[IPV6]: Fix per-socket multicast filtering in sk_reuse case

per-socket multicast filters were not being applied to all sockets
in the case of an exact-match bound address, due to an over-exuberant
"return" in the look-up code. Fix below. IPv4 does not have this problem.

Thanks to Hoerdt Mickael for reporting the bug.

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 69b146843a20..2b9bf9bd177f 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -405,9 +405,8 @@ static struct sock *udp_v6_mcast_next(struct sock *sk,
                                 continue;
 
                         if (!ipv6_addr_any(&np->rcv_saddr)) {
-                                if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
-                                        return s;
-                                continue;
+                                if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
+                                        continue;
                         }
                         if(!inet6_mc_check(s, loc_addr, rmt_addr))
                                 continue;