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From: Long Li <longli@microsoft.com>
To: wangyunjian <wangyunjian@huawei.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: Stephen Hemminger <sthemmin@microsoft.com>,
	KY Srinivasan <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	"jerry.lilijun@huawei.com" <jerry.lilijun@huawei.com>,
	"xudingke@huawei.com" <xudingke@huawei.com>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2] net/netvsc: fix txq leak in error path
Date: Fri, 9 Oct 2020 03:53:30 +0000
Message-ID: <BYAPR21MB11596B362F3172D09C34BBD9CE080@BYAPR21MB1159.namprd21.prod.outlook.com> (raw)
In-Reply-To: <1602036385-10760-1-git-send-email-wangyunjian@huawei.com>

>Subject: [dpdk-dev] [PATCH v2] net/netvsc: fix txq leak in error path
>
>From: Yunjian Wang <wangyunjian@huawei.com>
>
>In hn_dev_tx_queue_setup() allocated memory for txq, we don't free it
>when error happens and it will lead to memory leak.
>
>We can check for tx_free_thresh at the beginning of the function to fix it,
>before calling txq = rte_zmalloc_socket().
>
>Fixes: cc0251813277 ("net/netvsc: split send buffers from Tx descriptors")
>Cc: stable@dpdk.org
>
>Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>

Acked-by: Long Li <longli@microsoft.com>
>---
>v2:
>  fix code styles suggested by Long Li
>---
> drivers/net/netvsc/hn_rxtx.c | 19 +++++++++----------
> 1 file changed, 9 insertions(+), 10 deletions(-)
>
>diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
>index 65f1abae5..5d59db513 100644
>--- a/drivers/net/netvsc/hn_rxtx.c
>+++ b/drivers/net/netvsc/hn_rxtx.c
>@@ -252,16 +252,6 @@ hn_dev_tx_queue_setup(struct rte_eth_dev *dev,
>
> 	PMD_INIT_FUNC_TRACE();
>
>-	txq = rte_zmalloc_socket("HN_TXQ", sizeof(*txq),
>RTE_CACHE_LINE_SIZE,
>-				 socket_id);
>-	if (!txq)
>-		return -ENOMEM;
>-
>-	txq->hv = hv;
>-	txq->chan = hv->channels[queue_idx];
>-	txq->port_id = dev->data->port_id;
>-	txq->queue_id = queue_idx;
>-
> 	tx_free_thresh = tx_conf->tx_free_thresh;
> 	if (tx_free_thresh == 0)
> 		tx_free_thresh = RTE_MIN(nb_desc / 4, @@ -276,6 +266,15
>@@ hn_dev_tx_queue_setup(struct rte_eth_dev *dev,
> 		return -EINVAL;
> 	}
>
>+	txq = rte_zmalloc_socket("HN_TXQ", sizeof(*txq),
>RTE_CACHE_LINE_SIZE,
>+				 socket_id);
>+	if (!txq)
>+		return -ENOMEM;
>+
>+	txq->hv = hv;
>+	txq->chan = hv->channels[queue_idx];
>+	txq->port_id = dev->data->port_id;
>+	txq->queue_id = queue_idx;
> 	txq->free_thresh = tx_free_thresh;
>
> 	snprintf(name, sizeof(name),
>--
>2.23.0


  reply	other threads:[~2020-10-09  3:53 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29 13:44 [dpdk-dev] [PATCH] " wangyunjian
2020-09-30 22:27 ` Long Li
2020-10-02 14:25   ` Yunjian Wang
2020-10-07  2:06 ` [dpdk-dev] [PATCH v2] " wangyunjian
2020-10-09  3:53   ` Long Li [this message]
2020-10-09 11:36     ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit

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