bridge: Correctly encode addresses when dumping mdb entries

When dumping mdb table, set the addresses the kernel returns
based on the address protocol type.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_mdb.c

@@ -84,9 +84,11 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
 					struct br_mdb_entry e;
 					e.ifindex = port->dev->ifindex;
 					e.state = p->state;
-					e.addr.u.ip4 = p->addr.u.ip4;
+					if (p->addr.proto == htons(ETH_P_IP))
+						e.addr.u.ip4 = p->addr.u.ip4;
 #if IS_ENABLED(CONFIG_IPV6)
-					e.addr.u.ip6 = p->addr.u.ip6;
+					if (p->addr.proto == htons(ETH_P_IPV6))
+						e.addr.u.ip6 = p->addr.u.ip6;
 #endif
 					e.addr.proto = p->addr.proto;
 					if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) {