diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 385437e..2e27176 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -248,7 +248,9 @@
 
 static void nlm4svc_callback_release(void *data)
 {
+	lock_kernel();
 	nlm_release_call(data);
+	unlock_kernel();
 }
 
 static const struct rpc_call_ops nlm4svc_callback_ops = {