ofproto_port_del(struct ofproto *ofproto, ofp_port_t ofp_port)
{
    struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
    const char *name = ofport ? netdev_get_name(ofport->netdev) : "<unknown>";
    struct simap_node *ofp_request_node;
    int error;

    ofp_request_node = simap_find(&ofproto->ofp_requests, name);
    if (ofp_request_node) {
        simap_delete(&ofproto->ofp_requests, ofp_request_node);
    }

    error = ofproto->ofproto_class->port_del(ofproto, ofp_port);
    if (!error && ofport) {
        /* 'name' is the netdev's name and update_port() is going to close the
         * netdev.  Just in case update_port() refers to 'name' after it
         * destroys 'ofport', make a copy of it around the update_port()
         * call. */
        char *devname = xstrdup(name);
        update_port(ofproto, devname);
        free(devname);
    }
    return error;
}

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.