Patrick McHardy
======= 2008-01-30 01:59:03 =======
>Jan Engelhardt wrote:
>> On Jan 29 2008 18:32, fenglg wrote:
>>> I use linux-2.6.18, and there is a bridge with eth0 and eth1. The eth0 and
>>> eth1 connetcswitchs which use vlan trunk(802.1q). When i run system some
>>> hours, the kernel is crash, anyone can help me.
>>>
>>> BUG: unable to handle kernel NULL pointer dereference at virtual address 00000010
>>> EIP is at br_nf_pre_routing_finish+0x1d/0x340
>>> eax: c16e7980 ebx: 00000000 ecx: 00000001 edx: c16e7980
>>> esi: de4cb020 edi: c0456520 ebp: de8d2000 esp: c03fbce4
>>> Code: 10 01 e9 7a ff ff ff 8d b4 26 00 00 00 00 55 57 56 53 81 ec c0 00 00 00 8b
>>> 94 24 d4 00 00 00 8b 9a 80 00 00 00 8b 6a 14 8b 72 20 <8b> 43 10 a8 01 74 14 0f
>>> b6 42 75 24 f8 0c 03 88 42 75 8b 43 10
>>
>> Thanks for the report.
>>
>> All signs point to skb->nf_bridge being NULL.
>>
>> static int br_nf_pre_routing_finish(struct sk_buff *skb)
>> {
>> struct net_device *dev = skb->dev;
>> struct iphdr *iph = ip_hdr(skb);
>> struct nf_bridge_info *nf_bridge = skb->nf_bridge;
>> int err;
>>
>> boom-> if (nf_bridge->mask & BRNF_PKT_TYPE) {
>>
>>
>> Hm... now what? :)
>
>
>2.6.18 and 2.6.24 differ significantly in how the bridging stuff
>is handled, so the preferred way would be to try to reproduce this
>with 2.6.24. Debugging a 18 month old kernel doesn't seem too
>useful unless we know the problem is still present.
= = = = = = = = = = = = = = = = = = = =
Call Trace:
[<c02f0f53>] icmp_packet+0xc3/0xd0
[<e081854b>] ip_nat_fn+0x7b/0x1f0 [iptable_nat]
[<c030f140>] br_nf_pre_routing_finish+0x0/0x340
I think there is some wrong in icmp_packet, the icmp_packet is used in ip_conntrack_in. I will try linux-2.6.24 later. Thanks!
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