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--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1051,8 +1051,11 @@ ieee80211_tx_prepare(struct ieee80211_su
hdr = (struct ieee80211_hdr *) skb->data;
- if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
tx->sta = rcu_dereference(sdata->u.vlan.sta);
+ if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
+ return TX_DROP;
+ }
if (!tx->sta)
tx->sta = sta_info_get(sdata, hdr->addr1);
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