!12787 net: hisilicon: Fix potential use-after-free in hisi_femac_rx()

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Jian <liujian56@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/JZH72T4PZCYAGJRLBAA2JTZ6ZHOSBK27/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAYRFL 
 
Link:https://gitee.com/openeuler/kernel/pulls/12787 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com> 
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hisi_femac.c

@@ -283,7 +283,7 @@ static int hisi_femac_rx(struct net_device *dev, int limit)
 		skb->protocol = eth_type_trans(skb, dev);
 		napi_gro_receive(&priv->napi, skb);
 		dev->stats.rx_packets++;
-		dev->stats.rx_bytes += skb->len;
+		dev->stats.rx_bytes += len;
 next:
 		pos = (pos + 1) % rxq->num;
 		if (rx_pkts_num >= limit)