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MdeModulePkg: Fixed memory corruption when BlockIo2 is not present 

Fixed NULL pointer reference of BlockIo2.Media in partition code.  This resulted
in the interrupt vector table being corrupted in a legacy (CSM) based system.

Signed-off-by: geekboy15a
Reviewed-by: mdkinney
Reviewed-by: niruiyu
Reviewed-by: jljusten



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11711 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
geekboy15a 2011-05-27 20:04:45 +00:00
parent f44e8c16f8
commit c582ad454b
1 changed files with 6 additions and 6 deletions
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12
MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
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@ -1053,13 +1053,13 @@ PartitionInstallChildHandle (
// for logical partitions. // for logical partitions.
// //
if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION2) { if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION2) {
Private->BlockIo.Media->LowestAlignedLba = 0; Private->Media.LowestAlignedLba = 0;
Private->BlockIo.Media->LogicalBlocksPerPhysicalBlock = 0; Private->Media.LogicalBlocksPerPhysicalBlock = 0;
Private->BlockIo2.Media->LowestAlignedLba = 0; Private->Media2.LowestAlignedLba = 0;
Private->BlockIo2.Media->LogicalBlocksPerPhysicalBlock = 0; Private->Media2.LogicalBlocksPerPhysicalBlock = 0;
if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION3) { if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION3) {
Private->BlockIo.Media->OptimalTransferLengthGranularity = 0; Private->Media.OptimalTransferLengthGranularity = 0;
Private->BlockIo2.Media->OptimalTransferLengthGranularity = 0; Private->Media2.OptimalTransferLengthGranularity = 0;
} }
} }