nl80211: don't assume wdev->netdev exists

There are a few places that iterate the wdev
list and assume wdev->netdev exists, check
there. The rfkill one has to be extended for
each non-netdev type later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/net/wireless/core.c b/net/wireless/core.c
index b110a8a242db..2781a411cecc 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -177,6 +177,8 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
                 return -EOPNOTSUPP;
 
         list_for_each_entry(wdev, &rdev->wdev_list, list) {
+                if (!wdev->netdev)
+                        continue;
                 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
                 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
                 if (err)
@@ -190,6 +192,8 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 
                 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
                                                      list) {
+                        if (!wdev->netdev)
+                                continue;
                         wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
                         err = dev_change_net_namespace(wdev->netdev, net,
                                                         "wlan%d");
@@ -227,7 +231,8 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked)
         mutex_lock(&rdev->devlist_mtx);
 
         list_for_each_entry(wdev, &rdev->wdev_list, list)
-                dev_close(wdev->netdev);
+                if (wdev->netdev)
+                        dev_close(wdev->netdev);
 
         mutex_unlock(&rdev->devlist_mtx);
         rtnl_unlock();