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Date: Thu, 1 May 2008 14:59:42 +0200
From: "Marco Berizzi" <pupilla@...mail.com>
To: "Herbert Xu" <herbert@...dor.apana.org.au>
Cc: <netdev@...r.kernel.org>
Subject: Re: 2.6.25 crash: EIP: [<c02e2f14>] xfrm_output_resume+0x64/0x100 ss:esp 0068:c03a1e5c
Herbert Xu wrote:
> So it would appear that some netfilter rule has freed skb->dst.
> Do you have relevant netfilter rules, e.g., NAT entries
nat table is empty
> or any
> rules that might reroute the packet?
Yes indeed, this box is in the middle of a very poorly designed
network: it is the default gateway for lan clients, but it is
routing back all traffic to another lan box except for ipsec
traffic.
eth2 is internal lan and eth0 is the interface connected to
the isp router.
root@...ley:/# ip ru sh
0: from all lookup local
601: from 172.23.0.0/23 iif eth2 lookup isa
32766: from all lookup main
32767: from all lookup default
root@...ley:/# ip r s table isa
default via 172.23.1.254 dev eth2 metric 1
root@...ley:/# ip r s
88.51.228.225 dev eth0 scope link
88.51.228.224/28 dev eth1 proto kernel scope link src 88.51.228.238
172.22.1.0/24 via 88.51.228.225 dev eth0 src 172.23.2.254
172.18.1.0/24 via 88.51.228.225 dev eth0
172.25.5.0/24 via 88.51.228.225 dev eth0
172.25.1.0/24 via 88.51.228.225 dev eth0
172.21.1.0/24 via 88.51.228.225 dev eth0
172.17.1.0/24 via 88.51.228.225 dev eth0
172.23.2.0/23 via 88.51.228.225 dev eth0
172.23.0.0/23 dev eth2 proto kernel scope link src 172.23.1.8
172.16.0.0/23 via 88.51.228.225 dev eth0
127.0.0.0/8 dev lo scope link
default via 88.51.228.225 dev eth0 metric 1
root@...ley:/# ip a s
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:90:27:74:66:4c brd ff:ff:ff:ff:ff:ff
inet 88.51.228.238/28 brd 88.51.228.239 scope global eth0
inet 172.23.2.254/32 scope global eth0
3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:d0:b7:18:14:bc brd ff:ff:ff:ff:ff:ff
inet 88.51.228.238/28 brd 88.51.228.239 scope global eth1
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
link/ether 00:60:08:6d:3a:84 brd ff:ff:ff:ff:ff:ff
inet 172.23.1.8/23 brd 172.23.1.255 scope global eth2
Here is the info you asked:
root@...ley:~# iptables -nvxL -t nat
Chain PREROUTING (policy ACCEPT 72557 packets, 6148591 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 46575 packets, 3596771 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 191 packets, 26422 bytes)
pkts bytes target prot opt in out source destination
root@...ley:~# iptables -nvxL -t mangle
Chain PREROUTING (policy ACCEPT 13646213 packets, 12635102939 bytes)
pkts bytes target prot opt in out source destination
2752 2713288 MARK tcp -- eth2 * 0.0.0.0/0 172.16.0.0/12 multiport dports 20,25 MARK set 0x6e
0 0 MARK all -- * * 0.0.0.0/0 172.16.0.0/12 helper match "ftp" MARK set 0x6e
209912 10965262 MARK tcp -- eth2 * 0.0.0.0/0 172.16.0.0/12 multiport dports 1494,2598 MARK set 0x70
Chain INPUT (policy ACCEPT 7226005 packets, 8188427260 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 6413301 packets, 4441928803 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 2626545 packets, 513891469 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 8985576 packets, 4948767535 bytes)
pkts bytes target prot opt in out source destination
root@...ley:~# iptables -nvxL -t filter
Chain INPUT (policy DROP 18528 packets, 1978955 bytes)
pkts bytes target prot opt in out source destination
9788 662676 ACCEPT all -- * * 172.16.1.247 0.0.0.0/0
107544 30848205 ACCEPT all -- * * 80.204.235.254 0.0.0.0/0
0 0 ACCEPT all -- * * 127.0.0.1 127.0.0.1
3721271 4246951537 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
18232 1950857 green-me all -- eth2 * 172.23.0.0/23 0.0.0.0/0
0 0 dmz-me all -- eth1 * 88.51.228.224/28 0.0.0.0/0
3361526 3907062198 red-me all -- eth0 * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy DROP 3093 packets, 230687 bytes)
pkts bytes target prot opt in out source destination
6211800 4421683285 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
147228 15568498 ACCEPT all -- eth2 eth2 172.23.0.0/23 0.0.0.0/0
2366 220478 ACCEPT all -- * * 172.23.0.0/23 172.16.0.0/23
5774 531670 ACCEPT all -- * * 172.16.0.0/23 172.23.0.0/23
1201 90893 ACCEPT all -- * * 172.23.0.0/23 172.23.2.0/23
3114 275588 ACCEPT all -- * * 172.23.2.0/23 172.23.0.0/23
6141 505776 ACCEPT all -- * * 172.23.0.0/23 172.18.1.0/24
10018 684510 ACCEPT all -- * * 172.18.1.0/24 172.23.0.0/23
8620 755691 ACCEPT all -- * * 172.23.0.0/23 172.25.1.0/24
572 86585 ACCEPT all -- * * 172.25.1.0/24 172.23.0.0/23
2554 124898 ACCEPT all -- * * 172.23.0.0/23 172.25.5.0/24
3713 286355 ACCEPT all -- * * 172.25.5.0/24 172.23.0.0/23
66 3168 ACCEPT all -- * * 172.23.0.0/23 172.17.1.0/24
298 30003 ACCEPT all -- * * 172.17.1.0/24 172.23.0.0/23
0 0 ACCEPT all -- * * 172.23.0.0/23 172.22.1.0/24
10 2674 ACCEPT all -- * * 172.22.1.0/24 172.23.0.0/23
0 0 ACCEPT all -- * * 172.23.0.0/23 172.21.1.0/24
108 26588 ACCEPT all -- * * 172.21.1.0/24 172.23.0.0/23
0 0 ACCEPT all -- * * 172.23.0.0/23 81.113.185.96/27
0 0 ACCEPT all -- * * 81.113.185.96/27 172.23.0.0/23
30 1472 green-red all -- eth2 eth0 172.23.0.0/23 0.0.0.0/0
0 0 green-dmz all -- eth2 eth1 172.23.0.0/23 88.51.228.224/28
0 0 dmz-red all -- eth1 eth0 88.51.228.224/28 0.0.0.0/0
0 0 dmz-green all -- eth1 eth2 88.51.228.224/28 172.23.0.0/23
3063 229215 syn-flood-dmz all -- eth0 eth1 0.0.0.0/0 88.51.228.224/28
0 0 syn-flood-green all -- eth0 eth2 0.0.0.0/0 172.23.0.0/23
Chain OUTPUT (policy DROP 4866 packets, 722169 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- * * 127.0.0.1 127.0.0.1
2570465 506300871 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
36483 5204284 me-green all -- * eth2 0.0.0.0/0 172.23.0.0/23
0 0 me-dmz all -- * eth1 0.0.0.0/0 88.51.228.224/28
191 26666 me-red all -- * eth0 0.0.0.0/0 0.0.0.0/0
Chain dmz-green (1 references)
pkts bytes target prot opt in out source destination
0 0 icmp-me icmp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-unreachable
Chain dmz-me (1 references)
pkts bytes target prot opt in out source destination
Chain dmz-red (1 references)
pkts bytes target prot opt in out source destination
0 0 icmp-me icmp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * * 88.51.228.224/28 85.32.35.0/27
0 0 ACCEPT all -- * * 88.51.228.224/28 82.189.143.32/28
0 0 ACCEPT all -- * * 88.51.228.224/28 88.45.249.192/27
0 0 ACCEPT all -- * * 88.51.228.224/28 88.35.239.32/28
0 0 ACCEPT all -- * * 88.51.228.224/28 81.113.185.96/27
0 0 ACCEPT all -- * * 88.51.228.224/28 88.57.240.144/28
0 0 ACCEPT all -- * * 88.51.228.224/28 88.40.176.96/28
0 0 ACCEPT all -- * * 88.51.228.224/28 85.41.109.160/27
0 0 ACCEPT all -- * * 88.51.228.224/28 80.204.235.224/27
0 0 ACCEPT all -- * * 88.51.228.224/28 88.52.180.96/28
Chain green-dmz (1 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0
Chain green-me (1 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT icmp -- * * 172.23.1.4 0.0.0.0/0 icmp type 8
Chain green-red (1 references)
pkts bytes target prot opt in out source destination
Chain icmp-me (3 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 0
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 8
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 3
Chain me-dmz (1 references)
pkts bytes target prot opt in out source destination
Chain me-green (1 references)
pkts bytes target prot opt in out source destination
Chain me-red (1 references)
pkts bytes target prot opt in out source destination
0 0 icmp-me icmp -- * * 0.0.0.0/0 0.0.0.0/0
4 576 ACCEPT esp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 53,123
183 25850 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 53,123,500,4500,6666
Chain red-dmz (3 references)
pkts bytes target prot opt in out source destination
Chain red-green (3 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- * * 0.0.0.0/0 172.23.1.2 multiport dports 80
Chain red-me (1 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 3
179 36984 ACCEPT esp -- * * 0.0.0.0/0 0.0.0.0/0
3360694 3906910252 ACCEPT 4 -- * * 0.0.0.0/0 0.0.0.0/0
376 93408 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 multiport dports 500,4500
Chain syn-flood-dmz (1 references)
pkts bytes target prot opt in out source destination
1767 101324 red-dmz tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x02 limit: avg 1/sec burst 5
7 280 red-dmz tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x04 limit: avg 1/sec burst 5
214 66554 red-dmz udp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * * 85.32.35.0/27 88.51.228.224/28
0 0 ACCEPT all -- * * 82.189.143.32/28 88.51.228.224/28
0 0 ACCEPT all -- * * 88.45.249.192/27 88.51.228.224/28
0 0 ACCEPT all -- * * 88.35.239.32/28 88.51.228.224/28
0 0 ACCEPT all -- * * 81.113.185.96/27 88.51.228.224/28
0 0 ACCEPT all -- * * 88.57.240.144/28 88.51.228.224/28
0 0 ACCEPT all -- * * 88.40.176.96/28 88.51.228.224/28
0 0 ACCEPT all -- * * 85.41.109.160/27 88.51.228.224/28
0 0 ACCEPT all -- * * 80.204.235.224/27 88.51.228.224/28
0 0 ACCEPT all -- * * 88.52.180.96/28 88.51.228.224/28
Chain syn-flood-green (1 references)
pkts bytes target prot opt in out source destination
0 0 red-green tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x02 limit: avg 20/min burst 5
0 0 red-green tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x04 limit: avg 20/min burst 5
0 0 red-green udp -- * * 0.0.0.0/0 0.0.0.0/0
root@...ley:/# ip x p
src 172.25.1.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 85.41.109.190 dst 88.51.228.238
proto comp reqid 16386 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16385 mode transport
src 172.18.1.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 85.32.35.30 dst 88.51.228.238
proto comp reqid 16394 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16393 mode transport
src 172.21.1.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 88.35.239.46 dst 88.51.228.238
proto comp reqid 16390 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16389 mode transport
src 172.22.1.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 88.45.249.222 dst 88.51.228.238
proto comp reqid 16398 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16397 mode transport
src 172.25.5.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 88.57.240.158 dst 88.51.228.238
proto comp reqid 16402 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16401 mode transport
src 172.17.1.0/24 dst 172.23.0.0/23
dir in priority 2376
tmpl src 82.189.143.46 dst 88.51.228.238
proto comp reqid 16410 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16409 mode transport
src 172.16.0.0/23 dst 172.23.0.0/23
dir in priority 2377
tmpl src 80.204.235.254 dst 88.51.228.238
proto comp reqid 16414 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16413 mode transport
src 172.23.2.0/23 dst 172.23.0.0/23
dir in priority 2377
tmpl src 88.52.180.110 dst 88.51.228.238
proto comp reqid 16406 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16405 mode transport
src 172.23.0.0/23 dst 172.25.1.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 85.41.109.190
proto comp reqid 16386 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16385 mode transport
src 172.23.0.0/23 dst 172.21.1.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 88.35.239.46
proto comp reqid 16390 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16389 mode transport
src 172.23.0.0/23 dst 172.18.1.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 85.32.35.30
proto comp reqid 16394 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16393 mode transport
src 172.23.0.0/23 dst 172.22.1.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 88.45.249.222
proto comp reqid 16398 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16397 mode transport
src 172.23.0.0/23 dst 172.25.5.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 88.57.240.158
proto comp reqid 16402 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16401 mode transport
src 172.23.0.0/23 dst 172.17.1.0/24
dir out priority 2376
tmpl src 88.51.228.238 dst 82.189.143.46
proto comp reqid 16410 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16409 mode transport
src 172.23.0.0/23 dst 172.23.2.0/23
dir out priority 2377
tmpl src 88.51.228.238 dst 88.52.180.110
proto comp reqid 16406 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16405 mode transport
src 172.23.0.0/23 dst 172.16.0.0/23
dir out priority 2377
tmpl src 88.51.228.238 dst 80.204.235.254
proto comp reqid 16414 mode tunnel
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16413 mode transport
src 172.25.1.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 85.41.109.190 dst 88.51.228.238
proto comp reqid 16386 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16385 mode transport
src 172.18.1.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 85.32.35.30 dst 88.51.228.238
proto comp reqid 16394 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16393 mode transport
src 172.21.1.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 88.35.239.46 dst 88.51.228.238
proto comp reqid 16390 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16389 mode transport
src 172.22.1.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 88.45.249.222 dst 88.51.228.238
proto comp reqid 16398 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16397 mode transport
src 172.25.5.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 88.57.240.158 dst 88.51.228.238
proto comp reqid 16402 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16401 mode transport
src 172.17.1.0/24 dst 172.23.0.0/23
dir fwd priority 2376
tmpl src 82.189.143.46 dst 88.51.228.238
proto comp reqid 16410 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16409 mode transport
src 172.16.0.0/23 dst 172.23.0.0/23
dir fwd priority 2377
tmpl src 80.204.235.254 dst 88.51.228.238
proto comp reqid 16414 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16413 mode transport
src 172.23.2.0/23 dst 172.23.0.0/23
dir fwd priority 2377
tmpl src 88.52.180.110 dst 88.51.228.238
proto comp reqid 16406 mode tunnel
level use
tmpl src 0.0.0.0 dst 0.0.0.0
proto esp reqid 16405 mode transport
and this my rc.qos script for setting up qdisc:
root@...ley:/etc/rc.d# cat rc.qos
#!/bin/sh
#set -x
# cleaning environment
tc qdisc del dev eth0 root
# done
# 1600kbit -->> 200kbps
# 200kbit -->> 25kbps
# 400kbit -->> 50kbps
# 600kbit -->> 75kbps
# 1200kbit -->> 150kbps
# 800kbit -->> 100kbps
tc qdisc add dev eth0 root handle 1:0 htb default 11
tc class add dev eth0 parent 1:0 classid 1:1 htb rate 1700kbit ceil 1700kbit burst 15k
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 200kbit ceil 400kbit burst 5k
tc class add dev eth0 parent 1:1 classid 1:11 htb rate 600kbit ceil 1600kbit burst 5k
tc class add dev eth0 parent 1:1 classid 1:12 htb rate 800kbit ceil 1700kbit burst 15k
tc qdisc add dev eth0 parent 1:10 handle 10:0 sfq perturb 10
tc qdisc add dev eth0 parent 1:11 handle 20:0 sfq perturb 5
tc qdisc add dev eth0 parent 1:12 handle 30:0 sfq perturb 10
FW="tc filter add dev eth0 protocol ip parent 1:0 prio 1"
$FW handle 110 fw flowid 1:10
$FW handle 111 fw flowid 1:11
$FW handle 112 fw flowid 1:12
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