[edk2-devel] [RFC PATCH 1/1] MdeModulePkg/PiDxeS3BootScriptLib: Use SafeIntLib to avoid truncation
Philippe Mathieu-Daudé
philmd at redhat.com
Thu Feb 13 18:29:35 UTC 2020
Math expressions written in terms of SafeIntLib function calls
are easily readable, making review trivial. Convert the truncation
checks added by commit 322ac05f8 to SafeIntLib calls.
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Hao A Wu <hao.a.wu at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
Suggested-by: Laszlo Ersek <lersek at redhat.com>
Signed-off-by: Philippe Mathieu-Daude <philmd at redhat.com>
---
.../DxeS3BootScriptLib.inf | 1 +
.../InternalBootScriptLib.h | 1 +
.../PiDxeS3BootScriptLib/BootScriptSave.c | 114 +++++++++++-------
3 files changed, 73 insertions(+), 43 deletions(-)
diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf b/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
index 2b894c99da55..698039fe8e69 100644
--- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
+++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
@@ -40,15 +40,16 @@ [Packages]
[LibraryClasses]
UefiBootServicesTableLib
BaseLib
BaseMemoryLib
TimerLib
DebugLib
PcdLib
UefiLib
SmbusLib
PciSegmentLib
IoLib
LockBoxLib
+ SafeIntLib
[Protocols]
gEfiSmmBase2ProtocolGuid ## SOMETIMES_CONSUMES
diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/InternalBootScriptLib.h b/MdeModulePkg/Library/PiDxeS3BootScriptLib/InternalBootScriptLib.h
index 9485994087d0..7513220c15ac 100644
--- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/InternalBootScriptLib.h
+++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/InternalBootScriptLib.h
@@ -1,49 +1,50 @@
/** @file
Support for S3 boot script lib. This file defined some internal macro and internal
data structure
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __INTERNAL_BOOT_SCRIPT_LIB__
#define __INTERNAL_BOOT_SCRIPT_LIB__
#include <PiDxe.h>
#include <Guid/EventGroup.h>
#include <Protocol/SmmBase2.h>
#include <Protocol/DxeSmmReadyToLock.h>
#include <Protocol/SmmReadyToLock.h>
#include <Protocol/SmmExitBootServices.h>
#include <Protocol/SmmLegacyBoot.h>
#include <Library/S3BootScriptLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/PcdLib.h>
#include <Library/SmbusLib.h>
#include <Library/IoLib.h>
#include <Library/PciSegmentLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/TimerLib.h>
#include <Library/UefiLib.h>
#include <Library/LockBoxLib.h>
+#include <Library/SafeIntLib.h>
#include "BootScriptInternalFormat.h"
#define MAX_IO_ADDRESS 0xFFFF
//
// Macro to convert a UEFI PCI address + segment to a PCI Segment Library PCI address
//
#define PCI_ADDRESS_ENCODE(S, A) PCI_SEGMENT_LIB_ADDRESS( \
S, \
((((UINTN)(A)) & 0xff000000) >> 24), \
((((UINTN)(A)) & 0x00ff0000) >> 16), \
((((UINTN)(A)) & 0xff00) >> 8), \
((RShiftU64 ((A), 32) & 0xfff) | ((A) & 0xff)) \
)
diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
index 9315fc9f0188..d229263638fc 100644
--- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
+++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
@@ -995,55 +995,60 @@ EFIAPI
S3BootScriptSaveIoWrite (
IN S3_BOOT_SCRIPT_LIB_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
UINT8 WidthInByte;
EFI_BOOT_SCRIPT_IO_WRITE ScriptIoWrite;
- WidthInByte = (UINT8) (0x01 << (Width & 0x03));
+ Status = SafeUintnToUint8 (Count, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Mult (Length, 0x01 << (Width & 0x03), &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
- //
- // Truncation check
- //
- if ((Count > MAX_UINT8) ||
- (WidthInByte * Count > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_IO_WRITE))) {
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_IO_WRITE), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_IO_WRITE) + (WidthInByte * Count));
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// save script data
//
ScriptIoWrite.OpCode = EFI_BOOT_SCRIPT_IO_WRITE_OPCODE;
ScriptIoWrite.Length = Length;
ScriptIoWrite.Width = Width;
ScriptIoWrite.Address = Address;
ScriptIoWrite.Count = (UINT32) Count;
CopyMem ((VOID*)Script, (VOID*)&ScriptIoWrite, sizeof(EFI_BOOT_SCRIPT_IO_WRITE));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_IO_WRITE)), Buffer, WidthInByte * Count);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Adds a record for an I/O modify operation into a S3 boot script table
@param Width The width of the I/O operations.Enumerated in S3_BOOT_SCRIPT_LIB_WIDTH.
@param Address The base address of the I/O operations.
@param Data A pointer to the data to be OR-ed.
@param DataMask A pointer to the data mask to be AND-ed with the data read from the register
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN_SUCCESS Opcode is added.
**/
@@ -1100,54 +1105,59 @@ EFIAPI
S3BootScriptSaveMemWrite (
IN S3_BOOT_SCRIPT_LIB_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
UINT8 WidthInByte;
EFI_BOOT_SCRIPT_MEM_WRITE ScriptMemWrite;
- WidthInByte = (UINT8) (0x01 << (Width & 0x03));
+ Status = SafeUintnToUint8 (Count, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Mult (Length, 0x01 << (Width & 0x03), &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
- //
- // Truncation check
- //
- if ((Count > MAX_UINT8) ||
- (WidthInByte * Count > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_MEM_WRITE))) {
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_MEM_WRITE), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_MEM_WRITE) + (WidthInByte * Count));
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptMemWrite.OpCode = EFI_BOOT_SCRIPT_MEM_WRITE_OPCODE;
ScriptMemWrite.Length = Length;
ScriptMemWrite.Width = Width;
ScriptMemWrite.Address = Address;
ScriptMemWrite.Count = (UINT32) Count;
CopyMem ((VOID*)Script, (VOID*)&ScriptMemWrite, sizeof(EFI_BOOT_SCRIPT_MEM_WRITE));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_MEM_WRITE)), Buffer, WidthInByte * Count);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Adds a record for a memory modify operation into a specified boot script table.
@param Width The width of the I/O operations.Enumerated in S3_BOOT_SCRIPT_LIB_WIDTH.
@param Address The base address of the memory operations. Address needs alignment if required
@param Data A pointer to the data to be OR-ed.
@param DataMask A pointer to the data mask to be AND-ed with the data read from the register.
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN_SUCCESS Opcode is added.
**/
@@ -1206,62 +1216,67 @@ EFIAPI
S3BootScriptSavePciCfgWrite (
IN S3_BOOT_SCRIPT_LIB_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
UINT8 WidthInByte;
EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE ScriptPciWrite;
if (Width == S3BootScriptWidthUint64 ||
Width == S3BootScriptWidthFifoUint64 ||
Width == S3BootScriptWidthFillUint64) {
return EFI_INVALID_PARAMETER;
}
- WidthInByte = (UINT8) (0x01 << (Width & 0x03));
+ Status = SafeUintnToUint8 (Count, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Mult (Length, 0x01 << (Width & 0x03), &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
- //
- // Truncation check
- //
- if ((Count > MAX_UINT8) ||
- (WidthInByte * Count > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE))) {
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE) + (WidthInByte * Count));
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptPciWrite.OpCode = EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE_OPCODE;
ScriptPciWrite.Length = Length;
ScriptPciWrite.Width = Width;
ScriptPciWrite.Address = Address;
ScriptPciWrite.Count = (UINT32) Count;
CopyMem ((VOID*)Script, (VOID*)&ScriptPciWrite, sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE)), Buffer, WidthInByte * Count);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Adds a record for a PCI configuration space modify operation into a specified boot script table.
@param Width The width of the I/O operations.Enumerated in S3_BOOT_SCRIPT_LIB_WIDTH.
@param Address The address within the PCI configuration space.
@param Data A pointer to the data to be OR-ed.The size depends on Width.
@param DataMask A pointer to the data mask to be AND-ed.
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN__SUCCESS Opcode is added.
@note A known Limitations in the implementation which is 64bits operations are not supported.
**/
@@ -1331,65 +1346,70 @@ EFIAPI
S3BootScriptSavePciCfg2Write (
IN S3_BOOT_SCRIPT_LIB_WIDTH Width,
IN UINT16 Segment,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
UINT8 WidthInByte;
EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE ScriptPciWrite2;
if (Width == S3BootScriptWidthUint64 ||
Width == S3BootScriptWidthFifoUint64 ||
Width == S3BootScriptWidthFillUint64) {
return EFI_INVALID_PARAMETER;
}
- WidthInByte = (UINT8) (0x01 << (Width & 0x03));
+ Status = SafeUintnToUint8 (Count, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Mult (Length, 0x01 << (Width & 0x03), &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
- //
- // Truncation check
- //
- if ((Count > MAX_UINT8) ||
- (WidthInByte * Count > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE))) {
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE) + (WidthInByte * Count));
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptPciWrite2.OpCode = EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE_OPCODE;
ScriptPciWrite2.Length = Length;
ScriptPciWrite2.Width = Width;
ScriptPciWrite2.Address = Address;
ScriptPciWrite2.Segment = Segment;
ScriptPciWrite2.Count = (UINT32)Count;
CopyMem ((VOID*)Script, (VOID*)&ScriptPciWrite2, sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE)), Buffer, WidthInByte * Count);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Adds a record for a PCI configuration 2 space modify operation into a specified boot script table.
@param Width The width of the I/O operations.Enumerated in S3_BOOT_SCRIPT_LIB_WIDTH.
@param Segment The PCI segment number for Address.
@param Address The address within the PCI configuration space.
@param Data A pointer to the data to be OR-ed. The size depends on Width.
@param DataMask A pointer to the data mask to be AND-ed.
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN_SUCCESS Opcode is added.
@note A known Limitations in the implementation which is 64bits operations are not supported.
**/
@@ -1560,64 +1580,66 @@ EFIAPI
S3BootScriptSaveSmbusExecute (
IN UINTN SmBusAddress,
IN EFI_SMBUS_OPERATION Operation,
IN UINTN *Length,
IN VOID *Buffer
)
{
EFI_STATUS Status;
UINTN BufferLength;
UINT8 DataSize;
UINT8 *Script;
EFI_BOOT_SCRIPT_SMBUS_EXECUTE ScriptSmbusExecute;
if (Length == NULL) {
BufferLength = 0;
} else {
BufferLength = *Length;
}
Status = CheckParameters (SmBusAddress, Operation, &BufferLength, Buffer);
if (EFI_ERROR (Status)) {
return Status;
}
- //
- // Truncation check
- //
- if (BufferLength > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_SMBUS_EXECUTE)) {
+ Status = SafeUintnToUint8 (BufferLength, &DataSize);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Add (DataSize, sizeof (EFI_BOOT_SCRIPT_SMBUS_EXECUTE), &DataSize);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- DataSize = (UINT8)(sizeof (EFI_BOOT_SCRIPT_SMBUS_EXECUTE) + BufferLength);
Script = S3BootScriptGetEntryAddAddress (DataSize);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptSmbusExecute.OpCode = EFI_BOOT_SCRIPT_SMBUS_EXECUTE_OPCODE;
ScriptSmbusExecute.Length = DataSize;
ScriptSmbusExecute.SmBusAddress = (UINT64) SmBusAddress;
ScriptSmbusExecute.Operation = Operation;
ScriptSmbusExecute.DataSize = (UINT32) BufferLength;
CopyMem ((VOID*)Script, (VOID*)&ScriptSmbusExecute, sizeof (EFI_BOOT_SCRIPT_SMBUS_EXECUTE));
CopyMem (
(VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_SMBUS_EXECUTE)),
Buffer,
BufferLength
);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Adds a record for an execution stall on the processor into a specified boot script table.
@param Duration Duration in microseconds of the stall
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN_SUCCESS Opcode is added.
**/
@@ -1768,48 +1790,51 @@ EFIAPI
S3BootScriptSaveInformation (
IN UINT32 InformationLength,
IN VOID *Information
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
EFI_BOOT_SCRIPT_INFORMATION ScriptInformation;
- //
- // Truncation check
- //
- if (InformationLength > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_INFORMATION)) {
+ Status = SafeUint32ToUint8 (InformationLength, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_INFORMATION), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_INFORMATION) + InformationLength);
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptInformation.OpCode = EFI_BOOT_SCRIPT_INFORMATION_OPCODE;
ScriptInformation.Length = Length;
ScriptInformation.InformationLength = InformationLength;
CopyMem ((VOID*)Script, (VOID*)&ScriptInformation, sizeof (EFI_BOOT_SCRIPT_INFORMATION));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_INFORMATION)), (VOID *) Information, (UINTN) InformationLength);
SyncBootScript (Script);
return RETURN_SUCCESS;
}
/**
Store a string in the boot script table. This opcode is a no-op on dispatch and is only
used for debugging script issues.
@param String The string to save to boot script table
@retval RETURN_OUT_OF_RESOURCES Not enough memory for the table do operation.
@retval RETURN_SUCCESS Opcode is added.
**/
@@ -2231,62 +2256,65 @@ EFIAPI
S3BootScriptLabelInternal (
IN BOOLEAN BeforeOrAfter,
IN OUT VOID **Position OPTIONAL,
IN UINT32 InformationLength,
IN CONST CHAR8 *Information
)
{
+ EFI_STATUS Status;
UINT8 Length;
UINT8 *Script;
EFI_BOOT_SCRIPT_INFORMATION ScriptInformation;
- //
- // Truncation check
- //
- if (InformationLength > MAX_UINT8 - sizeof (EFI_BOOT_SCRIPT_INFORMATION)) {
+ Status = SafeUint32ToUint8 (InformationLength, &Length);
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = SafeUint8Add (Length, sizeof (EFI_BOOT_SCRIPT_INFORMATION), &Length);
+ if (EFI_ERROR (Status)) {
return RETURN_OUT_OF_RESOURCES;
}
- Length = (UINT8)(sizeof (EFI_BOOT_SCRIPT_INFORMATION) + InformationLength);
Script = S3BootScriptGetEntryAddAddress (Length);
if (Script == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
//
// Build script data
//
ScriptInformation.OpCode = S3_BOOT_SCRIPT_LIB_LABEL_OPCODE;
ScriptInformation.Length = Length;
ScriptInformation.InformationLength = InformationLength;
CopyMem ((VOID*)Script, (VOID*)&ScriptInformation, sizeof (EFI_BOOT_SCRIPT_INFORMATION));
CopyMem ((VOID*)(Script + sizeof (EFI_BOOT_SCRIPT_INFORMATION)), (VOID *) Information, (UINTN) InformationLength);
SyncBootScript (Script);
return S3BootScriptMoveLastOpcode (BeforeOrAfter, Position);
}
/**
Find a label within the boot script table and, if not present, optionally create it.
@param BeforeOrAfter Specifies whether the opcode is stored before (TRUE)
or after (FALSE) the position in the boot script table
specified by Position.
@param CreateIfNotFound Specifies whether the label will be created if the label
does not exists (TRUE) or not (FALSE).
@param Position On entry, specifies the position in the boot script table
where the opcode will be inserted, either before or after,
depending on BeforeOrAfter. On exit, specifies the position
of the inserted opcode in the boot script table.
@param Label Points to the label which will be inserted in the boot script table.
@retval EFI_SUCCESS The operation succeeded. A record was added into the
specified script table.
@retval EFI_INVALID_PARAMETER The parameter is illegal or the given boot script is not supported.
If the opcode is unknow or not supported because of the PCD
Feature Flags.
@retval EFI_OUT_OF_RESOURCES There is insufficient memory to store the boot script.
**/
--
2.21.1
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