if (!RTE_MBUF_DIRECT(*m) || rte_mbuf_refcnt_read(*m) > 1)
return -EINVAL;
+ /* Can't insert header if the first segment is too short */
+ if (rte_pktmbuf_data_len(*m) < 2 * RTE_ETHER_ADDR_LEN)
+ return -EINVAL;
+
oh = rte_pktmbuf_mtod(*m, struct rte_ether_hdr *);
nh = (struct rte_ether_hdr *)
rte_pktmbuf_prepend(*m, sizeof(struct rte_vlan_hdr));