From f653b9f79c560e0af5a924cf2b7a1bd9f5f0f37a Mon Sep 17 00:00:00 2001
From: Aiken Harris <harraiken91@gmail.com>
Date: Thu, 1 Jan 2026 20:51:30 +0100
Subject: [PATCH] Properly handle bad physical pages

---
 xtoskrnl/mm/pfn.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/xtoskrnl/mm/pfn.cc b/xtoskrnl/mm/pfn.cc
index 8fc1e7c..dfc77e7 100644
--- a/xtoskrnl/mm/pfn.cc
+++ b/xtoskrnl/mm/pfn.cc
@@ -260,6 +260,9 @@ MM::Pfn::LinkFreePage(IN PFN_NUMBER PageFrameIndex)
         /* Update cache attribute to not mapped */
         PfnEntry->u3.e1.CacheAttribute = PfnNotMapped;
 
+        /* Insert the page into the bad page list instead */
+        LinkPage(&BadPagesList, PageFrameIndex);
+
         /* Do not add it to the free list */
         return;
     }
@@ -693,8 +696,8 @@ MM::Pfn::ProcessMemoryDescriptor(IN PFN_NUMBER BasePage,
         switch(MemoryType)
         {
             case LoaderBad:
-                /* This memory is marked as bad and should not be used */
-                UNIMPLEMENTED;
+                /* This memory is marked as bad and should not be used, add it to the bad pages list */
+                LinkPage(&BadPagesList, BasePage);
                 break;
             case LoaderXIPRom:
                 /* This memory range contains Read-Only Memory (ROM) */