IPv4: skip ICMP for bridge contrack users when defrag expires

users in [IP_DEFRAG_CONNTRACK_BRIDGE_IN, __IP_DEFRAG_CONNTRACK_BR_IN]
should not ICMP message also.
Reported-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NAndy Zhou <azhou@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ip_fragment.c

@@ -177,7 +177,9 @@ static bool frag_expire_skip_icmp(u32 user)
 {
 	return user == IP_DEFRAG_AF_PACKET ||
 	       ip_defrag_user_in_between(user, IP_DEFRAG_CONNTRACK_IN,
-					 __IP_DEFRAG_CONNTRACK_IN_END);
+					 __IP_DEFRAG_CONNTRACK_IN_END) ||
+	       ip_defrag_user_in_between(user, IP_DEFRAG_CONNTRACK_BRIDGE_IN,
+					 __IP_DEFRAG_CONNTRACK_BRIDGE_IN);
 }
 
 /*