static int bdrv_assign_node_name(BlockDriverState *bs,
                                 const char *node_name,
                                 Error **errp)
{
    if (!node_name) {
        return 0;
    }

    /* empty string node name is invalid */
    if (node_name[0] == '\0') {
        error_setg(errp, "Empty node name");
        return -EINVAL;
    }

    /* takes care of avoiding namespaces collisions */
    if (bdrv_find(node_name)) {
        error_setg(errp, "node-name=%s is conflicting with a device id",
                   node_name);
        return -EINVAL;
    }

    /* takes care of avoiding duplicates node names */
    if (bdrv_find_node(node_name)) {
        error_setg(errp, "Duplicate node name");
        return -EINVAL;
    }

    /* copy node name into the bs and insert it into the graph list */
    pstrcpy(bs->node_name, sizeof(bs->node_name), node_name);
    QTAILQ_INSERT_TAIL(&graph_bdrv_states, bs, node_list);

    return 0;
}

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.