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>

1 files changed, 3 insertions, 1 deletions

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;
 }