diff options
| -rw-r--r-- | MdeModulePkg/Core/DxeIplPeim/DxeLoad.c | 49 | ||||
| -rw-r--r-- | Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c | 49 |
2 files changed, 96 insertions, 2 deletions
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c b/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c index d0baf2e..dea627e 100644 --- a/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c +++ b/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c @@ -125,6 +125,53 @@ PeimInitializeDxeIpl ( }
/**
+ Validate variable data for the MemoryTypeInformation.
+
+ @param MemoryData Variable data.
+ @param MemoryDataSize Variable data length.
+
+ @return TRUE The variable data is valid.
+ @return FALSE The variable data is invalid.
+
+**/
+BOOLEAN
+ValidateMemoryTypeInfoVariable (
+ IN EFI_MEMORY_TYPE_INFORMATION *MemoryData,
+ IN UINTN MemoryDataSize
+ )
+{
+ UINTN Count;
+ UINTN Index;
+
+ // Check the input parameter.
+ if (MemoryData == NULL) {
+ return FALSE;
+ }
+
+ // Get Count
+ Count = MemoryDataSize / sizeof (*MemoryData);
+
+ // Check Size
+ if (Count * sizeof(*MemoryData) != MemoryDataSize) {
+ return FALSE;
+ }
+
+ // Check last entry type filed.
+ if (MemoryData[Count - 1].Type != EfiMaxMemoryType) {
+ return FALSE;
+ }
+
+ // Check the type filed.
+ for (Index = 0; Index < Count - 1; Index++) {
+ if (MemoryData[Index].Type >= EfiMaxMemoryType) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/**
Main entry point to last PEIM.
This function finds DXE Core in the firmware volume and transfer the control to
@@ -214,7 +261,7 @@ DxeLoadCore ( &DataSize,
&MemoryData
);
- if (!EFI_ERROR (Status)) {
+ if (!EFI_ERROR (Status) && ValidateMemoryTypeInfoVariable(MemoryData, DataSize)) {
//
// Build the GUID'd HOB for DXE
//
diff --git a/Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c b/Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c index 90a97b9..ab5fd0f 100644 --- a/Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c +++ b/Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c @@ -49,6 +49,53 @@ EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = { { EfiMaxMemoryType, 0 }
};
+/**
+ Validate variable data for the MemoryTypeInformation.
+
+ @param MemoryData Variable data.
+ @param MemoryDataSize Variable data length.
+
+ @return TRUE The variable data is valid.
+ @return FALSE The variable data is invalid.
+
+**/
+BOOLEAN
+ValidateMemoryTypeInfoVariable (
+ IN EFI_MEMORY_TYPE_INFORMATION *MemoryData,
+ IN UINTN MemoryDataSize
+ )
+{
+ UINTN Count;
+ UINTN Index;
+
+ // Check the input parameter.
+ if (MemoryData == NULL) {
+ return FALSE;
+ }
+
+ // Get Count
+ Count = MemoryDataSize / sizeof (*MemoryData);
+
+ // Check Size
+ if (Count * sizeof(*MemoryData) != MemoryDataSize) {
+ return FALSE;
+ }
+
+ // Check last entry type filed.
+ if (MemoryData[Count - 1].Type != EfiMaxMemoryType) {
+ return FALSE;
+ }
+
+ // Check the type filed.
+ for (Index = 0; Index < Count - 1; Index++) {
+ if (MemoryData[Index].Type >= EfiMaxMemoryType) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
EFI_STATUS
EFIAPI
PeimInitializeWinNtAutoScan (
@@ -153,7 +200,7 @@ Returns: &DataSize,
&MemoryData
);
- if (EFI_ERROR (Status)) {
+ if (EFI_ERROR (Status) || !ValidateMemoryTypeInfoVariable(MemoryData, DataSize)) {
//
// Create Memory Type Information HOB
//
|