mac80211: do not transmit frames on unconfigured 4-addr vlan interfaces
If frames are transmitted on 4-addr ap vlan interfaces with no station, they end up being transmitted unencrypted, even if the ap interface uses WPA. This patch add some sanity checking to make sure that this does not happen. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -1056,8 +1056,11 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
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hdr = (struct ieee80211_hdr *) skb->data;
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if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
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if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
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tx->sta = rcu_dereference(sdata->u.vlan.sta);
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if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
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return TX_DROP;
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}
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if (!tx->sta)
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tx->sta = sta_info_get(sdata, hdr->addr1);
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