case TCP_STATE_FIN_WAIT_2:
if (vnet_buffer (b0)->tcp.data_len)
error0 = tcp_segment_rcv (wrk, tc0, b0);
+ /* Don't accept out of order fins lower */
+ if (vnet_buffer (b0)->tcp.seq_end != tc0->rcv_nxt)
+ goto drop;
break;
case TCP_STATE_CLOSE_WAIT:
case TCP_STATE_CLOSING: