Commit 9d6acb3b authored Mar 01, 2017 by WANG Cong Committed by David S. Miller Mar 02, 2017

ipv6: ignore null_entry in inet6_rtm_getroute() too



Like commit 1f17e2f2 ("net: ipv6: ignore null_entry on route dumps"),
we need to ignore null entry in inet6_rtm_getroute() too.

Return -ENETUNREACH here to sync with IPv4 behavior, as suggested by David.

Fixes: a1a22c12 ("net: ipv6: Keep nexthop of multipath route on admin down")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent be12502e

net/ipv6/route.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -3632,6 +3632,12 @@ static int inet6_rtm_getroute(struct sk_buff in_skb, struct nlmsghdr nlh)
		rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6);
		}

		if (rt == net->ipv6.ip6_null_entry) {
		err = rt->dst.error;
		ip6_rt_put(rt);
		goto errout;
		}

		skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
		if (!skb) {
		ip6_rt_put(rt);