tag	line	file	source code
fatal	77	include/linux/icmp.h	unsigned  fatal:1;
fatal	237	net/inet/tcp.c	if (icmp_err_convert[err & 0xff].fatal) {
fatal	130	net/inet/udp.c	if (icmp_err_convert[err & 0xff].fatal && sk->state == TCP_ESTABLISHED) {