From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 11 Nov 2009 16:23:31 +0000 (+0100)
Subject: nl80211: only allow adding stations to running vlan interfaces
X-Git-Tag: firefly_0821_release~9833^2~3968^2~280^2~13
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c258d2de972d1e391a3dec731e0801ed1cc85494;p=firefly-linux-kernel-4.4.55.git

nl80211: only allow adding stations to running vlan interfaces

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5c8b3bfada4b..37264d56bace 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1821,7 +1821,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
 }
 
 /*
- * Get vlan interface making sure it is on the right wiphy.
+ * Get vlan interface making sure it is running and on the right wiphy.
  */
 static int get_vlan(struct genl_info *info,
 		    struct cfg80211_registered_device *rdev,
@@ -1839,6 +1839,8 @@ static int get_vlan(struct genl_info *info,
 			return -EINVAL;
 		if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
 			return -EINVAL;
+		if (!netif_running(*vlan))
+			return -ENETDOWN;
 	}
 	return 0;
 }