From 5ce9382e982648fc961501d4a059789ab1f8c31c Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 19 Jan 2020 08:50:55 +0100
Subject: [PATCH] Kernel: Only require "stdio" pledge for sending signals to
 self

This should match what OpenBSD does. Sending a signal to yourself seems
basically harmless.
---
 Kernel/Process.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index 8ae036b394..f69bcf4b51 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -2128,7 +2128,11 @@ KResult Process::do_killpg(pid_t pgrp, int signal)
 
 int Process::sys$kill(pid_t pid, int signal)
 {
-    REQUIRE_PROMISE(proc);
+    if (pid == m_pid)
+        REQUIRE_PROMISE(stdio);
+    else
+        REQUIRE_PROMISE(proc);
+
     if (signal < 0 || signal >= 32)
         return -EINVAL;
     if (pid <= 0)