From b21f89019399ff75d9c239010e38b840eb6e01e7 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Wed, 8 Oct 2008 11:35:03 +0200 Subject: [PATCH] netfilter: netns: fix {ip,6}_route_me_harder() in netns Take netns from skb->dst->dev. It should be safe because, they are called from LOCAL_OUT hook where dst is valid (though, I'm not exactly sure about IPVS and queueing packets to userspace). [Patrick: its safe everywhere since they already expect skb->dst to be set] Signed-off-by: Alexey Dobriyan Signed-off-by: Patrick McHardy --- net/ipv4/netfilter.c | 7 ++++--- net/ipv6/netfilter.c | 2 +- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c index 01671ad51ed3..6efdb70b3eb2 100644 --- a/net/ipv4/netfilter.c +++ b/net/ipv4/netfilter.c @@ -12,6 +12,7 @@ /* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type) { + struct net *net = dev_net(skb->dst->dev); const struct iphdr *iph = ip_hdr(skb); struct rtable *rt; struct flowi fl = {}; @@ -19,7 +20,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type) unsigned int hh_len; unsigned int type; - type = inet_addr_type(&init_net, iph->saddr); + type = inet_addr_type(net, iph->saddr); if (skb->sk && inet_sk(skb->sk)->transparent) type = RTN_LOCAL; if (addr_type == RTN_UNSPEC) @@ -36,7 +37,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type) fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0; fl.mark = skb->mark; fl.flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0; - if (ip_route_output_key(&init_net, &rt, &fl) != 0) + if (ip_route_output_key(net, &rt, &fl) != 0) return -1; /* Drop old route. */ @@ -46,7 +47,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type) /* non-local src, find valid iif to satisfy * rp-filter when calling ip_route_input. */ fl.nl_u.ip4_u.daddr = iph->saddr; - if (ip_route_output_key(&init_net, &rt, &fl) != 0) + if (ip_route_output_key(net, &rt, &fl) != 0) return -1; odst = skb->dst; diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index 8c6c5e71f210..4cb4844a3220 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -23,7 +23,7 @@ int ip6_route_me_harder(struct sk_buff *skb) .saddr = iph->saddr, } }, }; - dst = ip6_route_output(&init_net, skb->sk, &fl); + dst = ip6_route_output(dev_net(skb->dst->dev), skb->sk, &fl); #ifdef CONFIG_XFRM if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) && -- 2.20.1