package/mac80211/patches/560-4addr_vlan_check.patch

   1 --- a/net/mac80211/tx.c
   2 +++ b/net/mac80211/tx.c
   3 @@ -1051,8 +1051,11 @@ ieee80211_tx_prepare(struct ieee80211_su
   4
   5         hdr = (struct ieee80211_hdr *) skb->data;
   6
   7 -       if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
   8 +       if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
   9                 tx->sta = rcu_dereference(sdata->u.vlan.sta);
  10 +               if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
  11 +                       return TX_DROP;
  12 +       }
  13         if (!tx->sta)
  14                 tx->sta = sta_info_get(sdata, hdr->addr1);
  15