From: Johannes Berg <johannes.berg@intel.com>
Date: Fri, 10 May 2013 17:23:40 +0000 (+0200)
Subject: cfg80211: fix wiphy_register error path
X-Git-Tag: v3.9.5~116
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c183f01b8c909323c42c77304f2fc4ad68cbd4a8;p=people%2Fms%2Flinux.git

cfg80211: fix wiphy_register error path

commit 03cd7e4e1ea16cd151c799a33b5ca1fd41a464df upstream.

If rfkill_register() fails in wiphy_register() the struct device
is unregistered but everything else isn't (regulatory, debugfs)
and we even leave the wiphy instance on all internal lists even
though it will likely be freed soon, which is clearly a problem.
Fix this by cleaning up properly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 6ddf74f0ae1e..ed56e2bc7ba8 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -638,17 +638,21 @@ int wiphy_register(struct wiphy *wiphy)
 	 * cfg80211_mutex lock
 	 */
 	res = rfkill_register(rdev->rfkill);
-	if (res)
-		goto out_rm_dev;
+	if (res) {
+		device_del(&rdev->wiphy.dev);
+
+		mutex_lock(&cfg80211_mutex);
+		debugfs_remove_recursive(rdev->wiphy.debugfsdir);
+		list_del_rcu(&rdev->list);
+		wiphy_regulatory_deregister(wiphy);
+		mutex_unlock(&cfg80211_mutex);
+		return res;
+	}
 
 	rtnl_lock();
 	rdev->wiphy.registered = true;
 	rtnl_unlock();
 	return 0;
-
-out_rm_dev:
-	device_del(&rdev->wiphy.dev);
-	return res;
 }
 EXPORT_SYMBOL(wiphy_register);