From cecf279c3234a405ae6bfe45194ca7c59eb10100 Mon Sep 17 00:00:00 2001 From: Dun Tan Date: Fri, 17 Mar 2023 15:06:48 +0800 Subject: UefiCpuPkg/CpuPageTableLib:Modify RandomTest to check Mask/Attr Modify RandomTest to check invalid input. When creating new page table or updating exsiting page table: 1.If set [LinearAddress, LinearAddress+Length] to non-present, 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 Cc: Eric Dong Reviewed-by: Ray Ni Cc: Rahul Kumar Tested-by: Gerd Hoffmann Acked-by: Gerd Hoffmann Cc: Zhiguang Liu --- .../Library/CpuPageTableLib/UnitTest/RandomTest.c | 153 +++++++++++++++++---- .../Library/CpuPageTableLib/UnitTest/TestHelper.c | 6 +- 2 files changed, 133 insertions(+), 26 deletions(-) (limited to 'UefiCpuPkg') diff --git a/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c b/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c index 612fddcee0..121cc4f2b2 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; @@ -608,25 +630,65 @@ 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; - MAP_ENTRY *LastMapEntry; - - 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; + MAP_ENTRY *LastMapEntry; + IA32_MAP_ATTRIBUTE *Mask; + IA32_MAP_ATTRIBUTE *Attribute; + UINT64 LastNotPresentRegionStart; + BOOLEAN IsNotPresent; + + MapsIndex = MapEntrys->Count; + MapCount = 0; + LastNotPresentRegionStart = 0; + IsNotPresent = FALSE; GenerateSingleRandomMapEntry (MaxAddress, MapEntrys); LastMapEntry = &MapEntrys->Maps[MapsIndex]; + 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 (LastMapEntry->Length > 0) { + for (Index = 0; Index < MapCount; Index++) { + if ((LastNotPresentRegionStart < Map[Index].LinearAddress) && + (LastMapEntry->LinearAddress < Map[Index].LinearAddress) && (LastMapEntry->LinearAddress + LastMapEntry->Length > LastNotPresentRegionStart)) + { + // + // MapEntrys->Maps[MapsIndex] contains not-present range in exsiting page table. + // + break; + } + + LastNotPresentRegionStart = Map[Index].LinearAddress + Map[Index].Length; + } + + // + // Either LastMapEntry overlaps with the not-present region in the very end + // Or it overlaps with one in the middle + if (LastNotPresentRegionStart < LastMapEntry->LinearAddress + LastMapEntry->Length) { + IsNotPresent = TRUE; + } + } PageTableBufferSize = 0; Status = PageTableMap ( @@ -639,6 +701,47 @@ SingleMapEntryTest ( &LastMapEntry->Attribute, &LastMapEntry->Mask ); + + Attribute = &LastMapEntry->Attribute; + Mask = &LastMapEntry->Mask; + // + // If set [LinearAddress, LinearAddress+Attribute] to not preset, all + // other attributes should not be provided. + // + if ((LastMapEntry->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.
+ Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.
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. -- cgit v1.2.3