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 5c8b3bf..37264d5 100644 (file)
--- 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;
 }