UBUNTU: SAUCE: apparmor: fix reference count leak when securityfs_setup_d_inode() fails

BugLink: http://bugs.launchpad.net/bugs/1660845Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

security/apparmor/apparmorfs.c

@@ -1052,12 +1052,12 @@ static int ns_mkdir_op(struct inode *dir, struct dentry *dentry, umode_t mode)
 	error = securityfs_pin_fs();
 	inode_lock_nested(dir, I_MUTEX_PARENT);
 	if (error)
-		return error;
+		goto out;
 
 	error = __securityfs_setup_d_inode(dir, dentry, mode | S_IFDIR,  NULL,
 					   NULL, NULL);
 	if (error)
-		return error;
+		goto out;
 
 	ns = aa_create_ns(parent, ACCESS_ONCE(dentry->d_name.name), dentry);
 	if (IS_ERR(ns)) {
@@ -1066,6 +1066,7 @@ static int ns_mkdir_op(struct inode *dir, struct dentry *dentry, umode_t mode)
 	}
 
 	aa_put_ns(ns);		/* list ref remains */
+out:
 	aa_put_ns(parent);
 
 	return error;