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authorFelix Fietkau <nbd@openwrt.org>2010-01-08 18:15:13 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-01-12 14:02:08 -0500
commit3f0e0b220f80075ce15483b20458192c0ac27426 (patch)
tree3e443253f6f96b71b1ee2013cdef5b0d930efb0a
parent0e5ded5a87c097760abd68521b86f1025dedc7d7 (diff)
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>
-rw-r--r--net/mac80211/tx.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 0661e696a1d..47ca59e52e7 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -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);