From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Alin Nastac <alin.nastac@gmail.com>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Sasha Levin <sashal@kernel.org>,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 075/123] netfilter: ipv6: Preserve link scope traffic original oif
Date: Wed, 5 Dec 2018 04:35:07 -0500 [thread overview]
Message-ID: <20181205093555.5386-75-sashal@kernel.org> (raw)
In-Reply-To: <20181205093555.5386-1-sashal@kernel.org>
From: Alin Nastac <alin.nastac@gmail.com>
[ 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>
---
net/ipv6/netfilter.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 5ae8e1c51079..8b075f0bc351 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -24,7 +24,8 @@ 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,
--
2.17.1
next prev parent reply other threads:[~2018-12-05 9:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20181205093555.5386-1-sashal@kernel.org>
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 017/123] netfilter: nf_conncount: use spin_lock_bh instead of spin_lock Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 018/123] netfilter: nf_conncount: fix list_del corruption in conn_free Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 019/123] netfilter: nf_conncount: fix unexpected permanent node of list Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 020/123] netfilter: nf_tables: don't skip inactive chains during update Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 023/123] netfilter: xt_RATEEST: remove netns exit routine Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 024/123] netfilter: nf_tables: fix use-after-free when deleting compat expressions Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 042/123] netfilter: xt_hashlimit: fix a possible memory leak in htable_create() Sasha Levin
2018-12-05 9:34 ` [PATCH AUTOSEL 4.19 067/123] ipvs: call ip_vs_dst_notifier earlier than ipv6_dev_notf Sasha Levin
2018-12-05 9:35 ` Sasha Levin [this message]
2018-12-05 9:35 ` [PATCH AUTOSEL 4.19 077/123] netfilter: add missing error handling code for register functions Sasha Levin
2018-12-05 9:35 ` [PATCH AUTOSEL 4.19 078/123] netfilter: nat: fix double register in masquerade modules Sasha Levin
2018-12-05 9:35 ` [PATCH AUTOSEL 4.19 079/123] netfilter: nf_conncount: remove wrong condition check routine Sasha Levin
2018-12-05 9:35 ` [PATCH AUTOSEL 4.19 089/123] netfilter: nf_tables: deactivate expressions in rule replecement routine Sasha Levin
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