ipt_SYNPROXY: kernel panic with nullpointer dereference at dst_ifdown()

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Hi,

when activating ipt_SYNPROXY with:
iptables -t raw -A PREROUTING -p tcp -d 1.2.3.4 --dport 80 --tcp-flags
SYN,ACK,RST,FIN SYN -j SYNPROXY

and sending a SYN packet to port 80:
hping3 -S -d 64 1.2.3.4 -p 80

I get kernel panic:
http://goo.gl/L6dCz6

I'm using kernel v3.12.2 and iptables v1.4.21. Am I doing something wrong,
or is it a bug?

thank you for help beforehand :)

greetings,
nicki


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