From 0d6b425a3773c3445b0f51b2f333821beaacb619 Mon Sep 17 00:00:00 2001 From: Kejian Yan Date: Tue, 22 Mar 2016 16:06:22 +0800 Subject: [PATCH] net: hns: bug fix about ping6 The current upstreaming code fails to ping other IPv6 net device, because the enet receives the multicast packets with the src mac addr which is the same as its mac addr. These packets need to be dropped. Signed-off-by: Kejian Yan Signed-off-by: Yisen Zhuang Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns/hns_enet.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 3f77ff77abbc..ef84bd72e3ca 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -564,6 +564,7 @@ static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data, struct sk_buff *skb; struct hnae_desc *desc; struct hnae_desc_cb *desc_cb; + struct ethhdr *eh; unsigned char *va; int bnum, length, i; int pull_len; @@ -670,6 +671,14 @@ out_bnum_err: return -EFAULT; } + /* filter out multicast pkt with the same src mac as this port */ + eh = eth_hdr(skb); + if (unlikely(is_multicast_ether_addr(eh->h_dest) && + ether_addr_equal(ndev->dev_addr, eh->h_source))) { + dev_kfree_skb_any(skb); + return -EFAULT; + } + ring->stats.rx_pkts++; ring->stats.rx_bytes += skb->len; -- 2.39.5