patches for DPDK stable branches
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From: wangyunjian <wangyunjian@huawei.com>
To: <dev@dpdk.org>
Cc: <longli@microsoft.com>, <sthemmin@microsoft.com>,
	<kys@microsoft.com>, <haiyangz@microsoft.com>,
	<jerry.lilijun@huawei.com>, <xudingke@huawei.com>,
	Yunjian Wang <wangyunjian@huawei.com>, <stable@dpdk.org>
Subject: [dpdk-stable] [dpdk-dev] [PATCH v2] net/netvsc: fix txq leak in error path
Date: Wed, 7 Oct 2020 10:06:25 +0800
Message-ID: <1602036385-10760-1-git-send-email-wangyunjian@huawei.com> (raw)
In-Reply-To: <bbe208ba281538f00662908f8e48cfb12c9fd850.1601369660.git.wangyunjian@huawei.com>

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>
---
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


  parent reply	other threads:[~2020-10-07  2:07 UTC|newest]

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

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