From: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
We need to avoid forwarding to ports in MCAST_INCLUDE filter mode when the
mdst entry is a *,G or when the port has the blocked flag.
Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
---
net/bridge/br_forward.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 4d12999e4576..e28ffadd1371 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -274,10 +274,19 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *prev = NULL;
struct net_bridge_port_group *p;
+ bool allow_mode_include = true;
struct hlist_node *rp;
rp = rcu_dereference(hlist_first_rcu(&br->router_list));
- p = mdst ? rcu_dereference(mdst->ports) : NULL;
+ if (mdst) {
+ p = rcu_dereference(mdst->ports);
+ if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
+ br_multicast_is_star_g(&mdst->addr))
+ allow_mode_include = false;
+ } else {
+ p = NULL;
+ }
+
while (p || rp) {
struct net_bridge_port *port, *lport, *rport;
@@ -292,6 +301,10 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
local_orig);
goto delivered;
}
+ if ((!allow_mode_include &&
+ p->filter_mode == MCAST_INCLUDE) ||
+ (p->flags & MDB_PG_FLAGS_BLOCKED))
+ goto delivered;
} else {
port = rport;
}
--
2.25.4
