[PATCH net-next 10/12] net: hns3: fix for skb leak when doing selftest
From: Huazhong Tan <hidden>
Date: 2019-06-13 15:49:52
Also in:
lkml
Subsystem:
hisilicon network subsystem 3 driver (hns3), hisilicon network subsystem driver, networking drivers, the rest · Maintainers:
Jian Shen, Jijie Shao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Yunsheng Lin <redacted>
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 <redacted>
Signed-off-by: Peng Li <redacted>
Signed-off-by: Huazhong Tan <redacted>
---
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