[edk2-devel] [Patch V4 11/21] UefiCpuPkg/CpuPageTableLib:Modify RandomTest to check Mask/Attr
duntan
dun.tan at intel.com
Thu Mar 23 07:40:47 UTC 2023
Modify RandomTest to check invalid input. When creating new page
table or updating exsiting page table:
1.If set [LinearAddress, LinearAddress+Length] to non-preset, all
other attributes should not be provided.
2.If [LinearAddress, LinearAddress+Length] contain non-present range,
the Returnstatus of PageTableMap() should be InvalidParameter when:
2.1Some of attributes are not provided when mapping non-present range
to present.
2.2Set any other attribute without setting the non-present range to
Present.
Signed-off-by: Dun Tan <dun.tan at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Rahul Kumar <rahul1.kumar at intel.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Zhiguang Liu <zhiguang.liu at intel.com>
---
UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------
UefiCpuPkg/Library/CpuPageTableLib/UnitTest/TestHelper.c | 6 +++++-
2 files changed, 131 insertions(+), 25 deletions(-)
diff --git a/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c b/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c
index 52eb9daa10..b99e31f4c8 100644
--- a/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c
+++ b/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c
@@ -273,6 +273,27 @@ ValidateAndRandomeModifyPageTable (
return Status;
}
+/**
+ Remove the last MAP_ENTRY in MapEntrys.
+
+ @param MapEntrys Pointer to MapEntrys buffer
+**/
+VOID
+RemoveLastMapEntry (
+ IN OUT MAP_ENTRYS *MapEntrys
+ )
+{
+ UINTN MapsIndex;
+
+ if (MapEntrys->Count == 0) {
+ return;
+ }
+
+ MapsIndex = MapEntrys->Count - 1;
+ ZeroMem (&(MapEntrys->Maps[MapsIndex]), sizeof (MAP_ENTRY));
+ MapEntrys->Count = MapsIndex;
+}
+
/**
Generate single random map entry.
The map entry can be the input of function PageTableMap
@@ -327,7 +348,16 @@ GenerateSingleRandomMapEntry (
MapEntrys->Maps[MapsIndex].Mask.Uint64 = MapEntrys->Maps[Random32 (0, (UINT32)MapsIndex-1)].Mask.Uint64;
} else {
MapEntrys->Maps[MapsIndex].Attribute.Uint64 = Random64 (0, MAX_UINT64) & mSupportedBit.Uint64;
- MapEntrys->Maps[MapsIndex].Mask.Uint64 = Random64 (0, MAX_UINT64) & mSupportedBit.Uint64;
+ if (RandomBoolean (5)) {
+ //
+ // The probability to get random Mask should be small since all bits of a random number
+ // have a high probability of containing 0, which may be a invalid input.
+ //
+ MapEntrys->Maps[MapsIndex].Mask.Uint64 = Random64 (0, MAX_UINT64) & mSupportedBit.Uint64;
+ } else {
+ MapEntrys->Maps[MapsIndex].Mask.Uint64 = MAX_UINT64;
+ }
+
if (MapEntrys->Maps[MapsIndex].Mask.Bits.ProtectionKey != 0) {
MapEntrys->Maps[MapsIndex].Mask.Bits.ProtectionKey = 0xF;
}
@@ -337,15 +367,7 @@ GenerateSingleRandomMapEntry (
MapEntrys->Maps[MapsIndex].Attribute.Bits.PageTableBaseAddress = MapEntrys->Maps[MapsIndex].LinearAddress >> 12;
MapEntrys->Maps[MapsIndex].Mask.Bits.PageTableBaseAddress = 0xFFFFFFFFFF;
} else {
- //
- // Todo: If the mask bit for base address is zero, when dump the pagetable, every entry mapping to physical address zeor.
- // This means the map count will be a large number, and impossible to finish in proper time.
- // Need to avoid such case when remove the Random option ONLY_ONE_ONE_MAPPING
- //
MapEntrys->Maps[MapsIndex].Attribute.Bits.PageTableBaseAddress = (Random64 (0, (((UINT64)1)<<52) - 1) & AlignedTable[Random32 (0, ARRAY_SIZE (AlignedTable) -1)])>> 12;
- if (RandomBoolean (50)) {
- MapEntrys->Maps[MapsIndex].Mask.Bits.PageTableBaseAddress = 0;
- }
}
MapEntrys->Count += 1;
@@ -608,23 +630,62 @@ SingleMapEntryTest (
IN UINTN InitMapCount
)
{
- UINTN MapsIndex;
- RETURN_STATUS Status;
- UINTN PageTableBufferSize;
- VOID *Buffer;
- IA32_MAP_ENTRY *Map;
- UINTN MapCount;
- UINTN Index;
- UINTN KeyPointCount;
- UINTN NewKeyPointCount;
- UINT64 *KeyPointBuffer;
- UINTN Level;
- UINT64 Value;
- UNIT_TEST_STATUS TestStatus;
-
- MapsIndex = MapEntrys->Count;
+ UINTN MapsIndex;
+ RETURN_STATUS Status;
+ UINTN PageTableBufferSize;
+ VOID *Buffer;
+ IA32_MAP_ENTRY *Map;
+ UINTN MapCount;
+ UINTN Index;
+ UINTN KeyPointCount;
+ UINTN NewKeyPointCount;
+ UINT64 *KeyPointBuffer;
+ UINTN Level;
+ UINT64 Value;
+ UNIT_TEST_STATUS TestStatus;
+ IA32_MAP_ATTRIBUTE *Mask;
+ IA32_MAP_ATTRIBUTE *Attribute;
+ UINT64 PreviousAddress;
+ UINT64 RangeLimit;
+ BOOLEAN IsNotPresent;
+
+ MapsIndex = MapEntrys->Count;
+ MapCount = 0;
+ PreviousAddress = 0;
+ IsNotPresent = FALSE;
GenerateSingleRandomMapEntry (MaxAddress, MapEntrys);
+ RangeLimit = MapEntrys->Maps[MapsIndex].LinearAddress + MapEntrys->Maps[MapsIndex].Length;
+ Status = PageTableParse (*PageTable, PagingMode, NULL, &MapCount);
+
+ if (MapCount != 0) {
+ UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
+ Map = AllocatePages (EFI_SIZE_TO_PAGES (MapCount * sizeof (IA32_MAP_ENTRY)));
+ ASSERT (Map != NULL);
+ Status = PageTableParse (*PageTable, PagingMode, Map, &MapCount);
+ }
+
+ //
+ // Check if the generated MapEntrys->Maps[MapsIndex] contains not-present range.
+ //
+ if (MapEntrys->Maps[MapsIndex].Length > 0) {
+ for (Index = 0; Index < MapCount; Index++) {
+ if ((PreviousAddress < Map[Index].LinearAddress) &&
+ (MapEntrys->Maps[MapsIndex].LinearAddress < Map[Index].LinearAddress) && (RangeLimit > PreviousAddress))
+ {
+ //
+ // MapEntrys->Maps[MapsIndex] contains not-present range in exsiting page table.
+ //
+ break;
+ }
+
+ PreviousAddress = Map[Index].LinearAddress + Map[Index].Length;
+ }
+
+ if (PreviousAddress < RangeLimit) {
+ IsNotPresent = TRUE;
+ }
+ }
PageTableBufferSize = 0;
Status = PageTableMap (
@@ -637,6 +698,47 @@ SingleMapEntryTest (
&MapEntrys->Maps[MapsIndex].Attribute,
&MapEntrys->Maps[MapsIndex].Mask
);
+
+ Attribute = &MapEntrys->Maps[MapsIndex].Attribute;
+ Mask = &MapEntrys->Maps[MapsIndex].Mask;
+ //
+ // If set [LinearAddress, LinearAddress+Attribute] to not preset, all
+ // other attributes should not be provided.
+ //
+ if ((MapEntrys->Maps[MapsIndex].Length > 0) && (Attribute->Bits.Present == 0) && (Mask->Bits.Present == 1) && (Mask->Uint64 > 1)) {
+ RemoveLastMapEntry (MapEntrys);
+ UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
+ return UNIT_TEST_PASSED;
+ }
+
+ //
+ // Return Status for non-present range also should be InvalidParameter when:
+ // 1. Some of attributes are not provided when mapping non-present range to present.
+ // 2. Set any other attribute without setting the non-present range to Present.
+ //
+ if (IsNotPresent) {
+ if ((Mask->Bits.Present == 1) && (Attribute->Bits.Present == 1)) {
+ //
+ // Creating new page table or remapping non-present range to present.
+ //
+ if ((Mask->Bits.ReadWrite == 0) || (Mask->Bits.UserSupervisor == 0) || (Mask->Bits.WriteThrough == 0) || (Mask->Bits.CacheDisabled == 0) ||
+ (Mask->Bits.Accessed == 0) || (Mask->Bits.Dirty == 0) || (Mask->Bits.Pat == 0) || (Mask->Bits.Global == 0) ||
+ (Mask->Bits.PageTableBaseAddress == 0) || (Mask->Bits.ProtectionKey == 0) || (Mask->Bits.Nx == 0))
+ {
+ RemoveLastMapEntry (MapEntrys);
+ UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
+ return UNIT_TEST_PASSED;
+ }
+ } else if ((Mask->Bits.Present == 0) && (Mask->Uint64 > 1)) {
+ //
+ // Only change other attributes for non-present range is not permitted.
+ //
+ RemoveLastMapEntry (MapEntrys);
+ UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
+ return UNIT_TEST_PASSED;
+ }
+ }
+
if (PageTableBufferSize != 0) {
UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
diff --git a/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/TestHelper.c b/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/TestHelper.c
index 5bd70c0f65..10fdee2f94 100644
--- a/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/TestHelper.c
+++ b/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/TestHelper.c
@@ -1,7 +1,7 @@
/** @file
helper file for Unit tests of the CpuPageTableLib instance of the CpuPageTableLib class
- Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -171,6 +171,10 @@ IsPageTableValid (
UNIT_TEST_STATUS Status;
IA32_PAGING_ENTRY *PagingEntry;
+ if (PageTable == 0) {
+ return UNIT_TEST_PASSED;
+ }
+
if ((PagingMode == Paging32bit) || (PagingMode == PagingPae) || (PagingMode >= PagingModeMax)) {
//
// 32bit paging is never supported.
--
2.31.1.windows.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#101639): https://edk2.groups.io/g/devel/message/101639
Mute This Topic: https://groups.io/mt/97796388/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-
More information about the edk2-devel-archive
mailing list