c
// Modify the ptep_get function to include validation
pte_t ptep_get(pte_t *pte) {
    if (is_valid_pte_range(pte)) {
        return *pte;
    } else {
        // Handle the error or return a safe default value
        return default_pte_value();
    }
}

// Original function remains mostly unchanged
static void make_uffd_wp_pte(struct vm_area_struct *vma,
                             unsigned long addr, pte_t *pte) {
    pte_t ptent = ptep_get(pte);
    if (pte_present(ptent)) {
        ptent = pte_mkuffd_wp(ptent);
    }
    // Rest of the code...
}
