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enhanced check when reading BMP file. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8859 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2009-07-10 05:03:24 +00:00
parent d405baa0b6
commit d2eec31912
1 changed files with 9 additions and 8 deletions
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17
IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c
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@ -629,14 +629,15 @@ ConvertBmpToGopBlt (
//
// Calculate the BltBuffer needed size.
//
BltBufferSize = BmpHeader->PixelWidth * BmpHeader->PixelHeight * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
if (BltBufferSize >= SIZE_4GB) {
//
// If the BMP resolution is too large
//
return EFI_UNSUPPORTED;
}
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))) {
return EFI_UNSUPPORTED;
}
BltBufferSize = MultU64x32 (BltBufferSize, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
IsAllocated = FALSE;
if (*GopBlt == NULL) {
//