[NTOS:MM] Fix PTE protection for executable CoW pages

Fixes Blender x64. See https://jira.reactos.org/browse/CORE-19761
DarkFire01 · Oct 10, 2024 · c0590f5 · c0590f5
1 parent 52265ae
commit c0590f5
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/ntoskrnl/mm/section.c b/ntoskrnl/mm/section.c
@@ -1509,7 +1509,12 @@ MmAlterViewAttributes(PMMSUPPORT AddressSpace,
                  */
                 Page = MmGetPfnForProcess(Process, Address);
 
-                Protect = PAGE_READONLY;
+                /* Choose protection based on what was requested */
+                if (NewProtect == PAGE_EXECUTE_READWRITE)
+                    Protect = PAGE_EXECUTE_READ;
+                else
+                    Protect = PAGE_READONLY;
+
                 if (IS_SWAP_FROM_SSE(Entry) || PFN_FROM_SSE(Entry) != Page)
                 {
                     Protect = NewProtect;