From a6cef2408c9220bd1e8f0a30436f6d575eb98ebb Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sun, 12 Jan 2020 10:32:56 +0100
Subject: [PATCH] Kernel: Add sigreturn() to "stdio" with all the other signal
 syscalls

---
 Kernel/Process.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index f229549e91..1c986cd009 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -1196,6 +1196,7 @@ void create_kernel_info_page()
 
 int Process::sys$sigreturn(RegisterDump& registers)
 {
+    REQUIRE_PROMISE(stdio);
     SmapDisabler disabler;
 
     //Here, we restore the state pushed by dispatch signal and asm_signal_trampoline.