[PATCH 4.19 28/77] net: hns: fix return value check in __lb_other_process()

[Greg Kroah-Hartman]

From: Yunjian Wang <wangyunj...@huawei.com>

[ Upstream commit 5ede3ada3da7f050519112b81badc058190b9f9f ]

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 <wangyunj...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/ethernet/hisilicon/hns/hns_ethtool.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
@@ -419,6 +419,10 @@ static void __lb_other_process(struct hn
        /* for mutl buffer*/
        new_skb = skb_copy(skb, GFP_ATOMIC);
        dev_kfree_skb_any(skb);
+       if (!new_skb) {
+               netdev_err(ndev, "skb alloc failed\n");
+               return;
+       }
        skb = new_skb;
 
        check_ok = 0;