int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
{
    int sig_id, md_id;
    if (!md)
        return 0;
    md_id = tls12_find_id(EVP_MD_type(md), tls12_md, OSSL_NELEM(tls12_md));
    if (md_id == -1)
        return 0;
    sig_id = tls12_get_sigid(pk);
    if (sig_id == -1)
        return 0;
    p[0] = (unsigned char)md_id;
    p[1] = (unsigned char)sig_id;
    return 1;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.