Control: tag -1 confirmed I don't have a MIPS environment to hand, but I do have a Stretch s390x VM, so on the assumption that this is an endianness bug, I tried to replicate it there -- successfully. I manually added and removed an ICMP flow with conntrack:
azazel@debian-s390x:~$ sudo conntrack -I --src 192.168.122.123 --dst 192.168.96.1 --protonum icmp --timeout 120 --icmp-type 8 --icmp-code 0 conntrack v1.4.4 (conntrack-tools): 1 flow entries have been created. azazel@debian-s390x:~$ sudo conntrack -D icmp 1 118 src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 [UNREPLIED] src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 mark=0 use=1 conntrack v1.4.4 (conntrack-tools): 1 flow entries have been deleted. and the test programme output the following: azazel@debian-s390x:~/tmp$ sudo ./ct_filter [UPDATE] icmp 1 120 src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 [UNREPLIED] src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 mark=0 [DESTROY] icmp 1 src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 [UNREPLIED] src=0.0.0.0 dst=0.0.0.0 type=0 code=0 id=0 By contrast, nothing was output when doing the same on an amd64 host. J.
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