linux-kernel - [PATCH 6.6 168/638] wifi: iwlwifi: mvm: report beacon protection failures

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Message-ID: <20240324230116.1348576-169-sashal@kernel.org>
Date: Sun, 24 Mar 2024 18:53:25 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Johannes Berg <johannes.berg@...el.com>,
	Andrei Otcheretianski <andrei.otcheretianski@...el.com>,
	Gregory Greenman <gregory.greenman@...el.com>,
	Miri Korenblit <miriam.rachel.korenblit@...el.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.6 168/638] wifi: iwlwifi: mvm: report beacon protection failures

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit 91380f768d7f6e3d003755defa792e9a00a1444a ]

Andrei reports that we just silently drop beacons after we
report the key counters, but never report to userspace, so
wpa_supplicant cannot send the WNM action frame. Fix that.

Fixes: b1fdc2505abc ("iwlwifi: mvm: advertise BIGTK client support if available")
Reported-by: Andrei Otcheretianski <andrei.otcheretianski@...el.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Reviewed-by: Gregory Greenman <gregory.greenman@...el.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@...el.com>
Link: https://msgid.link/20240128084842.7d855442cdce.Iba90b26f893dc8c49bfb8be65373cd0a138af12c@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 26 +++++++++++--------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 82b4d4d01097a..bac0228b8c866 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -282,6 +282,7 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 				u32 status,
 				struct ieee80211_rx_status *stats)
 {
+	struct wireless_dev *wdev;
 	struct iwl_mvm_sta *mvmsta;
 	struct iwl_mvm_vif *mvmvif;
 	u8 keyid;
@@ -303,9 +304,15 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 	if (!ieee80211_is_beacon(hdr->frame_control))
 		return 0;
 
+	if (!sta)
+		return -1;
+
+	mvmsta = iwl_mvm_sta_from_mac80211(sta);
+	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
+
 	/* key mismatch - will also report !MIC_OK but we shouldn't count it */
 	if (!(status & IWL_RX_MPDU_STATUS_KEY_VALID))
-		return -1;
+		goto report;
 
 	/* good cases */
 	if (likely(status & IWL_RX_MPDU_STATUS_MIC_OK &&
@@ -314,13 +321,6 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 		return 0;
 	}
 
-	if (!sta)
-		return -1;
-
-	mvmsta = iwl_mvm_sta_from_mac80211(sta);
-
-	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
-
 	/*
 	 * both keys will have the same cipher and MIC length, use
 	 * whichever one is available
@@ -329,11 +329,11 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 	if (!key) {
 		key = rcu_dereference(mvmvif->bcn_prot.keys[1]);
 		if (!key)
-			return -1;
+			goto report;
 	}
 
 	if (len < key->icv_len + IEEE80211_GMAC_PN_LEN + 2)
-		return -1;
+		goto report;
 
 	/* get the real key ID */
 	keyid = frame[len - key->icv_len - IEEE80211_GMAC_PN_LEN - 2];
@@ -347,7 +347,7 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 			return -1;
 		key = rcu_dereference(mvmvif->bcn_prot.keys[keyid - 6]);
 		if (!key)
-			return -1;
+			goto report;
 	}
 
 	/* Report status to mac80211 */
@@ -355,6 +355,10 @@ static int iwl_mvm_rx_mgmt_prot(struct ieee80211_sta *sta,
 		ieee80211_key_mic_failure(key);
 	else if (status & IWL_RX_MPDU_STATUS_REPLAY_ERROR)
 		ieee80211_key_replay(key);
+report:
+	wdev = ieee80211_vif_to_wdev(mvmsta->vif);
+	if (wdev->netdev)
+		cfg80211_rx_unprot_mlme_mgmt(wdev->netdev, (void *)hdr, len);
 
 	return -1;
 }
-- 
2.43.0