diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
index 4ce83ce22d..0535cd7335 100644
--- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
+++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
@@ -1069,6 +1069,9 @@ BmExpandMediaDevicePath (
   //
   Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);
   ASSERT_EFI_ERROR (Status);
+  if (EFI_ERROR (Status)) {
+    return NULL;
+  }
   Buffer = AllocatePool (BlockIo->Media->BlockSize);
   if (Buffer != NULL) {
     BlockIo->ReadBlocks (