From: Madhu Koriginja <madhu.koriginja@xxxxxxx>
Keep the conntrack reference until policy checks have been performed for
IPsec V6 NAT support, just like ipv4.
The reference needs to be dropped before a packet is
queued to avoid having the conntrack module unloadable.
Fixes: 58a317f1061c ("netfilter: ipv6: add IPv6 NAT support")
Signed-off-by: Madhu Koriginja <madhu.koriginja@xxxxxxx>
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
net/dccp/ipv6.c | 1 +
net/ipv6/ip6_input.c | 14 ++++++--------
net/ipv6/raw.c | 5 ++---
net/ipv6/tcp_ipv6.c | 2 ++
net/ipv6/udp.c | 2 ++
5 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 47fb10834223..93c98990d726 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -784,6 +784,7 @@ static int dccp_v6_rcv(struct sk_buff *skb)
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
+ nf_reset_ct(skb);
return __sk_receive_skb(sk, skb, 1, dh->dccph_doff * 4,
refcounted) ? -1 : 0;
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index e1ebf5e42ebe..d94041bb4287 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -404,10 +404,6 @@ void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr,
/* Only do this once for first final protocol */
have_final = true;
- /* Free reference early: we don't need it any more,
- and it may hold ip_conntrack module loaded
- indefinitely. */
- nf_reset_ct(skb);
skb_postpull_rcsum(skb, skb_network_header(skb),
skb_network_header_len(skb));
@@ -430,10 +426,12 @@ void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr,
goto discard;
}
}
- if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
- !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- SKB_DR_SET(reason, XFRM_POLICY);
- goto discard;
+ if (!(ipprot->flags & INET6_PROTO_NOPOLICY)) {
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ SKB_DR_SET(reason, XFRM_POLICY);
+ goto discard;
+ }
+ nf_reset_ct(skb);
}
ret = INDIRECT_CALL_2(ipprot->handler, tcp_v6_rcv, udpv6_rcv,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 6ac2f2690c44..4ab62a9c5c8e 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -194,10 +194,8 @@ static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */
- if (clone) {
- nf_reset_ct(clone);
+ if (clone)
rawv6_rcv(sk, clone);
- }
}
}
rcu_read_unlock();
@@ -391,6 +389,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
kfree_skb_reason(skb, SKB_DROP_REASON_XFRM_POLICY);
return NET_RX_DROP;
}
+ nf_reset_ct(skb);
if (!rp->checksum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 35cf523c9efd..244cf86c4cbb 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1723,6 +1723,8 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb)
if (drop_reason)
goto discard_and_relse;
+ nf_reset_ct(skb);
+
if (tcp_filter(sk, skb)) {
drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
goto discard_and_relse;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index d350e57c4792..4caa70a1b871 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -704,6 +704,7 @@ static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
drop_reason = SKB_DROP_REASON_XFRM_POLICY;
goto drop;
}
+ nf_reset_ct(skb);
if (static_branch_unlikely(&udpv6_encap_needed_key) && up->encap_type) {
int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
@@ -1027,6 +1028,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
goto discard;
+ nf_reset_ct(skb);
if (udp_lib_checksum_complete(skb))
goto csum_error;
--
2.39.2
