1 files changed, 33 insertions, 3 deletions

diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 6d9f48bd374a..a7ea2d431714 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -84,7 +84,7 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
 	int i, err = 0;
 	int idx = 0, s_idx = cb->args[1];
 
-	if (br->multicast_disabled)
+	if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
 		return 0;
 
 	mdb = rcu_dereference(br->mdb);
@@ -162,6 +162,29 @@ out:
 	return err;
 }
 
+static int br_mdb_valid_dump_req(const struct nlmsghdr *nlh,
+				 struct netlink_ext_ack *extack)
+{
+	struct br_port_msg *bpm;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid header for mdb dump request");
+		return -EINVAL;
+	}
+
+	bpm = nlmsg_data(nlh);
+	if (bpm->ifindex) {
+		NL_SET_ERR_MSG_MOD(extack, "Filtering by device index is not supported for mdb dump request");
+		return -EINVAL;
+	}
+	if (nlmsg_attrlen(nlh, sizeof(*bpm))) {
+		NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct net_device *dev;
@@ -169,6 +192,13 @@ static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
 	struct nlmsghdr *nlh = NULL;
 	int idx = 0, s_idx;
 
+	if (cb->strict_check) {
+		int err = br_mdb_valid_dump_req(cb->nlh, cb->extack);
+
+		if (err < 0)
+			return err;
+	}
+
 	s_idx = cb->args[0];
 
 	rcu_read_lock();
@@ -598,7 +628,7 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br,
 	struct net_bridge_port *p;
 	int ret;
 
-	if (!netif_running(br->dev) || br->multicast_disabled)
+	if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
 		return -EINVAL;
 
 	dev = __dev_get_by_index(net, entry->ifindex);
@@ -673,7 +703,7 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
 	struct br_ip ip;
 	int err = -EINVAL;
 
-	if (!netif_running(br->dev) || br->multicast_disabled)
+	if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
 		return -EINVAL;
 
 	__mdb_entry_to_br_ip(entry, &ip);