fix remove func

Anti-Cheat_Driver/comm_win7.cpp

@@ -3,8 +3,7 @@
 #include "utils.h"
 #include "kernel_function.h"
 
-#pragma warning(disable : 4309)
-#pragma warning(disable : 4838)
+#pragma warning(disable : 4309 4838)
 
 PFILE_OBJECT file_obj{ 0 };
 PDEVICE_OBJECT device_obj{ 0 };
@@ -39,6 +38,8 @@ namespace comm_win7
 		return status;
 	};
 
+	uintptr_t beep_trampoline = NULL;
+
 	auto comm_install_hook() -> BOOL
 	{
 		auto drv_obj = device_obj->DriverObject;
@@ -47,7 +48,7 @@ namespace comm_win7
 
 		orign_maj_function = drv_obj->MajorFunction[IRP_MJ_DEVICE_CONTROL];
 
-		auto beep_trampoline = utils::get_beep_trampoline_ptr();
+		beep_trampoline = utils::get_beep_trampoline_ptr();
 		if (!beep_trampoline)
 			return FALSE;
 
@@ -73,6 +74,15 @@ namespace comm_win7
 		{
 			drv_obj->MajorFunction[IRP_MJ_DEVICE_CONTROL] = 
 				(PDRIVER_DISPATCH)orign_maj_function;
+
+			if (!beep_trampoline)
+				return FALSE;
+
+			char nullcode[12]{ 0 };
+			auto status = kernel_function::MmMDLPagesCopy((PVOID)beep_trampoline, &nullcode, sizeof(nullcode), 0x0000002, KernelMode);
+			if (!NT_SUCCESS(status))
+				return FALSE;
+
 		}
 
 		return TRUE;