netdev - [PATCH net] net: hns: fix return value check in __lb_other

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Message-ID: <1608892525-21384-1-git-send-email-wangyunjian@huawei.com>
Date:   Fri, 25 Dec 2020 18:35:25 +0800
From:   wangyunjian <wangyunjian@...wei.com>
To:     <netdev@...r.kernel.org>
CC:     <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>,
        <jerry.lilijun@...wei.com>, <xudingke@...wei.com>,
        Yunjian Wang <wangyunjian@...wei.com>
Subject: [PATCH net] net: hns: fix return value check in __lb_other_process()

From: Yunjian Wang <wangyunjian@...wei.com>

The function skb_copy() could return NULL, the return value
need to be checked.

Fixes: b5996f11ea54 ("net: add Hisilicon Network Subsystem basic ethernet support")
Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
index 7165da0ee9aa..ad18f0e20a23 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
@@ -415,6 +415,10 @@ static void __lb_other_process(struct hns_nic_ring_data *ring_data,
 	/* for mutl buffer*/
 	new_skb = skb_copy(skb, GFP_ATOMIC);
 	dev_kfree_skb_any(skb);
+	if (!new_skb) {
+		ndev->stats.rx_dropped++;
+		return;
+	}
 	skb = new_skb;
 
 	check_ok = 0;
-- 
2.23.0