cfg80211: fix leaks of wdev->conn->ie

This only occurs in the following error situations:
 - driver calls connect_result with failure
 - error scheduling authentication on connect
 - error initiating scan (to get BSSID and channel) on
   connect
 - userspace calls disconnect while in the SCANNING or
   SCAN_AGAIN states
Signed-off-by: NDavid Kilroy <kilroyd@googlemail.com>
Reviewed-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/wireless/sme.c

@@ -395,6 +395,8 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 
 	if (status != WLAN_STATUS_SUCCESS) {
 		wdev->sme_state = CFG80211_SME_IDLE;
+		if (wdev->conn)
+			kfree(wdev->conn->ie);
 		kfree(wdev->conn);
 		wdev->conn = NULL;
 		kfree(wdev->connect_keys);
@@ -779,6 +781,7 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 			}
 		}
 		if (err) {
+			kfree(wdev->conn->ie);
 			kfree(wdev->conn);
 			wdev->conn = NULL;
 			wdev->sme_state = CFG80211_SME_IDLE;
@@ -848,6 +851,7 @@ int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 		    (wdev->conn->state == CFG80211_CONN_SCANNING ||
 		     wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 			wdev->sme_state = CFG80211_SME_IDLE;
+			kfree(wdev->conn->ie);
 			kfree(wdev->conn);
 			wdev->conn = NULL;
 			wdev->ssid_len = 0;