NET: net_namespace, fix lock imbalance

register_pernet_gen_subsys omits mutex_unlock in one fail path.
Fix it.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 55cffad..55151fa 100644 (file)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -341,8 +341,8 @@ again:
        rv = register_pernet_operations(first_device, ops);
        if (rv < 0)
                ida_remove(&net_generic_ids, *id);
-       mutex_unlock(&net_mutex);
 out:
+       mutex_unlock(&net_mutex);
        return rv;
 }
 EXPORT_SYMBOL_GPL(register_pernet_gen_subsys);