net/virtio: fix memory leak in mergeable Rx

When there is no enough segments for a packet in mergeable
Rx path, we should free the whole mbuf chain instead of just
recycling the last segment.

Fixes: bcac5aa207f8 ("net/virtio: improve batching in mergeable path")
Cc: stable@dpdk.org
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index e4d5b6f..98f4b00 100644 (file)
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -1736,7 +1736,7 @@ virtio_recv_mergeable_pkts(void *rx_queue,
                } else {
                        PMD_RX_LOG(ERR,
                                        "No enough segments for packet.");
-                       virtio_discard_rxbuf(vq, prev);
+                       rte_pktmbuf_free(rx_pkts[nb_rx]);
                        rxvq->stats.errors++;
                        break;
                }