diff options
| author | Alin Nastac <alin.nastac@gmail.com> | 2018-11-21 16:00:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-17 11:28:51 +0300 |
| commit | 97f048033a07b199b98d5e8f10f1022f10d42ed4 (patch) | |
| tree | f143aed6394d33de308db712518efee616426a7d | |
| parent | f47b8824a83057e9f63d39df86332ffeb703311f (diff) | |
| download | linux-97f048033a07b199b98d5e8f10f1022f10d42ed4.tar.xz | |
netfilter: ipv6: Preserve link scope traffic original oif
[ Upstream commit 508b09046c0f21678652fb66fd1e9959d55591d2 ]
When ip6_route_me_harder is invoked, it resets outgoing interface of:
- link-local scoped packets sent by neighbor discovery
- multicast packets sent by MLD host
- multicast packets send by MLD proxy daemon that sets outgoing
interface through IPV6_PKTINFO ipi6_ifindex
Link-local and multicast packets must keep their original oif after
ip6_route_me_harder is called.
Signed-off-by: Alin Nastac <alin.nastac@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/ipv6/netfilter.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index 9bf260459f83..1f8b1a433b5d 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -25,7 +25,8 @@ int ip6_route_me_harder(struct net *net, struct sk_buff *skb) unsigned int hh_len; struct dst_entry *dst; struct flowi6 fl6 = { - .flowi6_oif = sk ? sk->sk_bound_dev_if : 0, + .flowi6_oif = sk && sk->sk_bound_dev_if ? sk->sk_bound_dev_if : + rt6_need_strict(&iph->daddr) ? skb_dst(skb)->dev->ifindex : 0, .flowi6_mark = skb->mark, .flowi6_uid = sock_net_uid(net, sk), .daddr = iph->daddr, |