From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 26 Apr 2016 11:47:08 +0000 (+0200)
Subject: mac80211: fix statistics leak if dev_alloc_name() fails
X-Git-Tag: firefly_0821_release~176^2~4^2~46^2~48
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fe9295e05bf878652e8d0e5caef53516d8de1789;p=firefly-linux-kernel-4.4.55.git

mac80211: fix statistics leak if dev_alloc_name() fails

commit e6436be21e77e3659b4ff7e357ab5a8342d132d2 upstream.

In the case that dev_alloc_name() fails, e.g. because the name was
given by the user and already exists, we need to clean up properly
and free the per-CPU statistics. Fix that.

Fixes: 5a490510ba5f ("mac80211: use per-CPU TX/RX statistics")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 7a2b7915093b..bcb0a1b64556 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1750,7 +1750,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 
 		ret = dev_alloc_name(ndev, ndev->name);
 		if (ret < 0) {
-			free_netdev(ndev);
+			ieee80211_if_free(ndev);
 			return ret;
 		}
 
@@ -1836,7 +1836,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 
 		ret = register_netdevice(ndev);
 		if (ret) {
-			free_netdev(ndev);
+			ieee80211_if_free(ndev);
 			return ret;
 		}
 	}