From 7082a1f0c4f344ffd91fabf229cf3378fe1c0478 Mon Sep 17 00:00:00 2001
From: Liav A <liavalb@gmail.com>
Date: Sat, 19 Aug 2023 12:01:42 +0300
Subject: [PATCH] Kernel: Reject all syscalls during the shutdown procedure

---
 Kernel/Syscalls/SyscallHandler.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Kernel/Syscalls/SyscallHandler.cpp b/Kernel/Syscalls/SyscallHandler.cpp
index ceb925633f5..a8f28a740d6 100644
--- a/Kernel/Syscalls/SyscallHandler.cpp
+++ b/Kernel/Syscalls/SyscallHandler.cpp
@@ -18,6 +18,8 @@
 
 namespace Kernel {
 
+extern bool g_in_system_shutdown;
+
 namespace Syscall {
 
 using Handler = auto (Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> ErrorOr<FlatPtr>;
@@ -43,6 +45,9 @@ ErrorOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, Fla
 
     PerformanceManager::add_syscall_event(*current_thread, regs);
 
+    if (g_in_system_shutdown)
+        return ENOSYS;
+
     if (function >= Function::__Count) {
         dbgln("Unknown syscall {} requested ({:p}, {:p}, {:p}, {:p})", function, arg1, arg2, arg3, arg4);
         return ENOSYS;