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ipv6/route: Don't match on fc_nh_id if not set in ip6_route_del()

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If fc_nh_id isn't set, we shouldn't try to match against it. This
actually matters just for the RTF_CACHE below (where this case is
already handled): if iproute2 gets a route exception and tries to
delete it, it won't reference it by fc_nh_id, even if a nexthop
object might be associated to the originating route.

Fixes: 5b98324ebe ("ipv6: Allow routes to use nexthop objects")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefano Brivio 2019-06-21 17:45:25 +02:00 committed by David S. Miller
parent ef11209d42
commit 3401bfb163
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/route.c
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@ -3840,7 +3840,8 @@ static int ip6_route_del(struct fib6_config *cfg,
for_each_fib6_node_rt_rcu(fn) {
struct fib6_nh *nh;
if (rt->nh && rt->nh->id != cfg->fc_nh_id)
if (rt->nh && cfg->fc_nh_id &&
rt->nh->id != cfg->fc_nh_id)
continue;
if (cfg->fc_flags & RTF_CACHE) {