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Improve robustness when scanning PCI Option ROM.

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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
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14
DuetPkg/PciRootBridgeNoEnumerationDxe/X64/PcatIo.c
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@@ -1,6 +1,6 @@
/*++
Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
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
@@ -436,8 +436,10 @@ CheckForRom (
Pcir.ImageLength = 0;
if (EfiRomHeader.Signature == 0xaa55) {
if (EfiRomHeader.Signature == PCI_EXPANSION_ROM_HEADER_SIGNATURE &&
EfiRomHeader.PcirOffset != 0 &&
(EfiRomHeader.PcirOffset & 3) == 0 &&
RomBarSize + EfiRomHeader.PcirOffset + sizeof (PCI_DATA_STRUCTURE) <= MaxRomSize) {
ZeroMem (&Pcir, sizeof(Pcir));
IoDev->Mem.Read (
IoDev,
@@ -447,6 +449,12 @@ CheckForRom (
&Pcir
);
if (Pcir.Signature != PCI_DATA_STRUCTURE_SIGNATURE) {
break;
}
if (RomBarSize + Pcir.ImageLength * 512 > MaxRomSize) {
break;
}
if ((Pcir.Indicator & 0x80) == 0x00) {
LastImage = FALSE;
}