mac80211: Don't destroy auth data in case of anti-clogging

SAE AP may reject authentication with WLAN_STATUS_ANTI_CLOG_REQUIRED.
As the user space will immediately continue the authentication flow,
there is no need to destroy the authentication data in this case.
This saves unneeded station removal and releasing the channel.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200326150855.7483996157a8.I8040a842874aaf6d209df3fc8a2acb97a0bf508b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index b777879957234be2c7b25a667c15945b797d12ae..56d61bc9954dc49da5f90c0927c8a5fee17be249 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2948,10 +2948,15 @@ static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
        }
 
        if (status_code != WLAN_STATUS_SUCCESS) {
+               cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
+
+               if (auth_alg == WLAN_AUTH_SAE &&
+                   status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED)
+                       return;
+
                sdata_info(sdata, "%pM denied authentication (status %d)\n",
                           mgmt->sa, status_code);
                ieee80211_destroy_auth_data(sdata, false);
-               cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
                event.u.mlme.status = MLME_DENIED;
                event.u.mlme.reason = status_code;
                drv_event_callback(sdata->local, sdata, &event);