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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2017-04-26 10:58:51 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-24 10:58:44 +0100
commitc7e0dd289af18cf8ca2bfdee28ba781eb80ae5a4 (patch)
treea2b01d78f90a31bbce0012d7e9f4829b75c3503a
parent266bbc907c3fc1336460e4748a07de4292bbac8f (diff)
downloadlinux-linaro-stable-c7e0dd289af18cf8ca2bfdee28ba781eb80ae5a4.tar.gz
mac80211: don't parse encrypted management frames in ieee80211_frame_acked
[ Upstream commit cf147085fdda044622973a12e4e06f1c753ab677 ] ieee80211_frame_acked is called when a frame is acked by the peer. In case this is a management frame, we check if this an SMPS frame, in which case we can update our antenna configuration. When we parse the management frame we look at the category in case it is an action frame. That byte sits after the IV in case the frame was encrypted. This means that if the frame was encrypted, we basically look at the IV instead of looking at the category. It is then theorically possible that we think that an SMPS action frame was acked where really we had another frame that was encrypted. Since the only management frame whose ack needs to be tracked is the SMPS action frame, and that frame is not a robust management frame, it will never be encrypted. The easiest way to fix this problem is then to not look at frames that were encrypted. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/mac80211/status.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 5bad05e9af90..45fb1abdb265 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -194,6 +194,7 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
}
if (ieee80211_is_action(mgmt->frame_control) &&
+ !ieee80211_has_protected(mgmt->frame_control) &&
mgmt->u.action.category == WLAN_CATEGORY_HT &&
mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
ieee80211_sdata_running(sdata)) {