Along with above changes, ops mempool has to be updated with
sizeof(union rte_event_crypto_metadata) as below:

	params.op_mpool = rte_crypto_op_pool_create(
			"EVENT_CRYPTO_SYM_OP_POOL",
			RTE_CRYPTO_OP_TYPE_SYMMETRIC,
			NUM_MBUFS, MBUF_CACHE_SIZE,
			DEFAULT_NUM_XFORMS *
			sizeof(struct rte_crypto_sym_xform) +
			MAXIMUM_IV_LENGTH +
+			sizeof(union rte_event_crypto_metadata),
			rte_socket_id());

Do you agree?

Ack