[dpdk-dev] [PATCH] net/iavf: fix mbuf leak

[dpdk-dev] [PATCH] net/iavf: fix mbuf leak

[Qiming Chen]

A local test found that repeated port start and stop operations during
the continuous SSE vector bufflist receiving process will cause the mbuf
resource to run out. The final positioning is when the port is stopped,
the mbuf of the pkt_first_seg pointer is not released. Resources leak.
The patch scheme is to judge whether the pointer is empty when the port
is stopped, and release the corresponding mbuf if it is not empty.

Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
Cc: stable@dpdk.org

Signed-off-by: Qiming Chen <chenqiming_huawei@163.com>
---
 drivers/net/iavf/iavf_rxtx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 55393a9400..59448eae98 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -225,6 +225,10 @@ reset_rx_queue(struct iavf_rx_queue *rxq)
 
 	rxq->rx_tail = 0;
 	rxq->nb_rx_hold = 0;
+
+	if (rxq->pkt_first_seg != NULL)
+		rte_pktmbuf_free(rxq->pkt_first_seg);
+
 	rxq->pkt_first_seg = NULL;
 	rxq->pkt_last_seg = NULL;
 	rxq->rxrearm_nb = 0;
-- 
2.30.1.windows.1

Re: [dpdk-dev] [PATCH] net/iavf: fix mbuf leak

[Zhang, Qi Z]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Qiming Chen
> Sent: Saturday, September 11, 2021 9:47 AM
> To: dev@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>;
> Qiming Chen <chenqiming_huawei@163.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/iavf: fix mbuf leak
> 
> A local test found that repeated port start and stop operations during the
> continuous SSE vector bufflist receiving process will cause the mbuf resource
> to run out. The final positioning is when the port is stopped, the mbuf of the
> pkt_first_seg pointer is not released. Resources leak.
> The patch scheme is to judge whether the pointer is empty when the port is
> stopped, and release the corresponding mbuf if it is not empty.
> 
> Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Qiming Chen <chenqiming_huawei@163.com>

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi

[dpdk-dev] [PATCH] net/iavf: fix mbuf leak

[Qiming Chen]

In the iavf_dev_rx_queue_start function, if the iavf_switch_queue
or iavf_switch_queue_lv function fails, the previously applied mbuf
is not released, resulting in leakage. The patch fixes the problem.

Fixes: 9cf9c02bf6ee ("net/iavf: add enable/disable queues for large VF")
Cc: stable@dpdk.org
---
 drivers/net/iavf/iavf_rxtx.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index e33fe4576b..55393a9400 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -848,12 +848,14 @@ iavf_dev_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 	else
 		err = iavf_switch_queue_lv(adapter, rx_queue_id, true, true);
 
-	if (err)
+	if (err) {
+		release_rxq_mbufs(rxq);
 		PMD_DRV_LOG(ERR, "Failed to switch RX queue %u on",
 			    rx_queue_id);
-	else
+	} else {
 		dev->data->rx_queue_state[rx_queue_id] =
 			RTE_ETH_QUEUE_STATE_STARTED;
+	}
 
 	return err;
 }
-- 
2.30.1.windows.1