[PATCH 22/70] mac80211: fix AP-mode frame matching

From: Luis Henriques
Date: Tue Jun 04 2013 - 10:23:19 EST -stable review patch. If anyone has any objections, please let me know.


From: Johannes Berg <johannes.berg@xxxxxxxxx>

commit 2b9ccd4e4308272e5aec614b77c5385e7ec2ec90 upstream.

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.

Reported-by: Jouni Malinen <j@xxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
net/mac80211/rx.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 064384c..1914a65 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2861,6 +2861,9 @@ 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 (!(status->rx_flags & IEEE80211_RX_IN_SCAN) &&
ieee80211_is_public_action(hdr, skb->len))
return 1;

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