cfg80211: keep track of current_bss for userspace SME

When a userspace SME is active, we're currently not
keeping track of the BSS properly for reporting the
current link and for internal use. Additionally, it
looks like there is a possible BSS leak in that the
BSS never gets removed from auth_bsses[]. To fix it,
pass the BSS struct to __cfg80211_connect_result in
this case.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 18 insertions, 17 deletions

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index d2b5d4ce0a0..3728d2b88b2 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -182,7 +182,7 @@ void cfg80211_conn_work(struct work_struct *work)
 					wdev->conn->params.bssid,
 					NULL, 0, NULL, 0,
 					WLAN_STATUS_UNSPECIFIED_FAILURE,
-					false);
+					false, NULL);
 		wdev_unlock(wdev);
 	}
 
@@ -247,7 +247,7 @@ static void __cfg80211_sme_scan_done(struct net_device *dev)
 					wdev->conn->params.bssid,
 					NULL, 0, NULL, 0,
 					WLAN_STATUS_UNSPECIFIED_FAILURE,
-					false);
+					false, NULL);
 	}
 }
 
@@ -305,7 +305,7 @@ void cfg80211_sme_rx_auth(struct net_device *dev,
 		schedule_work(&rdev->conn_work);
 	} else if (status_code != WLAN_STATUS_SUCCESS) {
 		__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
-					  status_code, false);
+					  status_code, false, NULL);
 	} else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 		 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 		wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
@@ -316,10 +316,10 @@ void cfg80211_sme_rx_auth(struct net_device *dev,
 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 			       const u8 *req_ie, size_t req_ie_len,
 			       const u8 *resp_ie, size_t resp_ie_len,
-			       u16 status, bool wextev)
+			       u16 status, bool wextev,
+			       struct cfg80211_bss *bss)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
-	struct cfg80211_bss *bss;
 #ifdef CONFIG_WIRELESS_EXT
 	union iwreq_data wrqu;
 #endif
@@ -361,6 +361,12 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 	}
 #endif
 
+	if (wdev->current_bss) {
+		cfg80211_unhold_bss(wdev->current_bss);
+		cfg80211_put_bss(&wdev->current_bss->pub);
+		wdev->current_bss = NULL;
+	}
+
 	if (status == WLAN_STATUS_SUCCESS &&
 	    wdev->sme_state == CFG80211_SME_IDLE)
 		goto success;
@@ -368,12 +374,6 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 	if (wdev->sme_state != CFG80211_SME_CONNECTING)
 		return;
 
-	if (wdev->current_bss) {
-		cfg80211_unhold_bss(wdev->current_bss);
-		cfg80211_put_bss(&wdev->current_bss->pub);
-		wdev->current_bss = NULL;
-	}
-
 	if (wdev->conn)
 		wdev->conn->state = CFG80211_CONN_IDLE;
 
@@ -386,10 +386,12 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 		return;
 	}
 
-	bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
-			       wdev->ssid, wdev->ssid_len,
-			       WLAN_CAPABILITY_ESS,
-			       WLAN_CAPABILITY_ESS);
+ success:
+	if (!bss)
+		bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
+				       wdev->ssid, wdev->ssid_len,
+				       WLAN_CAPABILITY_ESS,
+				       WLAN_CAPABILITY_ESS);
 
 	if (WARN_ON(!bss))
 		return;
@@ -397,7 +399,6 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 	cfg80211_hold_bss(bss_from_pub(bss));
 	wdev->current_bss = bss_from_pub(bss);
 
- success:
 	wdev->sme_state = CFG80211_SME_CONNECTED;
 	cfg80211_upload_connect_keys(wdev);
 }
@@ -788,7 +789,7 @@ int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 	else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 		__cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 					  WLAN_STATUS_UNSPECIFIED_FAILURE,
-					  wextev);
+					  wextev, NULL);
 
 	return 0;
 }