From e2c7d0f9196d0f5887adeed3b78e450759e205f9 Mon Sep 17 00:00:00 2001
From: belliash <belliash@codingworkshop.eu.org>
Date: Thu, 23 Feb 2023 00:39:13 +0100
Subject: [PATCH] Zero fill memory map before fetching it once again

---
 xtldr/i686/memory.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/xtldr/i686/memory.c b/xtldr/i686/memory.c
index 39c16e1..dd67dc5 100644
--- a/xtldr/i686/memory.c
+++ b/xtldr/i686/memory.c
@@ -168,7 +168,7 @@ BlEnablePaging(IN PLIST_ENTRY MemoryMappings,
         return Status;
     }
 
-    /* Iterate through and map all the mappings*/
+    /* Iterate through and map all the mappings */
     BlDbgPrint(L"Mapping and dumping EFI memory:\n");
     ListEntry = MemoryMappings->Flink;
     while(ListEntry != MemoryMappings)
@@ -197,6 +197,9 @@ BlEnablePaging(IN PLIST_ENTRY MemoryMappings,
         ListEntry = ListEntry->Flink;
     }
 
+    /* Zero-fill buffer for EFI memory map */
+    RtlZeroMemory(MemoryMap, sizeof(EFI_MEMORY_MAP));
+
     /* Get EFI memory map and prepare for exiting boot services */
     BlDbgPrint(L"Exiting EFI boot services\n");
     Status = BlGetMemoryMap(MemoryMap);