From 10ae66b1024db238899ccce1f790620ab5c92aa9 Mon Sep 17 00:00:00 2001
From: Sergio Lopez <slp@redhat.com>
Date: Thu, 2 Mar 2023 07:34:49 +0100
Subject: [PATCH 01/30] krunfw: Don't panic when init dies

In libkrun, the isolated process runs as PID 1. When it exits,
trigger an orderly reboot instead of panic'ing.

Also, silence reboot messages for the moment. Eventually we should
play with the printk levels instead.

Signed-off-by: Sergio Lopez <slp@redhat.com>
---
diff --git a/kernel/exit.c b/kernel/exit.c
index e38b2bb85..eea19980a 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -69,6 +69,7 @@
 #include <linux/sysfs.h>
 #include <linux/user_events.h>
 #include <linux/unwind_deferred.h>
+#include <linux/reboot.h>
 #include <linux/uaccess.h>
 #include <linux/pidfs.h>
 
@@ -938,8 +939,12 @@ void __noreturn do_exit(long code)
 		 * immediately to get a useable coredump.
 		 */
 		if (unlikely(is_global_init(tsk)))
+#ifdef VERBOSE_LIBKRUN
 			panic("Attempted to kill init! exitcode=0x%08x\n",
 				tsk->signal->group_exit_code ?: (int)code);
+#else
+            orderly_reboot();
+#endif
 
 #ifdef CONFIG_POSIX_TIMERS
 		hrtimer_cancel(&tsk->signal->real_timer);
diff --git a/kernel/reboot.c b/kernel/reboot.c
index 61924a056..823722234 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -291,10 +291,12 @@ void kernel_restart(char *cmd)
 	do_kernel_restart_prepare();
 	migrate_to_reboot_cpu();
 	syscore_shutdown();
+#ifdef VERBOSE_LIBKRUN
 	if (!cmd)
 		pr_emerg("Restarting system\n");
 	else
 		pr_emerg("Restarting system with command '%s'\n", cmd);
+#endif
 	kmsg_dump(KMSG_DUMP_SHUTDOWN);
 	machine_restart(cmd);
 }
-- 
2.43.0