KMSAN_META_SHADOW
shadow_start = kmsan_get_metadata(addr, KMSAN_META_SHADOW);
KMSAN_META_SHADOW);
shadow_dst = kmsan_get_metadata(dst, KMSAN_META_SHADOW);
shadow_src = kmsan_get_metadata(src, KMSAN_META_SHADOW);
KMSAN_META_SHADOW);
if (!kmsan_get_metadata(addr, KMSAN_META_SHADOW))
shadow_start = vmalloc_meta((void *)start, KMSAN_META_SHADOW);
shadow_end = vmalloc_meta((void *)end, KMSAN_META_SHADOW);
shadow = kmsan_get_metadata(address, KMSAN_META_SHADOW);