xt_opendpi: ignoring untracked sk_buff

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What steps will reproduce the problem?
iptables -F -t mangle
iptables -t mangle -A PREROUTING -p udp -j CONNMARK --restore-mark
iptables -t mangle -A PREROUTING -p tcp -j CONNMARK --restore-mark

iptables -t mangle -A PREROUTING -p udp -m mark ! --mark 0 -j ACCEPT
iptables -t mangle -A PREROUTING -p tcp -m mark ! --mark 0 -j ACCEPT

iptables -t mangle -A PREROUTING -p udp -m opendpi --sip -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p udp -m opendpi --iax -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p udp -m opendpi --mgcp -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p udp -m opendpi --truphone -j MARK 
--set-mark 1
iptables -t mangle -A PREROUTING -p udp -m opendpi --rtp -j MARK --set-mark 1

iptables -t mangle -A PREROUTING -p tcp -m opendpi --sip -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p tcp -m opendpi --iax -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p tcp -m opendpi --mgcp -j MARK --set-mark 1
iptables -t mangle -A PREROUTING -p tcp -m opendpi --truphone -j MARK 
--set-mark 1
iptables -t mangle -A PREROUTING -p tcp -m opendpi --rtp -j MARK --set-mark 1

iptables -t mangle -A PREROUTING -p udp -m mark --mark 1 -j CONNMARK --save-mark
iptables -t mangle -A PREROUTING -p tcp -m mark --mark 1 -j CONNMARK --save-mark

iptables -t mangle -A POSTROUTING -o ppp+ -m mark --mark 1 -j CLASSIFY 
--set-class 1:10

There is huge amount of kernel warrning "xt_opendpi: ignoring untracked sk_buff"

What version of the product are you using? On what operating system?
opendpi-1.2.0
opendpi-netfilter-wrapper-1.1 with opendpi-netfilter-wrapper-1.1_2.6.35_v2.patch
Linux 2.6.37 SMP i686 Intel(R) Xeon(TM) CPU 3.06GHz GenuineIntel
iptables v1.4.2

Original issue reported on code.google.com by [email protected] on 27 Jan 2011 at 10:29