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-rw-r--r--net/bridge/br_if.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index d9156eabddb8..9a36592cf20f 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -485,7 +485,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
struct net_bridge_port *p;
int err = 0;
unsigned br_hr, dev_hr;
- bool changed_addr;
+ bool changed_addr, fdb_synced = false;
/* Don't allow bridging non-ethernet like devices, or DSA-enabled
* master network devices since the bridge layer rx_handler prevents
@@ -555,6 +555,19 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
list_add_rcu(&p->list, &br->port_list);
nbp_update_port_count(br);
+ if (!br_promisc_port(p) && (p->dev->priv_flags & IFF_UNICAST_FLT)) {
+ /* When updating the port count we also update all ports'
+ * promiscuous mode.
+ * A port leaving promiscuous mode normally gets the bridge's
+ * fdb synced to the unicast filter (if supported), however,
+ * `br_port_clear_promisc` does not distinguish between
+ * non-promiscuous ports and *new* ports, so we need to
+ * sync explicitly here.
+ */
+ fdb_synced = br_fdb_sync_static(br, p) == 0;
+ if (!fdb_synced)
+ netdev_err(dev, "failed to sync bridge static fdb addresses to this port\n");
+ }
netdev_update_features(br->dev);
@@ -595,6 +608,8 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
return 0;
err7:
+ if (fdb_synced)
+ br_fdb_unsync_static(br, p);
list_del_rcu(&p->list);
br_fdb_delete_by_port(br, p, 0, 1);
nbp_update_port_count(br);