From 182715ed507dba1aa597881a15cc43fe73408e77 Mon Sep 17 00:00:00 2001
From: Eric Kohl <eric.kohl@reactos.org>
Date: Mon, 15 Dec 2025 20:11:59 +0100
Subject: [PATCH] [DISKPART] Prevent EFI- and MSR-Partitions from accidental
 deletion

---
 base/system/diskpart/delete.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/base/system/diskpart/delete.c b/base/system/diskpart/delete.c
index 304eed72be9..580fccd6d42 100644
--- a/base/system/diskpart/delete.c
+++ b/base/system/diskpart/delete.c
@@ -173,13 +173,14 @@ DeleteGptPartition(
         List->SystemPartition = NULL;
     }
 #endif
-#if 0
-    if ((bOverride == FALSE) && (IsKnownPartition(CurrentPartition) == FALSE))
+
+    if ((bOverride == FALSE) &&
+        ((memcmp(&CurrentPartition->Gpt.PartitionType, &PARTITION_SYSTEM_GUID, sizeof(GUID)) == 0) ||
+         (memcmp(&CurrentPartition->Gpt.PartitionType, &PARTITION_MSFT_RESERVED_GUID, sizeof(GUID)) == 0)))
     {
         ConResPuts(StdOut, IDS_DELETE_PARTITION_FAIL);
         return;
     }
-#endif
 
 #ifdef DUMP_PARTITION_LIST
     DumpPartitionList(CurrentDisk);