netdev - [PATCH net-next] net: mpls: Update lfib_nlmsg

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Date:   Tue, 28 Mar 2017 15:19:49 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH net-next] net: mpls: Update lfib_nlmsg_size to skip deleted nexthops

A recent commit skips nexthops in a route if the device has been
deleted. Update lfib_nlmsg_size accordingly.

Reported-by: Roopa Prabhu <roopa@...ulusnetworks.com>
Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
 net/mpls/af_mpls.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 74755920c689..0d08229c98c9 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1876,6 +1876,8 @@ static inline size_t lfib_nlmsg_size(struct mpls_route *rt)
 		size_t nhsize = 0;
 
 		for_nexthops(rt) {
+			if (!rtnl_dereference(nh->nh_dev))
+				continue;
 			nhsize += nla_total_size(sizeof(struct rtnexthop));
 			/* RTA_VIA */
 			if (nh->nh_via_table != MPLS_NEIGH_TABLE_UNSPEC)
-- 
2.1.4