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Enhanced BMP file security check. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9010 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2009-07-27 02:23:19 +00:00
parent 0adb8a3c47
commit 99f6759411
2 changed files with 28 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c
View File

@ -1,6 +1,6 @@
/*++
Copyright (c) 2004 - 2007, Intel Corporation
Copyright (c) 2004 - 2009, Intel Corporation
All rights reserved. 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
@ -157,7 +157,7 @@ Returns:
BMP_COLOR_MAP *BmpColorMap;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Blt;
UINTN BltBufferSize;
UINT64 BltBufferSize;
UINTN Index;
UINTN Height;
UINTN Width;
@ -185,18 +185,26 @@ Returns:
Image = ((UINT8 *) BmpImage) + BmpHeader->ImageOffset;
ImageHeader = Image;
BltBufferSize = BmpHeader->PixelWidth * BmpHeader->PixelHeight * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
BltBufferSize = MultU64x32 ((UINT64) BmpHeader->PixelWidth, BmpHeader->PixelHeight);
//
// Ensure the BltBufferSize * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL) doesn't overflow
//
if (BltBufferSize > DivU64x32 ((UINTN) ~0, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL), NULL)) {
return EFI_UNSUPPORTED;
}
BltBufferSize = MultU64x32 (BltBufferSize, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
IsAllocated = FALSE;
if (*GopBlt == NULL) {
*GopBltSize = BltBufferSize;
*GopBltSize = (UINTN) BltBufferSize;
*GopBlt = EfiLibAllocatePool (*GopBltSize);
IsAllocated = TRUE;
if (*GopBlt == NULL) {
return EFI_OUT_OF_RESOURCES;
}
} else {
if (*GopBltSize < BltBufferSize) {
*GopBltSize = BltBufferSize;
if (*GopBltSize < (UINTN) BltBufferSize) {
*GopBltSize = (UINTN) BltBufferSize;
return EFI_BUFFER_TOO_SMALL;
}
}

20
EdkCompatibilityPkg/Foundation/Library/Dxe/GraphicsLite/Graphics.c
View File

@ -1,6 +1,6 @@
/*++
Copyright (c) 2004 - 2006, Intel Corporation
Copyright (c) 2004 - 2009, Intel Corporation
All rights reserved. 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
@ -158,7 +158,7 @@ Returns:
BMP_COLOR_MAP *BmpColorMap;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer;
EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Blt;
UINTN BltBufferSize;
UINT64 BltBufferSize;
UINTN Index;
UINTN Height;
UINTN Width;
@ -186,18 +186,26 @@ Returns:
Image = ((UINT8 *) BmpImage) + BmpHeader->ImageOffset;
ImageHeader = Image;
BltBufferSize = BmpHeader->PixelWidth * BmpHeader->PixelHeight * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
BltBufferSize = MultU64x32 ((UINT64) BmpHeader->PixelWidth, BmpHeader->PixelHeight);
//
// Ensure the BltBufferSize * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL) doesn't overflow
//
if (BltBufferSize > DivU64x32 ((UINTN) ~0, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL), NULL)) {
return EFI_UNSUPPORTED;
}
BltBufferSize = MultU64x32 (BltBufferSize, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
IsAllocated = FALSE;
if (*GopBlt == NULL) {
*GopBltSize = BltBufferSize;
*GopBltSize = (UINTN) BltBufferSize;
*GopBlt = EfiLibAllocatePool (*GopBltSize);
IsAllocated = TRUE;
if (*GopBlt == NULL) {
return EFI_OUT_OF_RESOURCES;
}
} else {
if (*GopBltSize < BltBufferSize) {
*GopBltSize = BltBufferSize;
if (*GopBltSize < (UINTN) BltBufferSize) {
*GopBltSize = (UINTN) BltBufferSize;
return EFI_BUFFER_TOO_SMALL;
}
}