[tkreuzer] 67140: [RTL] Improve RtlImageNtHeaderEx: - Fix signed/unsigned mismatch when comparing NT header offset - Simplify overflow checks - Add missing overflow-into-systemspace check CR-77 / C...
10 Apr
2015
10 Apr
'15
7:21 p.m.
Author: tkreuzer
Date: Fri Apr 10 19:21:22 2015
New Revision: 67140
URL: http://svn.reactos.org/svn/reactos?rev=67140&view=rev
Log:
[RTL]
Improve RtlImageNtHeaderEx:
- Fix signed/unsigned mismatch when comparing NT header offset
- Simplify overflow checks
- Add missing overflow-into-systemspace check
CR-77 / CORE-8091 #resolve
Modified:
trunk/reactos/boot/freeldr/freeldr/lib/rtl/libsupp.c
trunk/reactos/dll/ntdll/rtl/libsupp.c
trunk/reactos/include/ndk/amd64/mmtypes.h
trunk/reactos/include/ndk/i386/mmtypes.h
trunk/reactos/lib/rtl/image.c
trunk/reactos/lib/rtl/rtlp.h
trunk/reactos/ntoskrnl/include/internal/amd64/mm.h
trunk/reactos/ntoskrnl/mm/ARM3/miarm.h
Modified: trunk/reactos/boot/freeldr/freeldr/lib/rtl/libsupp.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/lib/r…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/lib/rtl/libsupp.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/lib/rtl/libsupp.c [iso-8859-1] Fri Apr 10 19:21:22
2015
@@ -19,6 +19,8 @@
*/
#include <freeldr.h>
+
+PVOID MmHighestUserAddress = (PVOID)MI_HIGHEST_USER_ADDRESS;
#if DBG
VOID FASTCALL
Modified: trunk/reactos/dll/ntdll/rtl/libsupp.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/ntdll/rtl/libsupp.c?re…
==============================================================================
--- trunk/reactos/dll/ntdll/rtl/libsupp.c [iso-8859-1] (original)
+++ trunk/reactos/dll/ntdll/rtl/libsupp.c [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -16,6 +16,7 @@
SIZE_T RtlpAllocDeallocQueryBufferSize = PAGE_SIZE;
PTEB LdrpTopLevelDllBeingLoadedTeb = NULL;
+PVOID MmHighestUserAddress = (PVOID)MI_HIGHEST_USER_ADDRESS;
/* FUNCTIONS ***************************************************************/
Modified: trunk/reactos/include/ndk/amd64/mmtypes.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/ndk/amd64/mmtypes.…
==============================================================================
--- trunk/reactos/include/ndk/amd64/mmtypes.h [iso-8859-1] (original)
+++ trunk/reactos/include/ndk/amd64/mmtypes.h [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -36,6 +36,11 @@
#define MM_ALLOCATION_GRANULARITY 0x10000
#define MM_ALLOCATION_GRANULARITY_SHIFT 16L
#define MM_PAGE_FRAME_NUMBER_SIZE 52
+
+//
+// User space range limit
+//
+#define MI_HIGHEST_USER_ADDRESS (PVOID)0x000007FFFFFEFFFFULL
//
// Address of the shared user page
Modified: trunk/reactos/include/ndk/i386/mmtypes.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/ndk/i386/mmtypes.h…
==============================================================================
--- trunk/reactos/include/ndk/i386/mmtypes.h [iso-8859-1] (original)
+++ trunk/reactos/include/ndk/i386/mmtypes.h [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -35,6 +35,11 @@
#define MM_ALLOCATION_GRANULARITY 0x10000
#define MM_ALLOCATION_GRANULARITY_SHIFT 16L
#define MM_PAGE_FRAME_NUMBER_SIZE 20
+
+//
+// User space range limit
+//
+#define MI_HIGHEST_USER_ADDRESS (PVOID)0x7FFEFFFF
//
// Address of the shared user page
Modified: trunk/reactos/lib/rtl/image.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/image.c?rev=67140&…
==============================================================================
--- trunk/reactos/lib/rtl/image.c [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/image.c [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -137,32 +137,42 @@
*/
NTSTATUS
NTAPI
-RtlImageNtHeaderEx(IN ULONG Flags,
- IN PVOID Base,
- IN ULONG64 Size,
- OUT PIMAGE_NT_HEADERS *OutHeaders)
+RtlImageNtHeaderEx(
+ _In_ ULONG Flags,
+ _In_ PVOID Base,
+ _In_ ULONG64 Size,
+ _Out_ PIMAGE_NT_HEADERS *OutHeaders)
{
PIMAGE_NT_HEADERS NtHeaders;
PIMAGE_DOS_HEADER DosHeader;
BOOLEAN WantsRangeCheck;
+ ULONG NtHeaderOffset;
/* You must want NT Headers, no? */
- if (!OutHeaders) return STATUS_INVALID_PARAMETER;
+ if (OutHeaders == NULL)
+ {
+ DPRINT1("OutHeaders is NULL\n");
+ return STATUS_INVALID_PARAMETER;
+ }
/* Assume failure */
*OutHeaders = NULL;
/* Validate Flags */
- if (Flags &~ RTL_IMAGE_NT_HEADER_EX_FLAG_NO_RANGE_CHECK)
- {
- DPRINT1("Invalid flag combination... check for new API flags?\n");
+ if (Flags & ~RTL_IMAGE_NT_HEADER_EX_FLAG_NO_RANGE_CHECK)
+ {
+ DPRINT1("Invalid flags: 0x%lx\n", Flags);
return STATUS_INVALID_PARAMETER;
}
/* Validate base */
- if (!(Base) || (Base == (PVOID)-1)) return STATUS_INVALID_PARAMETER;
-
- /* Check if the caller wants validation */
+ if ((Base == NULL) || (Base == (PVOID)-1))
+ {
+ DPRINT1("Invalid base address: %p\n", Base);
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* Check if the caller wants range checks */
WantsRangeCheck = !(Flags & RTL_IMAGE_NT_HEADER_EX_FLAG_NO_RANGE_CHECK);
if (WantsRangeCheck)
{
@@ -179,56 +189,56 @@
if (DosHeader->e_magic != IMAGE_DOS_SIGNATURE)
{
/* Not a valid COFF */
- DPRINT1("Not an MZ file\n");
+ DPRINT1("Invalid image DOS signature!\n");
+ return STATUS_INVALID_IMAGE_FORMAT;
+ }
+
+ /* Get the offset to the NT headers (and copy from LONG to ULONG) */
+ NtHeaderOffset = DosHeader->e_lfanew;
+
+ /* The offset must not be larger than 256MB, as a hard-coded check.
+ In Windows this check is only done in user mode, not in kernel mode,
+ but it shouldn't harm to have it anyway. Note that without this check,
+ other overflow checks would become necessary! */
+ if (NtHeaderOffset >= (256 * 1024 * 1024))
+ {
+ /* Fail */
+ DPRINT1("NT headers offset is larger than 256MB!\n");
return STATUS_INVALID_IMAGE_FORMAT;
}
/* Check if the caller wants validation */
if (WantsRangeCheck)
{
- /* The offset should fit in the passsed-in size */
- if (DosHeader->e_lfanew >= Size)
+ /* Make sure the file header fits into the size */
+ if ((NtHeaderOffset +
+ RTL_SIZEOF_THROUGH_FIELD(IMAGE_NT_HEADERS, FileHeader)) >= Size)
{
/* Fail */
- DPRINT1("e_lfanew is larger than PE file\n");
+ DPRINT1("NT headers beyond image size!\n");
return STATUS_INVALID_IMAGE_FORMAT;
}
-
- /* It shouldn't be past 4GB either */
- if (DosHeader->e_lfanew >=
- (MAXULONG - sizeof(IMAGE_DOS_SIGNATURE) - sizeof(IMAGE_FILE_HEADER)))
- {
- /* Fail */
- DPRINT1("e_lfanew is larger than 4GB\n");
+ }
+
+ /* Now get a pointer to the NT Headers */
+ NtHeaders = (PIMAGE_NT_HEADERS)((ULONG_PTR)Base + NtHeaderOffset);
+
+ /* Check if the mapping is in user space */
+ if (Base <= MmHighestUserAddress)
+ {
+ /* Make sure we don't overflow into kernel space */
+ if ((PVOID)(NtHeaders + 1) > MmHighestUserAddress)
+ {
+ DPRINT1("Image overflows from user space into kernel space!\n");
return STATUS_INVALID_IMAGE_FORMAT;
}
-
- /* And the whole file shouldn't overflow past 4GB */
- if ((DosHeader->e_lfanew +
- sizeof(IMAGE_DOS_SIGNATURE) - sizeof(IMAGE_FILE_HEADER)) >= Size)
- {
- /* Fail */
- DPRINT1("PE is larger than 4GB\n");
- return STATUS_INVALID_IMAGE_FORMAT;
- }
- }
-
- /* The offset also can't be larger than 256MB, as a hard-coded check */
- if (DosHeader->e_lfanew >= (256 * 1024 * 1024))
- {
- /* Fail */
- DPRINT1("PE offset is larger than 256MB\n");
- return STATUS_INVALID_IMAGE_FORMAT;
- }
-
- /* Now it's safe to get the NT Headers */
- NtHeaders = (PIMAGE_NT_HEADERS)((ULONG_PTR)Base + DosHeader->e_lfanew);
+ }
/* Verify the PE Signature */
if (NtHeaders->Signature != IMAGE_NT_SIGNATURE)
{
/* Fail */
- DPRINT1("PE signature missing\n");
+ DPRINT1("Invalid image NT signature!\n");
return STATUS_INVALID_IMAGE_FORMAT;
}
@@ -245,6 +255,10 @@
RtlImageNtHeader(IN PVOID Base)
{
PIMAGE_NT_HEADERS NtHeader;
+
+ ULONG c = 1;
+ ULONG s = FIELD_OFFSET(IMAGE_OPTIONAL_HEADER32, DataDirectory[c]);
+ (void)s;
/* Call the new API */
RtlImageNtHeaderEx(RTL_IMAGE_NT_HEADER_EX_FLAG_NO_RANGE_CHECK,
Modified: trunk/reactos/lib/rtl/rtlp.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/rtlp.h?rev=67140&a…
==============================================================================
--- trunk/reactos/lib/rtl/rtlp.h [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/rtlp.h [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -34,6 +34,8 @@
#define RVA(m, b) ((PVOID)((ULONG_PTR)(b) + (ULONG_PTR)(m)))
+extern PVOID MmHighestUserAddress;
+
NTSTATUS
NTAPI
RtlpSafeCopyMemory(
Modified: trunk/reactos/ntoskrnl/include/internal/amd64/mm.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/amd64/mm.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/amd64/mm.h [iso-8859-1] Fri Apr 10 19:21:22
2015
@@ -5,7 +5,6 @@
/* Memory layout base addresses */
#define MI_LOWEST_VAD_ADDRESS (PVOID)0x000000007FF00000ULL
-#define MI_HIGHEST_USER_ADDRESS (PVOID)0x000007FFFFFEFFFFULL
#define MI_USER_PROBE_ADDRESS (PVOID)0x000007FFFFFF0000ULL
#define MI_DEFAULT_SYSTEM_RANGE_START (PVOID)0xFFFF080000000000ULL
#define MI_REAL_SYSTEM_RANGE_START 0xFFFF800000000000ULL
Modified: trunk/reactos/ntoskrnl/mm/ARM3/miarm.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/miarm.h?r…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/miarm.h [iso-8859-1] Fri Apr 10 19:21:22 2015
@@ -29,7 +29,6 @@
#define MI_SYSTEM_VIEW_SIZE (32 * _1MB)
-#define MI_HIGHEST_USER_ADDRESS (PVOID)0x7FFEFFFF
#define MI_USER_PROBE_ADDRESS (PVOID)0x7FFF0000
#define MI_DEFAULT_SYSTEM_RANGE_START (PVOID)0x80000000
#define MI_SYSTEM_CACHE_WS_START (PVOID)0xC0C00000
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