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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>
hifive-unleashed-5.1
Felix Fietkau 2010-01-08 18:15:13 +01:00 committed by John W. Linville
parent 0e5ded5a87
commit 3f0e0b220f
1 changed files with 4 additions and 1 deletions
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5
net/mac80211/tx.c
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@ -1056,8 +1056,11 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
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);