Question on RSA context of CA certificate clean up by x509_free about openssl HOT 2 CLOSED

static int rsa_ossl_finish(RSA *rsa)
{
    int i;
    RSA_PRIME_INFO *pinfo;

    BN_MONT_CTX_free(rsa->_method_mod_n);
    BN_MONT_CTX_free(rsa->_method_mod_p);
    BN_MONT_CTX_free(rsa->_method_mod_q);
    for (i = 0; i < sk_RSA_PRIME_INFO_num(rsa->prime_infos); i++) {
        pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
        BN_MONT_CTX_free(pinfo->m);
    }
    return 1;
}