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[PATCH 3.10] mac80211: fix AP-mode frame matching

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

In AP mode, ignore frames with mis-matched BSSID that aren't
multicast or sent to the correct destination. This fixes
reporting public action frames to userspace multiple times
on multiple virtual AP interfaces.

Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Jouni Malinen <j@xxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 net/mac80211/rx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 6e2c8c5..3194172 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3050,6 +3050,9 @@ static int prepare_for_handlers(struct ieee80211_rx_data *rx,
 			 * and location updates. Note that mac80211
 			 * itself never looks at these frames.
 			 */
+			if (!multicast &&
+			    !ether_addr_equal(sdata->vif.addr, hdr->addr1))
+				return 0;
 			if (ieee80211_is_public_action(hdr, skb->len))
 				return 1;
 			if (!ieee80211_is_beacon(hdr->frame_control))
-- 
1.8.0

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