Prevent adding referenced pages to the free list

2026-01-06 15:01:05 +01:00
parent bee91d0c71
commit b91c79e090
2 changed files with 15 additions and 10 deletions
--- a/xtoskrnl/mm/i686/pfn.cc
+++ b/xtoskrnl/mm/i686/pfn.cc
@@ -187,8 +187,13 @@ MM::Pfn::ProcessMemoryDescriptor(IN PFN_NUMBER BasePage,
        /* Iterate over each page in this free memory run */
        for(PageNumber = 0; PageNumber < PageCount; PageNumber++)
        {
-            /* Add the page to the free list to make it available for allocation */
-            LinkFreePage(BasePage + PageNumber);
+            /* Get the PFN entry for the current page and ensure it is not referenced */
+            Pfn = GetPfnEntry(BasePage + PageNumber);
+            if(Pfn->u3.e2.ReferenceCount == 0)
+            {
+                /* Add the page to the free list to make it available for allocation */
+                LinkFreePage(BasePage + PageNumber);
+            }
        }
    }
    else