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>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c506241f863706426e76d66736d0258eda34d769..4e78e3f26798378bad69630679565b1909bfb370 100644 (file)
--- 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;
        }