cfg80211: fix a crash in dev lookup on dump commands

IS_ERR and PTR_ERR were called with the wrong pointer, leading to a
crash when cfg80211_get_dev_from_ifindex fails.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c506241f8637..4e78e3f26798 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -224,8 +224,8 @@ static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
         }
 
         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
-        if (IS_ERR(dev)) {
-                err = PTR_ERR(dev);
+        if (IS_ERR(*rdev)) {
+                err = PTR_ERR(*rdev);
                 goto out_rtnl;
         }