udp: fix for unicast RX path optimization

Commits 5051ebd275de672b807c28d93002c2fb0514a3c9 and
5051ebd275de672b807c28d93002c2fb0514a3c9 ("ipv[46]: udp: optimize unicast RX
path") broke some programs.

	After upgrading a L2TP server to 2.6.33 it started to fail, tunnels going up an
down, after the 10th tunnel came up. My modified rp-l2tp uses a global
unconnected socket bound to (INADDR_ANY, 1701) and one connected socket per
tunnel after parameter negotiation.

	After ten sockets were open and due to mixed parameters to
udp[46]_lib_lookup2() kernel started to drop packets.

Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 7af756d0f93174416a341d4fb1717adbda9b6794..24272c4cfbcaaad2935d98ddca73841ef50fb72f 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -471,8 +471,8 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
                        if (hslot->count < hslot2->count)
                                goto begin;
 
-                       result = udp4_lib_lookup2(net, INADDR_ANY, sport,
-                                                 daddr, hnum, dif,
+                       result = udp4_lib_lookup2(net, saddr, sport,
+                                                 INADDR_ANY, hnum, dif,
                                                  hslot2, slot2);
                }
                rcu_read_unlock();

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3c0c9c755c928f74b84b6cfb72332c96c8fbf53d..787e480cc09638f0dfc04cc61f44576727c40395 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -258,8 +258,8 @@ static struct sock *__udp6_lib_lookup(struct net *net,
                        if (hslot->count < hslot2->count)
                                goto begin;
 
-                       result = udp6_lib_lookup2(net, &in6addr_any, sport,
-                                                 daddr, hnum, dif,
+                       result = udp6_lib_lookup2(net, saddr, sport,
+                                                 &in6addr_any, hnum, dif,
                                                  hslot2, slot2);
                }
                rcu_read_unlock();