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Added patch to initialize irp.Tail.Overlay.OriginalFileObject with stub file object.

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This commit is contained in:
Sebastian Lackner
2014-11-10 23:51:34 +01:00
parent f5cb09e9a4
commit 78784bf5d3
4 changed files with 71 additions and 0 deletions
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51
patches/ntoskrnl-Stub_FileObject/0001-ntoskrnl-Initialize-irp.Tail.Overlay.OriginalFileObj.patch Normal file
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@@ -0,0 +1,51 @@
From b8a93a6c879b8bd2d49cb43755cf8180d5372525 Mon Sep 17 00:00:00 2001
From: Sebastian Lackner <sebastian@fds-team.de>
Date: Mon, 10 Nov 2014 23:48:14 +0100
Subject: ntoskrnl: Initialize irp.Tail.Overlay.OriginalFileObject with stub
file object.
---
dlls/ntoskrnl.exe/ntoskrnl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 1d87110..aee68b3 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -142,6 +142,7 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
IRP irp;
MDL mdl;
IO_STACK_LOCATION irpsp;
+ FILE_OBJECT file;
PDRIVER_DISPATCH dispatch = device->DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL];
NTSTATUS status;
LARGE_INTEGER count;
@@ -152,6 +153,7 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
memset( &irp, 0x55, sizeof(irp) );
memset( &irpsp, 0x66, sizeof(irpsp) );
memset( &mdl, 0x77, sizeof(mdl) );
+ memset( &file, 0x88, sizeof(file) );
irp.RequestorMode = UserMode;
if ((code & 3) == METHOD_BUFFERED)
@@ -166,6 +168,7 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
irp.UserBuffer = out_buff;
irp.MdlAddress = &mdl;
irp.Tail.Overlay.s.u2.CurrentStackLocation = &irpsp;
+ irp.Tail.Overlay.OriginalFileObject = &file;
irp.UserIosb = NULL;
irpsp.MajorFunction = IRP_MJ_DEVICE_CONTROL;
@@ -182,6 +185,9 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
mdl.ByteCount = *out_size;
mdl.ByteOffset = 0;
+ file.FsContext = NULL;
+ file.FsContext2 = NULL;
+
device->CurrentIrp = &irp;
KeQueryTickCount( &count ); /* update the global KeTickCount */
--
2.1.3

3
patches/ntoskrnl-Stub_FileObject/definition Normal file
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@@ -0,0 +1,3 @@
Author: Sebastian Lackner
Subject: Initialize irp.Tail.Overlay.OriginalFileObject with stub file object.
Revision: 1