tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-07-29 16:44:10 +02:00
Code Issues Packages Projects Releases Wiki Activity

MdeModulePkg PartitionDxe: Ensure the NumberOfPartitionEntries * SizeOfPartitionEntry doesn't overflow.

Browse Source 
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14520 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng 2013-07-31 01:09:38 +00:00 committed by lzeng14
parent e3df6949e7
commit b4e027f1c6
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
MdeModulePkg/Universal/Disk/PartitionDxe/Gpt.c
View File

@ -13,7 +13,7 @@
PartitionValidGptTable(), PartitionCheckGptEntry() routine will accept disk PartitionValidGptTable(), PartitionCheckGptEntry() routine will accept disk
partition content and validate the GPT table and GPT entry. partition content and validate the GPT table and GPT entry.
Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License 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 which accompanies this distribution. The full text of the license may be found at
@ -487,13 +487,22 @@ PartitionValidGptTable (
if ((PartHdr->Header.Signature != EFI_PTAB_HEADER_ID) || if ((PartHdr->Header.Signature != EFI_PTAB_HEADER_ID) ||
!PartitionCheckCrc (BlockSize, &PartHdr->Header) || !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||
PartHdr->MyLBA != Lba PartHdr->MyLBA != Lba ||
(PartHdr->SizeOfPartitionEntry < sizeof (EFI_PARTITION_ENTRY))
) { ) {
DEBUG ((EFI_D_INFO, "Invalid efi partition table header\n")); DEBUG ((EFI_D_INFO, "Invalid efi partition table header\n"));
FreePool (PartHdr); FreePool (PartHdr);
return FALSE; return FALSE;
} }
//
// Ensure the NumberOfPartitionEntries * SizeOfPartitionEntry doesn't overflow.
//
if (PartHdr->NumberOfPartitionEntries > DivU64x32 (MAX_UINTN, PartHdr->SizeOfPartitionEntry)) {
FreePool (PartHdr);
return FALSE;
}
CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER)); CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));
if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) { if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {
FreePool (PartHdr); FreePool (PartHdr);