diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c b/EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c index 61929d5bd9..0844a6f30d 100644 --- a/EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c +++ b/EdkCompatibilityPkg/Foundation/Library/Dxe/Graphics/Graphics.c @@ -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;
}
}
|