From a9bd4b97f0e48a252c17cec4902ea577b08ce35e Mon Sep 17 00:00:00 2001
From: avos <avos@FreeBSD.org>
Date: Thu, 19 May 2016 22:02:03 +0000
Subject: net80211: restore interface state check for IEEE80211_IOC_SCAN_REQ
 ioctl.

Do not try to start a scan when interface is not running.

How-to-reproduce:
1) ifconfig wlan0 create wlandev urtwn0
2) wlandebug -i wlan0 state
3) ifconfig wlan0 scan
---
 sys/net80211/ieee80211_ioctl.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'sys/net80211')

diff --git a/sys/net80211/ieee80211_ioctl.c b/sys/net80211/ieee80211_ioctl.c
index 3d93278..b65f23a 100644
--- a/sys/net80211/ieee80211_ioctl.c
+++ b/sys/net80211/ieee80211_ioctl.c
@@ -2486,6 +2486,11 @@ ieee80211_scanreq(struct ieee80211vap *vap, struct ieee80211_scan_req *sr)
 	 * Otherwise just invoke the scan machinery directly.
 	 */
 	IEEE80211_LOCK(ic);
+	if (ic->ic_nrunning == 0) {
+		IEEE80211_UNLOCK(ic);
+		return ENXIO;
+	}
+
 	if (vap->iv_state == IEEE80211_S_INIT) {
 		/* NB: clobbers previous settings */
 		vap->iv_scanreq_flags = sr->sr_flags;
-- 
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