diff options
Diffstat (limited to 'DuetPkg/PciBusNoEnumerationDxe')
| -rw-r--r-- | DuetPkg/PciBusNoEnumerationDxe/PciOptionRomSupport.c | 56 | ||||
| -rw-r--r-- | DuetPkg/PciBusNoEnumerationDxe/PciRomTable.c | 37 |
2 files changed, 68 insertions, 25 deletions
diff --git a/DuetPkg/PciBusNoEnumerationDxe/PciOptionRomSupport.c b/DuetPkg/PciBusNoEnumerationDxe/PciOptionRomSupport.c index f1af103995..28adb2bf2c 100644 --- a/DuetPkg/PciBusNoEnumerationDxe/PciOptionRomSupport.c +++ b/DuetPkg/PciBusNoEnumerationDxe/PciOptionRomSupport.c @@ -1,6 +1,6 @@ /*++
-Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -155,6 +155,7 @@ Returns: PCI_DATA_STRUCTURE *RomPcir;
UINT64 RomSize;
UINT64 RomImageSize;
+ UINT32 LegacyImageLength;
UINT8 *RomInMemory;
UINT8 CodeType;
@@ -207,6 +208,7 @@ Returns: RomBarOffset = RomBar;
retStatus = EFI_NOT_FOUND;
FirstCheck = TRUE;
+ LegacyImageLength = 0;
do {
PciDevice->PciRootBridgeIo->Mem.Read (
@@ -229,6 +231,15 @@ Returns: FirstCheck = FALSE;
OffsetPcir = RomHeader->PcirOffset;
+ //
+ // If the pointer to the PCI Data Structure is invalid, no further images can be located.
+ // The PCI Data Structure must be DWORD aligned.
+ //
+ if (OffsetPcir == 0 ||
+ (OffsetPcir & 3) != 0 ||
+ RomImageSize + OffsetPcir + sizeof (PCI_DATA_STRUCTURE) > RomSize) {
+ break;
+ }
PciDevice->PciRootBridgeIo->Mem.Read (
PciDevice->PciRootBridgeIo,
EfiPciWidthUint8,
@@ -236,8 +247,18 @@ Returns: sizeof (PCI_DATA_STRUCTURE),
(UINT8 *) RomPcir
);
+ //
+ // If a valid signature is not present in the PCI Data Structure, no further images can be located.
+ //
+ if (RomPcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
+ break;
+ }
+ if (RomImageSize + RomPcir->ImageLength * 512 > RomSize) {
+ break;
+ }
if (RomPcir->CodeType == PCI_CODE_TYPE_PCAT_IMAGE) {
CodeType = PCI_CODE_TYPE_PCAT_IMAGE;
+ LegacyImageLength = ((UINT32)((EFI_LEGACY_EXPANSION_ROM_HEADER *)RomHeader)->Size512) * 512;
}
Indicator = RomPcir->Indicator;
RomImageSize = RomImageSize + RomPcir->ImageLength * 512;
@@ -249,7 +270,7 @@ Returns: // of the legacy length and the PCIR Image Length
//
if (CodeType == PCI_CODE_TYPE_PCAT_IMAGE) {
- RomImageSize = MAX(RomImageSize, (((EFI_LEGACY_EXPANSION_ROM_HEADER *)RomHeader)->Size512 * 512));
+ RomImageSize = MAX (RomImageSize, LegacyImageLength);
}
if (RomImageSize > 0) {
@@ -399,7 +420,6 @@ Returns: EFI_HANDLE ImageHandle;
EFI_STATUS Status;
EFI_STATUS retStatus;
- BOOLEAN FirstCheck;
BOOLEAN SkipImage;
UINT32 DestinationSize;
UINT32 ScratchSize;
@@ -410,6 +430,7 @@ Returns: EFI_DECOMPRESS_PROTOCOL *Decompress;
EFI_PCI_EXPANSION_ROM_HEADER *EfiRomHeader;
PCI_DATA_STRUCTURE *Pcir;
+ UINT32 InitializationSize;
Indicator = 0;
@@ -419,35 +440,36 @@ Returns: RomBar = PciDevice->PciIo.RomImage;
RomBarOffset = (UINT8 *) RomBar;
retStatus = EFI_NOT_FOUND;
- FirstCheck = TRUE;
+
+ if (RomBarOffset == NULL) {
+ return retStatus;
+ }
+ ASSERT (((EFI_PCI_EXPANSION_ROM_HEADER *) RomBarOffset)->Signature == PCI_EXPANSION_ROM_HEADER_SIGNATURE);
do {
EfiRomHeader = (EFI_PCI_EXPANSION_ROM_HEADER *) RomBarOffset;
if (EfiRomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
RomBarOffset = RomBarOffset + 512;
- if (FirstCheck) {
- break;
- } else {
- continue;
- }
+ continue;
}
- FirstCheck = FALSE;
Pcir = (PCI_DATA_STRUCTURE *) (RomBarOffset + EfiRomHeader->PcirOffset);
+ ASSERT (Pcir->Signature == PCI_DATA_STRUCTURE_SIGNATURE);
ImageSize = (UINT32) (Pcir->ImageLength * 512);
Indicator = Pcir->Indicator;
- if ((Pcir->CodeType == PCI_CODE_TYPE_EFI_IMAGE) &&
- (EfiRomHeader->EfiSignature == EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE)) {
+ if ((Pcir->CodeType == PCI_CODE_TYPE_EFI_IMAGE) &&
+ (EfiRomHeader->EfiSignature == EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE) &&
+ ((EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
+ (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER))) {
- if ((EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
- (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER)) {
+ ImageOffset = EfiRomHeader->EfiImageHeaderOffset;
+ InitializationSize = EfiRomHeader->InitializationSize * 512;
- ImageOffset = EfiRomHeader->EfiImageHeaderOffset;
- ImageSize = (UINT32) (EfiRomHeader->InitializationSize * 512);
+ if (InitializationSize <= ImageSize && ImageOffset < InitializationSize) {
ImageBuffer = (VOID *) (RomBarOffset + ImageOffset);
- ImageLength = ImageSize - (UINT32)ImageOffset;
+ ImageLength = InitializationSize - (UINT32)ImageOffset;
DecompressedImageBuffer = NULL;
//
diff --git a/DuetPkg/PciBusNoEnumerationDxe/PciRomTable.c b/DuetPkg/PciBusNoEnumerationDxe/PciRomTable.c index ed868e2eaa..5085431b08 100644 --- a/DuetPkg/PciBusNoEnumerationDxe/PciRomTable.c +++ b/DuetPkg/PciBusNoEnumerationDxe/PciRomTable.c @@ -1,6 +1,6 @@ /*++
-Copyright (c) 2005 - 2007, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -133,6 +133,7 @@ Returns: VOID *DecompressedImageBuffer;
UINT32 ImageLength;
EFI_DECOMPRESS_PROTOCOL *Decompress;
+ UINT32 InitializationSize;
RomBar = (VOID *) (UINTN) PciOptionRomDescriptor->RomAddress;
RomSize = (UINTN) PciOptionRomDescriptor->RomLength;
@@ -151,24 +152,44 @@ Returns: EfiRomHeader = (EFI_PCI_EXPANSION_ROM_HEADER *) (UINTN) RomBarOffset;
- if (EfiRomHeader->Signature != 0xaa55) {
+
+ if (EfiRomHeader->Signature != PCI_EXPANSION_ROM_HEADER_SIGNATURE) {
return retStatus;
}
+ //
+ // If the pointer to the PCI Data Structure is invalid, no further images can be located.
+ // The PCI Data Structure must be DWORD aligned.
+ //
+ if (EfiRomHeader->PcirOffset == 0 ||
+ (EfiRomHeader->PcirOffset & 3) != 0 ||
+ RomBarOffset - (UINTN)RomBar + EfiRomHeader->PcirOffset + sizeof (PCI_DATA_STRUCTURE) > RomSize) {
+ break;
+ }
Pcir = (PCI_DATA_STRUCTURE *) (UINTN) (RomBarOffset + EfiRomHeader->PcirOffset);
+ //
+ // If a valid signature is not present in the PCI Data Structure, no further images can be located.
+ //
+ if (Pcir->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
+ break;
+ }
ImageSize = Pcir->ImageLength * 512;
+ if (RomBarOffset - (UINTN)RomBar + ImageSize > RomSize) {
+ break;
+ }
if ((Pcir->CodeType == PCI_CODE_TYPE_EFI_IMAGE) &&
- (EfiRomHeader->EfiSignature == EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE) ) {
+ (EfiRomHeader->EfiSignature == EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE) &&
+ ((EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
+ (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER))) {
- if ((EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
- (EfiRomHeader->EfiSubsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER) ) {
+ ImageOffset = EfiRomHeader->EfiImageHeaderOffset;
+ InitializationSize = EfiRomHeader->InitializationSize * 512;
- ImageOffset = EfiRomHeader->EfiImageHeaderOffset;
- ImageSize = EfiRomHeader->InitializationSize * 512;
+ if (InitializationSize <= ImageSize && ImageOffset < InitializationSize) {
ImageBuffer = (VOID *) (UINTN) (RomBarOffset + ImageOffset);
- ImageLength = ImageSize - ImageOffset;
+ ImageLength = InitializationSize - ImageOffset;
DecompressedImageBuffer = NULL;
//
|