FSCRYPT_NOKEY_NAME_MAX_ENCODED
u32 max_presented_len = max_t(u32, FSCRYPT_NOKEY_NAME_MAX_ENCODED,
BUILD_BUG_ON(FSCRYPT_NOKEY_NAME_MAX_ENCODED > NAME_MAX);
if (iname->len > FSCRYPT_NOKEY_NAME_MAX_ENCODED)