From: Arik Nemtsov <arik@wizery.com>
Date: Wed, 3 Dec 2014 16:08:17 +0000 (+0200)
Subject: cfg80211: correctly check ad-hoc channels
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=185076d6db7b0320fd7669732923179f9a4d068b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

cfg80211: correctly check ad-hoc channels

Ad-hoc requires beaconing for regulatory purposes. Validate that the
channel is valid for beaconing, and not only enabled.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index c9f5ad5d5d94..7b8309840d4e 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1546,12 +1546,18 @@ static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
 		if (!wdev->beacon_interval)
 			goto out;
 
+		ret = cfg80211_reg_can_beacon(wiphy,
+					      &wdev->chandef, wdev->iftype);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		if (!wdev->ssid_len)
+			goto out;
+
 		ret = cfg80211_reg_can_beacon(wiphy,
 					      &wdev->chandef, wdev->iftype);
 		break;
 	case NL80211_IFTYPE_STATION:
 	case NL80211_IFTYPE_P2P_CLIENT:
-	case NL80211_IFTYPE_ADHOC:
 		if (!wdev->current_bss ||
 		    !wdev->current_bss->pub.channel)
 			goto out;