Commit 5cf3d46192fc (udp: Simplify__udp*_lib_mcast_deliver)
simplified the filter for incoming IPv6 multicast but removed
the check of the local socket address and the UDP destination
address.
This patch restores the filter to prevent sockets bound to a IPv6
multicast IP to receive other UDP traffic link unicast.
Signed-off-by: Henning Rogge hro...@gmail.com
Fixes: 5cf3d46192fc (udp: Simplify__udp*_lib_mcast_deliver)
Cc: David S. Miller da...@davemloft.net
---
The commit above was found by me with a git bisect. I think the
patch should be included into the stable kernel trees.
---
net/ipv6/udp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3477c919fcc8..c2ec41617a35 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -731,7 +731,9 @@ static bool __udp_v6_is_mcast_sock(struct net *net, struct
sock *sk,
(inet-inet_dport inet-inet_dport != rmt_port) ||
(!ipv6_addr_any(sk-sk_v6_daddr)
!ipv6_addr_equal(sk-sk_v6_daddr, rmt_addr)) ||
- (sk-sk_bound_dev_if sk-sk_bound_dev_if != dif))
+ (sk-sk_bound_dev_if sk-sk_bound_dev_if != dif) ||
+ (!ipv6_addr_any(sk-sk_v6_rcv_saddr)
+ !ipv6_addr_equal(sk-sk_v6_rcv_saddr, loc_addr)))
return false;
if (!inet6_mc_check(sk, loc_addr, rmt_addr))
return false;
--
2.1.0
--
To unsubscribe from this list: send the line unsubscribe netdev in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
