Hello all, I encountered an "nf_conntrack: table full" warning on Linux 6.15-rc4. Running cat /proc/net/nf_conntrack showed a large number of connections in the SYN_SENT state. As is well known, if we attempt to connect to a non-existent port, the system will respond with an RST and then delete the conntrack entry. However, when we frequently connect to non-existent ports, the conntrack entries are not deleted, eventually causing the nf_conntrack table to fill up. The problem can be reproduced using the following command: hping3 -S -V -p 9007 --flood xx.x.xxx.xxx ~$ cat /proc/net/nf_conntrack ipv4 2 tcp 6 112 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=2642 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=2642 mark=0 zone=0 use=2 ipv4 2 tcp 6 111 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=11510 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=11510 mark=0 zone=0 use=2 ipv4 2 tcp 6 111 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=28611 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=28611 mark=0 zone=0 use=2 ipv4 2 tcp 6 112 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=62849 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=62849 mark=0 zone=0 use=2 ipv4 2 tcp 6 111 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=3410 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=3410 mark=0 zone=0 use=2 ipv4 2 tcp 6 111 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=44185 dport=9007 [UNREPLIED] src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=44185 mark=0 zone=0 use=2 ipv4 2 tcp 6 111 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=51099 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=51099 mark=0 zone=0 use=2 ipv4 2 tcp 6 112 SYN_SENT src=xx.x.xxx.xxx dst=xx.xx.xx.xx sport=23609 dport=9007 src=xx.xx.xx.xx dst=xx.x.xxx.xxx sport=9007 dport=23609 mark=0 zone=0 use=2
