Hi,

Our firewall has been crashing a lot recently; it had
been working fine for months. We replaced it with another
machine but the problem remains. So it is definitely not a hardware
issue. The crashes are very random. The machine would run
for weeks without any crash but then will crash 10-15
times in a day. 

ksymoops indicates that the crash always occurs at
the same function (_free_pages) and instruction 
(lock decl 0x14(%ecx)). ksymoops output is attached.

The machine has minimal software on it. It only runs:
sshd, crond, klogd, mingetty, syslogd, apart from kernel 
daemons and init. It uses iptables for NAT.

Info about the machine:
  Distribution: Red Hat 7.1
  Kernel: 2.4.2-2smp

 The two PCs that were used: Dell Dimension L667r, and DigiLink.
  Processor: Pentium III
  Memory: 128MB

Can anyone tell us what the problem is.
Plese let me know if you need more information.

Thank you.
  
- vasu

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