mac80211: fix ie memory allocation for scheduled scans

We were not allocating memory for the IEs passed in the scheduled_scan
request and this was causing memory corruption (buffer overflow).

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/scan.c

@@ -877,7 +877,8 @@ int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
 	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
 		local->sched_scan_ies.ie[i] = kzalloc(2 +
 						      IEEE80211_MAX_SSID_LEN +
-						      local->scan_ies_len,
+						      local->scan_ies_len +
+						      req->ie_len,
 						      GFP_KERNEL);
 		if (!local->sched_scan_ies.ie[i]) {
 			ret = -ENOMEM;