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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Felix Fietkau <nbd@nbd.name>,
        Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH 4.4 06/27] mac80211: fix setting IEEE80211_KEY_FLAG_RX_MGMT for AP mode keys
Date:   Thu, 11 Oct 2018 17:34:53 +0200
Message-Id: <20181011152534.315780314@linuxfoundation.org>
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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Felix Fietkau <nbd@nbd.name>

commit 211710ca74adf790b46ab3867fcce8047b573cd1 upstream.

key->sta is only valid after ieee80211_key_link, which is called later
in this function. Because of that, the IEEE80211_KEY_FLAG_RX_MGMT is
never set when management frame protection is enabled.

Fixes: e548c49e6dc6b ("mac80211: add key flag for management keys")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/mac80211/cfg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -219,7 +219,7 @@ static int ieee80211_add_key(struct wiph
 	case NL80211_IFTYPE_AP:
 	case NL80211_IFTYPE_AP_VLAN:
 		/* Keys without a station are used for TX only */
-		if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
+		if (sta && test_sta_flag(sta, WLAN_STA_MFP))
 			key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 		break;
 	case NL80211_IFTYPE_ADHOC: