James Morris wrote:

On 2006年5月15日, Matt Ayres wrote:

I had initially sent my traces to the Xen guys. They have not stated it is
NOT specific to Xen, just that's it's unlikely. I did not experience the
problem with kernel 2.6.12, just with 2.6.16 (up to .13 bugfix release). I
have completely disabled all support for SCTP (protocol/netfilter/conntrack)
as I know it is still quite buggy. I know Xen touches the network code a lot,
but nothing specific to iptables. I had contacted them twice before LKML as I
didn't want to post patch specific problems here. I have no other patches
applied besides the Xen patch.
My ruleset is pretty bland. 2 rules in the raw table to tell the system to
only track my forwarded ports, 2 rules in the nat table for forwarding
(intercepting) 2 ports, and then in the FORWARD tables 2 rules per VM to just
account traffic.

Can you try using a different NIC?

Here is another that just crashed:
>>EIP; c03d96a9 <ipt_do_table+ad/2d0> <=====
>>esp; c0517d8c <init_thread_union+1d8c/2000>
Trace; c03acc04 <ip_forward_finish+0/36>
Trace; c03da724 <ipt_hook+1c/20>
Trace; c03a2e50 <nf_iterate+2c/5e>
Trace; c03acc04 <ip_forward_finish+0/36>
Trace; c03acc04 <ip_forward_finish+0/36>
Trace; c03a2f4b <nf_hook_slow+3c/c3>
Trace; c03acc04 <ip_forward_finish+0/36>
Trace; c03acdd8 <ip_forward+19e/22e>
Trace; c03acc04 <ip_forward_finish+0/36>
Trace; c03abcf7 <ip_rcv+40e/48f>
Trace; c037dcb5 <netif_receive_skb+255/294>
Trace; c02e82e6 <tg3_poll+532/76c>
Trace; c037bd82 <net_rx_action+aa/17c>
Trace; c011ea17 <__do_softirq+73/f0>
Trace; c011ead4 <do_softirq+40/64>
Trace; c010606b <do_IRQ+1f/25>
Trace; c02fc87f <evtchn_do_upcall+60/96>
Trace; c0104a2c <hypervisor_callback+2c/34>
Trace; c010342e <xen_idle+5e/7d>
Trace; c0103509 <cpu_idle+bc/d5>
Trace; c05184e0 <start_kernel+344/34b>
Code; c03d96a9 <ipt_do_table+ad/2d0>
00000000 <_EIP>:
Code; c03d96a9 <ipt_do_table+ad/2d0> <=====
 0: 89 44 24 18 mov %eax,0x18(%esp) <=====
Code; c03d96ad <ipt_do_table+b1/2d0>
 4: 89 c6 mov %eax,%esi
Code; c03d96af <ipt_do_table+b3/2d0>
 6: 8b 44 24 40 mov 0x40(%esp),%eax
Code; c03d96b3 <ipt_do_table+b7/2d0>
 a: 8b 6c 24 18 mov 0x18(%esp),%ebp
Code; c03d96b7 <ipt_do_table+bb/2d0>
 e: 03 74 83 0c add 0xc(%ebx,%eax,4),%esi
Code; c03d96bb <ipt_do_table+bf/2d0>
 12: 03 6c 83 20 add 0x20(%ebx,%eax,4),%ebp
Code; c03d96bf <ipt_do_table+c3/2d0>
 16: c7 44 24 00 00 00 00 movl 0ドルx0,0x0(%esp)
Code; c03d96c6 <ipt_do_table+ca/2d0>
 1d: 00

Thanks,
Matt Ayres
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