From 0c4856250814d5fe1222a39c6954c4b5d79a829c Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 12 Jan 2025 00:09:44 +0100
Subject: [PATCH] hurd: Cope with signals sent to ourself early

Typically when aborting during initialization, before signals are set
up.
---
 sysdeps/mach/hurd/kill.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sysdeps/mach/hurd/kill.c b/sysdeps/mach/hurd/kill.c
index 1e006ee1db..8cba3cc4ea 100644
--- a/sysdeps/mach/hurd/kill.c
+++ b/sysdeps/mach/hurd/kill.c
@@ -17,7 +17,9 @@
 
 #include <errno.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <signal.h>
+#include <unistd.h>
 #include <hurd.h>
 #include <hurd/port.h>
 #include <hurd/signal.h>
@@ -34,6 +36,14 @@ __kill (pid_t pid, int sig)
   mach_port_t proc;
   struct hurd_userlink ulink;
 
+  if (pid == __getpid () && _hurd_msgport == MACH_PORT_NULL)
+    {
+      /* We are trying to kill ourself but we have not even initialized our own
+         msgport yet.  Abort by hand.  */
+      _exit (127);
+      /* NOTREACHED */
+    }
+
   void kill_pid (pid_t pid) /* Kill one PID.  */
     {
       /* SIGKILL is not delivered as a normal signal.