3rd win fx

Author: talili-rsec

sql/sp_head.cc

@@ -1711,9 +1711,10 @@ int is_valid_pointer(void *ptr) {
     return 0;
   if (mbi.Protect & (PAGE_GUARD | PAGE_NOACCESS))
     return 0;
-  // Verify read access is allowed
-  if (!(mbi.Protect & (PAGE_READONLY | PAGE_READWRITE | PAGE_EXECUTE_READ |
-      PAGE_EXECUTE_READWRITE)))
+  // Strip modifier flags (PAGE_GUARD, PAGE_NOCACHE, etc.) to get base protection
+  DWORD base_protect = mbi.Protect & 0xFF;
+  // Reject execute-only pages (all other base protections allow reading)
+  if (base_protect == PAGE_EXECUTE)
     return 0;
 
   return 1;