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Subject[patch 06/83] udp: multicast packets need to check namespace
2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Eric Dumazet <dada1@cosmosbay.com>

[ Upstream commit 920a46115ca3fa88990276d98520abab85495b2d ]

Current UDP multicast delivery is not namespace aware.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
net/ipv4/udp.c | 12 +++++++-----
net/ipv6/udp.c | 8 ++++----
2 files changed, 11 insertions(+), 9 deletions(-)

--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -302,7 +302,7 @@ static struct sock *__udp4_lib_lookup(st
return result;
}

-static inline struct sock *udp_v4_mcast_next(struct sock *sk,
+static inline struct sock *udp_v4_mcast_next(struct net *net, struct sock *sk,
__be16 loc_port, __be32 loc_addr,
__be16 rmt_port, __be32 rmt_addr,
int dif)
@@ -314,7 +314,8 @@ static inline struct sock *udp_v4_mcast_
sk_for_each_from(s, node) {
struct inet_sock *inet = inet_sk(s);

- if (s->sk_hash != hnum ||
+ if (!net_eq(sock_net(s), net) ||
+ s->sk_hash != hnum ||
(inet->daddr && inet->daddr != rmt_addr) ||
(inet->dport != rmt_port && inet->dport) ||
(inet->rcv_saddr && inet->rcv_saddr != loc_addr) ||
@@ -1097,15 +1098,16 @@ static int __udp4_lib_mcast_deliver(stru
read_lock(&udp_hash_lock);
sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]);
dif = skb->dev->ifindex;
- sk = udp_v4_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
+ sk = udp_v4_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
if (sk) {
struct sock *sknext = NULL;

do {
struct sk_buff *skb1 = skb;

- sknext = udp_v4_mcast_next(sk_next(sk), uh->dest, daddr,
- uh->source, saddr, dif);
+ sknext = udp_v4_mcast_next(net, sk_next(sk), uh->dest,
+ daddr, uh->source, saddr,
+ dif);
if (sknext)
skb1 = skb_clone(skb, GFP_ATOMIC);

--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -313,7 +313,7 @@ drop:
return -1;
}

-static struct sock *udp_v6_mcast_next(struct sock *sk,
+static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk,
__be16 loc_port, struct in6_addr *loc_addr,
__be16 rmt_port, struct in6_addr *rmt_addr,
int dif)
@@ -325,7 +325,7 @@ static struct sock *udp_v6_mcast_next(st
sk_for_each_from(s, node) {
struct inet_sock *inet = inet_sk(s);

- if (sock_net(s) != sock_net(sk))
+ if (!net_eq(sock_net(s), net))
continue;

if (s->sk_hash == num && s->sk_family == PF_INET6) {
@@ -368,14 +368,14 @@ static int __udp6_lib_mcast_deliver(stru
read_lock(&udp_hash_lock);
sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]);
dif = inet6_iif(skb);
- sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
+ sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
if (!sk) {
kfree_skb(skb);
goto out;
}

sk2 = sk;
- while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
+ while ((sk2 = udp_v6_mcast_next(net, sk_next(sk2), uh->dest, daddr,
uh->source, saddr, dif))) {
struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
if (buff) {


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