mac80211: 802.11w - Drop unprotected robust management frames if MFP is used

Use ieee80211_drop_unencrypted() to decide whether a received frame
should be dropped with management frames, too. If MFP is negotiated,
unprotected robust management frames will be dropped.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 63db89aef3e4..57ce697e3251 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1737,6 +1737,9 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
         if (!(rx->flags & IEEE80211_RX_RA_MATCH))
                 return RX_DROP_MONITOR;
 
+        if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
+                return RX_DROP_MONITOR;
+
         /* all categories we currently handle have action_code */
         if (len < IEEE80211_MIN_ACTION_SIZE + 1)
                 return RX_DROP_MONITOR;
@@ -1825,10 +1828,14 @@ static ieee80211_rx_result debug_noinline
 ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
 {
         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
+        struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
 
         if (!(rx->flags & IEEE80211_RX_RA_MATCH))
                 return RX_DROP_MONITOR;
 
+        if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
+                return RX_DROP_MONITOR;
+
         if (ieee80211_vif_is_mesh(&sdata->vif))
                 return ieee80211_mesh_rx_mgmt(sdata, rx->skb, rx->status);