bool net_tx_pkt_send(struct NetTxPkt *pkt, NetClientState *nc)
{
    assert(pkt);

    if (!pkt->has_virt_hdr &&
        pkt->virt_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
        net_tx_pkt_do_sw_csum(pkt);
    }

    /*
     * Since underlying infrastructure does not support IP datagrams longer
     * than 64K we should drop such packets and don't even try to send
     */
    if (VIRTIO_NET_HDR_GSO_NONE != pkt->virt_hdr.gso_type) {
        if (pkt->payload_len >
            ETH_MAX_IP_DGRAM_LEN -
            pkt->vec[NET_TX_PKT_L3HDR_FRAG].iov_len) {
            return false;
        }
    }

    if (pkt->has_virt_hdr ||
        pkt->virt_hdr.gso_type == VIRTIO_NET_HDR_GSO_NONE) {
        net_tx_pkt_sendv(pkt, nc, pkt->vec,
            pkt->payload_frags + NET_TX_PKT_PL_START_FRAG);
        return true;
    }

    return net_tx_pkt_do_sw_fragmentation(pkt, nc);
}

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.