diff --git a/kernel/fork.c b/kernel/fork.c
index 947a8dbce06a..dbe26ac6ca10 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2845,7 +2845,8 @@ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
 		.stack		= newsp,
 		.tls		= tls,
 	};
-
+	if (!valid_signal(args.exit_signal))
+		return -EINVAL;
 	return kernel_clone(&args);
 }
 #endif