[PATCH] net/ice: fix memory leak in scalar Rx

[Vladimir Medvedkin <vladimir.medvedkin@intel.com>]

If the buffer splitting feature is configured and the payload mbuf
allocation fails, the previously allocated header mbuf may be returned not
fully initialized or a memory leak may occur.
This patch handles this case correctly by freeing the corresponding header
buffer.

Fixes: 629dad3ef325 ("net/ice: support buffer split in scalar Rx")
Cc: yuanx.wang@intel.com
Cc: stable@dpdk.org

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
---
 drivers/net/ice/ice_rxtx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 0c7106c7e0..f58df9bdfe 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -484,6 +484,7 @@ ice_alloc_rx_queue_mbufs(struct ice_rx_queue *rxq)
 			struct rte_mbuf *mbuf_pay;
 			mbuf_pay = rte_mbuf_raw_alloc(rxq->rxseg[1].mp);
 			if (unlikely(!mbuf_pay)) {
+				rte_pktmbuf_free(mbuf);
 				PMD_DRV_LOG(ERR, "Failed to allocate payload mbuf for RX");
 				return -ENOMEM;
 			}
@@ -1900,6 +1901,8 @@ ice_rx_alloc_bufs(struct ice_rx_queue *rxq)
 		diag_pay = rte_mempool_get_bulk(rxq->rxseg[1].mp,
 				(void *)mbufs_pay, rxq->rx_free_thresh);
 		if (unlikely(diag_pay != 0)) {
+			rte_mempool_put_bulk(rxq->mp, (void *)rxep,
+				    rxq->rx_free_thresh);
 			PMD_RX_LOG(ERR, "Failed to get payload mbufs in bulk");
 			return -ENOMEM;
 		}
@@ -2607,6 +2610,13 @@ ice_recv_pkts(void *rx_queue,
 			nmb_pay = rte_mbuf_raw_alloc(rxq->rxseg[1].mp);
 			if (unlikely(!nmb_pay)) {
 				rxq->vsi->adapter->pf.dev_data->rx_mbuf_alloc_failed++;
+				rxe->mbuf = NULL;
+				nb_hold--;
+				if (unlikely(rx_id == 0))
+					rx_id = rxq->nb_rx_desc;
+
+				rx_id--;
+				rte_pktmbuf_free(nmb);
 				break;
 			}
 
-- 
2.43.0