2 files changed, 12 insertions, 3 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c b/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
index 06b2721c64..c54983c77b 100644
--- a/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
+++ b/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
@@ -119,6 +119,14 @@ ScanGuid (
 {
   CONST GUID                        *GuidPtr;
 
+  ASSERT (Buffer != NULL);
+  //
+  // Make sure Buffer is aligned on a 64-bit boundary.
+  //
+  ASSERT (((UINTN) Buffer & 7) == 0);
+
+  ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));
+
   GuidPtr = (GUID*)Buffer;
   Buffer = GuidPtr + Length / sizeof (*GuidPtr);
   while (GuidPtr < (CONST GUID*)Buffer) {
diff --git a/MdePkg/Library/BaseMemoryLibMmx/ZeroMemWrapper.c b/MdePkg/Library/BaseMemoryLibMmx/ZeroMemWrapper.c
index d7d7919ba2..4a3d615ce5 100644
--- a/MdePkg/Library/BaseMemoryLibMmx/ZeroMemWrapper.c
+++ b/MdePkg/Library/BaseMemoryLibMmx/ZeroMemWrapper.c
@@ -43,9 +43,10 @@ VOID *
 EFIAPI
 ZeroMem (
   IN      VOID                      *Buffer,
-  IN      UINTN                     Size
+  IN      UINTN                     Length
   )
 {
-  ASSERT (Buffer != NULL);
-  return InternalMemSetMem (Buffer, Size, 0);
+  ASSERT (!(Buffer == NULL && Length > 0));
+  ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));
+  return InternalMemSetMem (Buffer, Length, 0);
 }