Up until 2.6.9, when I changed link status after the initial 
configuration, I would get a kernel OOPS.  Now with 2.6.9, I get a crash 
immediately on boot with network device configuration.   Attached is my 
boot log.


general protection fault: 0000 [1] PREEMPT
CPU 0
Modules linked in: ipt_TCPMSS ipt_REJECT iptable_filter iptable_mangle 
ipt_MASQUERADE ipt_REDIRECT ipta
Pid: 841, comm: ip Not tainted 2.6.9
RIP: 0010:[<ffffffffa00494a8>] 
<ffffffffa00494a8>{:ipt_MASQUERADE:device_cmp+152}
RSP: 0018:000001003a883c08  EFLAGS: 00010202
RAX: 82f363feffa60e02 RBX: 0000010006260d90 RCX: ffffff000032c000
RDX: ffffff000032cc40 RSI: 0000010006260d90 RDI: 0000010038077658
RBP: 0000010038077658 R08: 0000000000000000 R09: 000001003ae4ea88
R10: 0000000000000000 R11: 000001003c4aa3c0 R12: 0000000000000000
R13: ffffffffa0049410 R14: 0000000000000000 R15: 0000000000000000
FS:  0000002a959a6d40(0000) GS:ffffffff808f0d00(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000002a9582f6d0 CR3: 0000000000101000 CR4: 00000000000006e0
Process ip (pid: 841, threadinfo 000001003a882000, task 0000010037864cf0)
Stack: 0000010038077820 000001003a883c34 0000010006260d90 ffffffffa002e7ef
       0000000000000001 000000c4805da6c9 ffffffffa004a400 0000010006260d90
       0000000000000001 000001003ae2a4d8
Call Trace:<ffffffffa002e7ef>{:ip_conntrack:ip_ct_selective_cleanup+271}
       <ffffffffa0049559>{:ipt_MASQUERADE:masq_inet_event+25}
       <ffffffff801535f0>{notifier_call_chain+32} 
<ffffffff8058af01>{ipv6_add_addr+1361}
       <ffffffff8058e466>{addrconf_add_linklocal+22} 
<ffffffff8059226f>{addrconf_notify+2383}
       <ffffffff80530cf5>{rt_cache_flush+581} 
<ffffffff801535f0>{notifier_call_chain+32}
       <ffffffff804fc36c>{dev_open+124} 
<ffffffff804fde18>{dev_change_flags+104}
       <ffffffff80562755>{devinet_ioctl+773} 
<ffffffff80563e6c>{inet_ioctl+92}
       <ffffffff804f1353>{sock_ioctl+867} <ffffffff801b586d>{sys_ioctl+1117}
       <ffffffff80110f4a>{system_call+126}

Code: 48 8b 00 8b 40 50 39 85 98 01 00 00 75 12 8b 43 24 39 85 e0
RIP <ffffffffa00494a8>{:ipt_MASQUERADE:device_cmp+152} RSP 
<000001003a883c08>
 <0>Kernel panic - not syncing: Aiee, killing interrupt handler!
 <0>Rebooting in 20 seconds..cable

Scott ~ # cat /var/lib/iptables/rules-save
# Generated by iptables-save v1.2.11 on Fri Nov 12 06:33:19 2004
*nat
:PREROUTING ACCEPT [145181:13427044]
:POSTROUTING ACCEPT [48481:3068771]
:OUTPUT ACCEPT [48479:3068633]
[26:2684] -A PREROUTING -p tcp -m tcp --dport 8081 -j REDIRECT --to-ports 81
[12522:800423] -A POSTROUTING -s 10.0.3.0/255.255.255.0 -o cable -j 
MASQUERADE
COMMIT
# Completed on Fri Nov 12 06:33:19 2004
# Generated by iptables-save v1.2.11 on Fri Nov 12 06:33:19 2004
*mangle
:PREROUTING ACCEPT [5254657:6537774407]
:INPUT ACCEPT [4808824:6244772115]
:FORWARD ACCEPT [444206:292346697]
:OUTPUT ACCEPT [4842514:6158843926]
:POSTROUTING ACCEPT [5289483:6451816902]
COMMIT
# Completed on Fri Nov 12 06:33:19 2004
# Generated by iptables-save v1.2.11 on Fri Nov 12 06:33:19 2004
*filter
:INPUT ACCEPT [4808760:6244768923]
:FORWARD ACCEPT [444206:292346709]
:OUTPUT ACCEPT [4842512:6158843732]
[64:3192] -A INPUT -i cable -p tcp -m tcp --dport 3128 -j REJECT 
--reject-with icmp-admin-prohibited
[10328:493816] -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j 
TCPMSS --clamp-mss-to-pmtu
COMMIT
# Completed on Fri Nov 12 06:33:19 2004