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fixed overflow issue when reading BMP file. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8084 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2009-04-15 03:03:28 +00:00
parent cb7d01c0c9
commit 88f2bdb51d
1 changed files with 10 additions and 3 deletions
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13
IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c
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@ -587,7 +587,7 @@ ConvertBmpToGopBlt (
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;
@ -623,12 +623,19 @@ 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;
}
IsAllocated = FALSE;
if (*GopBlt == NULL) {
//
// GopBlt is not allocated by caller.
//
*GopBltSize = BltBufferSize;
*GopBltSize = (UINTN) BltBufferSize;
*GopBlt = AllocatePool (*GopBltSize);
IsAllocated = TRUE;
if (*GopBlt == NULL) {
@ -639,7 +646,7 @@ ConvertBmpToGopBlt (
// GopBlt has been allocated by caller.
//
if (*GopBltSize < BltBufferSize) {
*GopBltSize = BltBufferSize;
*GopBltSize = (UINTN) BltBufferSize;
return EFI_BUFFER_TOO_SMALL;
}
}