+0x2d/0x38
 [<c0298e81>] dev_queue_xmit+0x23b/0x2d4
 [<c02aea71>] ip_finish_output+0xda/0x24c
 [<c02b0cfe>] ip_push_pending_frames+0x266/0x49a
 [<c02ce758>] udp_push_pending_frames+0x12f/0x25a
 [<c02cef22>] udp_sendmsg+0x661/0x7a9
 [<c028f99f>] sock_sendmsg+0xbf/0xe3
 [<c0290f7c>] sys_sendto+0xe8/0x107
 [<c0290fd1>] sys_send+0x36/0x38
 [<c029184d>] sys_socketcall+0x141/0x234
 [<c0104277>] syscall_call+0x7/0xb
Code: e5 75 1e 0f b6 02 84 c0 7f 21 c6 02 01 b8 00 e0 ff ff 21 e0 83 68 14 01 8b 40 08 a8 08 75 16 5d c3 0f 0b 59 00 80 05 31 c0 eb d8 <0f> 0b 5a 00 80 05 31 c0 eb d5 5d e9 c6 f5 ff ff 55 89 e5 f0 81 
 <0>Kernel panic - not syncing: Fatal exception in interrupt
 

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