kasan_update_early_region
void kasan_update_early_region(unsigned long k_start, unsigned long k_end, pte_t pte);
kasan_update_early_region(k_start, k_nobat, __pte(0));
kasan_update_early_region(KASAN_SHADOW_START, KASAN_SHADOW_END,
kasan_update_early_region(k_start, k_end, __pte(0));
kasan_update_early_region(k_start, k_end, __pte(0));