diff options
| -rw-r--r-- | net/bridge/br_fdb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index e0670d7054f9..7896cf143045 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -736,6 +736,12 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, struct net_bridge_fdb_entry *fdb; bool modified = false; + /* If the port cannot learn allow only local and static entries */ + if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && + !(source->state == BR_STATE_LEARNING || + source->state == BR_STATE_FORWARDING)) + return -EPERM; + fdb = fdb_find(head, addr, vid); if (fdb == NULL) { if (!(flags & NLM_F_CREATE)) |