From: Dongxu Liu <liudong...@huawei.com> Date: Tue, 20 Aug 2019 23:19:05 +0800
> @@ -800,8 +800,11 @@ static int arp_process(struct net *net, struct sock *sk, > struct sk_buff *skb) > iptunnel_metadata_reply(skb_metadata_dst(skb), > GFP_ATOMIC); > > - /* Special case: IPv4 duplicate address detection packet (RFC2131) */ > - if (sip == 0) { > +/* Special case: IPv4 duplicate address detection packet (RFC2131). > + * Linux usually sends zero to detect duplication, and windows may > + * send a same ip (not zero, sip equal to tip) to do this detection. > + */ > + if (sip == 0 || sip == tip) { Regardless of whether this is a valid change or not, you've unindented the comment which is completely inappropriate.