#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
static uint16_t
af_xdp_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{

...
        for (i = 0; i < nb_pkts; i++) {
                mbuf = bufs[i];

                if (mbuf->pool == umem->mb_pool) {
...
                } else {
...
                        desc->addr = addr | offset;
                        rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *),
                                        desc->len);
                        rte_pktmbuf_free(mbuf);
                        count++;
                }

                tx_bytes += mbuf->pkt_len; <<< use after free above