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mac80211: Handle special status codes in SAE commit

Message ID 20200731183830.18735-1-jouni@codeaurora.org
State Accepted
Delegated to: Johannes Berg
Headers show
Series mac80211: Handle special status codes in SAE commit | expand

Commit Message

Jouni Malinen July 31, 2020, 6:38 p.m. UTC
SAE authentication has been extended with H2E (IEEE 802.11 REVmd) and PK
(WFA) options. Those extensions use special status code values in the
SAE commit messages (Authentication frame with transaction sequence
number 1) to identify which extension is in use. mac80211 was
interpreting those new values as the AP denying authentication and that
resulted in failure to complete SAE authentication in some cases.

Fix this by adding exceptions for the new status code values 126 and
127.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 include/linux/ieee80211.h | 2 ++
 net/mac80211/mlme.c       | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 9f732499ea88..c47f43e65a2f 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -2561,6 +2561,8 @@  enum ieee80211_statuscode {
 	/* 802.11ai */
 	WLAN_STATUS_FILS_AUTHENTICATION_FAILURE = 108,
 	WLAN_STATUS_UNKNOWN_AUTHENTICATION_SERVER = 109,
+	WLAN_STATUS_SAE_HASH_TO_ELEMENT = 126,
+	WLAN_STATUS_SAE_PK = 127,
 };
 
 
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 839d0367446c..8b7ca8ddfe20 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2988,7 +2988,10 @@  static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
 		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
 
 		if (auth_alg == WLAN_AUTH_SAE &&
-		    status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED)
+		    (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
+		     (auth_transaction == 1 &&
+		      (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
+		       status_code == WLAN_STATUS_SAE_PK))))
 			return;
 
 		sdata_info(sdata, "%pM denied authentication (status %d)\n",