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From: Huazhong Tan <tanhuazhong@huawei.com>
To: <davem@davemloft.net>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<salil.mehta@huawei.com>, <yisen.zhuang@huawei.com>,
	<linuxarm@huawei.com>, Yunsheng Lin <linyunsheng@huawei.com>,
	Peng Li <lipeng321@huawei.com>,
	Huazhong Tan <tanhuazhong@huawei.com>
Subject: [PATCH net-next 10/12] net: hns3: fix for skb leak when doing selftest
Date: Thu, 13 Jun 2019 17:12:30 +0800	[thread overview]
Message-ID: <1560417152-53050-11-git-send-email-tanhuazhong@huawei.com> (raw)
In-Reply-To: <1560417152-53050-1-git-send-email-tanhuazhong@huawei.com>

From: Yunsheng Lin <linyunsheng@huawei.com>

If hns3_nic_net_xmit does not return NETDEV_TX_BUSY when doing
a loopback selftest, the skb is not freed in hns3_clean_tx_ring
or hns3_nic_net_xmit, which causes skb not freed problem.

This patch fixes it by freeing skb when hns3_nic_net_xmit does
not return NETDEV_TX_OK.

Fixes: c39c4d98dc65 ("net: hns3: Add mac loopback selftest support in hns3 driver")

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 6ce724d..0998647 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -250,11 +250,13 @@ static int hns3_lp_run_test(struct net_device *ndev, enum hnae3_loop mode)
 
 		skb_get(skb);
 		tx_ret = hns3_nic_net_xmit(skb, ndev);
-		if (tx_ret == NETDEV_TX_OK)
+		if (tx_ret == NETDEV_TX_OK) {
 			good_cnt++;
-		else
+		} else {
+			kfree_skb(skb);
 			netdev_err(ndev, "hns3_lb_run_test xmit failed: %d\n",
 				   tx_ret);
+		}
 	}
 	if (good_cnt != HNS3_NIC_LB_TEST_PKT_NUM) {
 		ret_val = HNS3_NIC_LB_TEST_TX_CNT_ERR;
-- 
2.7.4


  parent reply	other threads:[~2019-06-13 15:50 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13  9:12 [PATCH net-next 00/12] net: hns3: some code optimizations & cleanups & bugfixes Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 01/12] net: hns3: delay setting of reset level for hw errors until slot_reset is called Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 02/12] net: hns3: fix avoid unnecessary resetting for the H/W errors which do not require reset Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 03/12] net: hns3: process H/W errors occurred before HNS dev initialization Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 04/12] net: hns3: add recovery for the H/W errors occurred before the " Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 05/12] net: hns3: some changes of MSI-X bits in PPU(RCB) Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 06/12] net: hns3: extract handling of mpf/pf msi-x errors into functions Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 07/12] net: hns3: clear restting state when initializing HW device Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 08/12] net: hns3: free irq when exit from abnormal branch Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 09/12] net: hns3: fix for dereferencing before null checking Huazhong Tan
2019-06-13  9:12 ` Huazhong Tan [this message]
2019-06-13  9:12 ` [PATCH net-next 11/12] net: hns3: delay ring buffer clearing during reset Huazhong Tan
2019-06-13  9:12 ` [PATCH net-next 12/12] net: hns3: some variable modification Huazhong Tan
2019-06-15  2:26 ` [PATCH net-next 00/12] net: hns3: some code optimizations & cleanups & bugfixes David Miller

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