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ipv6: ignore null_entry in inet6_rtm_getroute() too

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Like commit 1f17e2f2c8 ("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: a1a22c1206 ("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>
This commit is contained in:
WANG Cong 2017-03-01 20:48:39 -08:00 committed by David S. Miller
parent be12502e2e
commit 9d6acb3bc9
1 changed files with 6 additions and 0 deletions
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6
net/ipv6/route.c
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@ -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);