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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 3/9] netfilter: bridge: set skb transport_header before entering NF_INET_PRE_ROUTING
Date: Thu, 21 Mar 2019 12:28:39 +0100
Message-ID: <20190321112845.10627-4-pablo@netfilter.org> (raw)
In-Reply-To: <20190321112845.10627-1-pablo@netfilter.org>

From: Xin Long <lucien.xin@gmail.com>

Since Commit 21d1196a35f5 ("ipv4: set transport header earlier"),
skb->transport_header has been always set before entering INET
netfilter. This patch is to set skb->transport_header for bridge
before entering INET netfilter by bridge-nf-call-iptables.

It also fixes an issue that sctp_error() couldn't compute a right
csum due to unset skb->transport_header.

Fixes: e6d8b64b34aa ("net: sctp: fix and consolidate SCTP checksumming code")
Reported-by: Li Shuang <shuali@redhat.com>
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/bridge/br_netfilter_hooks.c | 1 +
 net/bridge/br_netfilter_ipv6.c  | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 9d34de68571b..22afa566cbce 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -502,6 +502,7 @@ static unsigned int br_nf_pre_routing(void *priv,
 	nf_bridge->ipv4_daddr = ip_hdr(skb)->daddr;
 
 	skb->protocol = htons(ETH_P_IP);
+	skb->transport_header = skb->network_header + ip_hdr(skb)->ihl * 4;
 
 	NF_HOOK(NFPROTO_IPV4, NF_INET_PRE_ROUTING, state->net, state->sk, skb,
 		skb->dev, NULL,
diff --git a/net/bridge/br_netfilter_ipv6.c b/net/bridge/br_netfilter_ipv6.c
index 564710f88f93..e88d6641647b 100644
--- a/net/bridge/br_netfilter_ipv6.c
+++ b/net/bridge/br_netfilter_ipv6.c
@@ -235,6 +235,8 @@ unsigned int br_nf_pre_routing_ipv6(void *priv,
 	nf_bridge->ipv6_daddr = ipv6_hdr(skb)->daddr;
 
 	skb->protocol = htons(ETH_P_IPV6);
+	skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
+
 	NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->net, state->sk, skb,
 		skb->dev, NULL,
 		br_nf_pre_routing_finish_ipv6);
-- 
2.11.0


  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-21 11:28 [PATCH 0/9] Netfilter fixes for net Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 1/9] netfilter: nf_conntrack_sip: remove direct dependency on IPv6 Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 2/9] netfilter: nft_set_rbtree: check for inactive element after flag mismatch Pablo Neira Ayuso
2019-03-21 11:28 ` Pablo Neira Ayuso [this message]
2019-03-21 11:28 ` [PATCH 4/9] netfilter: fix NETFILTER_XT_TARGET_TEE dependencies Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 5/9] netfilter: ip6t_srh: fix NULL pointer dereferences Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 6/9] netfilter: nf_tables: bogus EBUSY in helper removal from transaction Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 7/9] netfilter: nft_redir: fix module autoload with ip4 Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 8/9] netfilter: nf_flowtable: remove duplicated transition in diagram Pablo Neira Ayuso
2019-03-21 11:28 ` [PATCH 9/9] netfilter: nf_tables: add missing ->release_ops() in error path of newrule() Pablo Neira Ayuso
2019-03-21 17:07 ` [PATCH 0/9] Netfilter fixes for net David Miller

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