static void parse_chap(struct iscsi_context *iscsi, const char *target,
                       Error **errp)
{
    QemuOptsList *list;
    QemuOpts *opts;
    const char *user = NULL;
    const char *password = NULL;
    const char *secretid;
    char *secret = NULL;

    list = qemu_find_opts("iscsi");
    if (!list) {
        return;
    }

    opts = qemu_opts_find(list, target);
    if (opts == NULL) {
        opts = QTAILQ_FIRST(&list->head);
        if (!opts) {
            return;
        }
    }

    user = qemu_opt_get(opts, "user");
    if (!user) {
        return;
    }

    secretid = qemu_opt_get(opts, "password-secret");
    password = qemu_opt_get(opts, "password");
    if (secretid && password) {
        error_setg(errp, "'password' and 'password-secret' properties are "
                   "mutually exclusive");
        return;
    }
    if (secretid) {
        secret = qcrypto_secret_lookup_as_utf8(secretid, errp);
        if (!secret) {
            return;
        }
        password = secret;
    } else if (!password) {
        error_setg(errp, "CHAP username specified but no password was given");
        return;
    }

    if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
        error_setg(errp, "Failed to set initiator username and password");
    }

    g_free(secret);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.