sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve robustness when scanning PCI Option ROM.

Browse Source 
Signed-off-by: rsun3
Reviewed-by: geekboy15a


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13095 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3
2012-03-14 03:17:17 +00:00
parent 8a44cd74ec
commit 94020bb40f
9 changed files with 234 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/BiosSnp16.c
View File

@@ -1,6 +1,6 @@
/** @file
Copyright (c) 1999 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 1999 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -1226,6 +1226,16 @@ Undi16SimpleNetworkLoadUndi (
DEBUG ((DEBUG_INIT, "Option ROM found at %X\n", RomAddress));
//
// If the pointer to the PCI Data Structure is invalid, no further images can be located.
// The PCI Data Structure must be DWORD aligned.
//
if (PciExpansionRomHeader->PcirOffset == 0 ||
(PciExpansionRomHeader->PcirOffset & 3) != 0 ||
RomAddress + PciExpansionRomHeader->PcirOffset + sizeof (PCI_DATA_STRUCTURE) > 0x100000) {
break;
}
PciDataStructure = (PCI_DATA_STRUCTURE *) (RomAddress + PciExpansionRomHeader->PcirOffset);
if (PciDataStructure->Signature != PCI_DATA_STRUCTURE_SIGNATURE) {