diff options
| author | Rebecca Cran <rebecca@bsdio.com> | 2024-05-29 23:51:33 -0600 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-06-07 11:35:47 +0000 |
| commit | 8c826be35c736f4b718c8f927853aa957a1973d8 (patch) | |
| tree | 6b7970f7b215d255035da8862e41c8970b9f180e /MdeModulePkg | |
| parent | 665b223d57369d8b28dcdc81352428adfe435ff4 (diff) | |
| download | edk2-8c826be35c736f4b718c8f927853aa957a1973d8.zip edk2-8c826be35c736f4b718c8f927853aa957a1973d8.tar.gz edk2-8c826be35c736f4b718c8f927853aa957a1973d8.tar.bz2 | |
MdeModulePkg: In RemoveTableFromRsdt don't read from unallocated memory
Instead of copying from unallocated memory in RemoveTableFromRsdt, do a
CopyMem followed by ZeroMem.
Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Diffstat (limited to 'MdeModulePkg')
| -rw-r--r-- | MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c b/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c index 5f8d20a..45c0ae6 100644 --- a/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c +++ b/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c @@ -1279,16 +1279,16 @@ RemoveTableFromRsdt ( {
//
// Found entry, so copy all following entries and shrink table
- // We actually copy all + 1 to copy the initialized value of memory over
- // the last entry.
//
if (Rsdt != NULL) {
- CopyMem (CurrentRsdtEntry, CurrentRsdtEntry + 1, (*NumberOfTableEntries - Index) * sizeof (UINT32));
+ CopyMem (CurrentRsdtEntry, CurrentRsdtEntry + 1, (*NumberOfTableEntries - Index - 1) * sizeof (UINT32));
+ ZeroMem ((UINT8 *)Rsdt + sizeof (EFI_ACPI_DESCRIPTION_HEADER) + ((*NumberOfTableEntries - 1) * sizeof (UINT32)), sizeof (UINT32));
Rsdt->Length = Rsdt->Length - sizeof (UINT32);
}
if (Xsdt != NULL) {
- CopyMem (CurrentXsdtEntry, ((UINT64 *)CurrentXsdtEntry) + 1, (*NumberOfTableEntries - Index) * sizeof (UINT64));
+ CopyMem (CurrentXsdtEntry, ((UINT64 *)CurrentXsdtEntry) + 1, (*NumberOfTableEntries - Index - 1) * sizeof (UINT64));
+ ZeroMem ((UINT8 *)Xsdt + sizeof (EFI_ACPI_DESCRIPTION_HEADER) + ((*NumberOfTableEntries - 1) * sizeof (UINT64)), sizeof (UINT64));
Xsdt->Length = Xsdt->Length - sizeof (UINT64);
}
|