Computer Crash. Output means what?

[Joel Hammer]

My ancient gateway/firewall computer (jhammer6) crashed for
no apparent reason. We were having short (< 1 sec) power
outages that evening but I have a reliable powerbackup
and I don't think that it is the problem. Neither of the
other computers crashed.

Output of uname -a:

2.4.5-win4lin #10 Fri Nov 21 22:12:11 EST 2003 i686 unknown

The ip number is 68.34.119.36. I run apache on port 80.

A simple reboot made it come back up. Here are the last
things it said when it died.

At 23:29 to 23:30, this appears in messages:

Packet log: input - eth1 PROTO=6 65.55.210.12:20552 68.34.119.36:80 L=48 S=0x20 I=2875 F=0x4000 T=113 SYN (#26)
Packet log: input - eth1 PROTO=6 65.55.210.12:20649 68.34.119.36:80 L=48 S=0x20 I=5396 F=0x4000 T=113 SYN (#26)
Packet log: input - eth1 PROTO=6 65.55.109.13:63263 68.34.119.36:80 L=48 S=0x20 I=18703 F=0x4000 T=111 SYN (#26)
Packet log: input - eth1 PROTO=6 65.55.109.13:63266 68.34.119.36:80 L=48 S=0x20 I=18715 F=0x4000 T=111 SYN (#26)

My apache log files show no error at this time, just this:

65.55.210.12 - - [11/Aug/2008:23:29:37 -0400] "GET /Baxter/slides/dscn4582.html HTTP/1.1" 304 -
65.55.210.12 - - [11/Aug/2008:23:29:39 -0400] "GET /Dulles_2004/slides/dscn4694.html HTTP/1.1" 200 1999
65.55.109.13 - - [11/Aug/2008:23:30:44 -0400] "GET /Dulles_2004/slides/dscn4694.html HTTP/1.0" 200 1999
65.55.109.13 - - [11/Aug/2008:23:30:45 -0400] "GET /Dulles_2004/styles.css HTTP/1.0" 200 1328

Then, at 23:32, this appears in messages:

Unable to handle kernel NULL pointer dereference at virtual address 00000014
printing eip:
c01389d1
*pde = 00000000
Oops: 0000
CPU:    0
eax: 00000000   ebx: e1f3e000   ecx: 00000009   edx: c08520
esi: c21fbfa4   edi: e1f3e000   ebp: 00000000   esp: c21fbf
ds: 1008   es: 1008   ss: 1008
Process ifconfig (pid: 25828, stackpage=c21fb000)
Stack: e1f3e000 00000000 c21fbfa4 c0138bfa e1f3e000 0000000
       400160ac 00000004 c012db5d 0804efa0 00000009 c21fbfa
       bffffcc4 bffffb5c fffffeff 00000000 efc762a0 0000000
Call Trace: [pipe_wait+58/164] [shmem_truncate+177/336] [lc
    635 Aug 11 23:32:20 jhammer6 kernel:
Code: f6 c1 20 75 5a 8b 40 20 85 c0 74 03 ff 40 30 89 46 04

I don't see that apache caused this crash. I am not sure
why ifconfig was running at this time. ifconfig does  not
appear in other parts of the messages file. Does anybody
know what this means, and should I start looking for
new computer?

Thanks,

Joel