> [ 23.465616] ------------[ cut here ]------------ > [ 23.466477] WARNING: CPU: 0 PID: 1225 at net/netfilter/nf_conntrack_seqadj.c:232 > nf_ct_seq_offset+0x7a/0x9a > [ 23.468458] Missing nfct_seqadj_ext_add() setup call > It should be that nf_ct_add_synproxy failed and the seqadj extentision is not added.

When nf_ct_add_synproxy fails, the init_conntrack fails too and return ERR_PTR(-ENOMEM). In this case, the packet should be dropped directly, and should not be processed by the latter codes.