From: Madhu Koriginja madhu.koriginja@nxp.com
[ Upstream commit b0e214d212030fe497d4d150bb3474e50ad5d093 ]
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@nxp.com Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Sasha Levin sashal@kernel.org --- 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 b9d7c3dd1cb39..c0fd8f5f3b94e 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -783,6 +783,7 @@ 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 e1ebf5e42ebe9..d94041bb42872 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 4fc511bdf176c..f44b99f7ecdcc 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -193,10 +193,8 @@ 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(); @@ -387,6 +385,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb) kfree_skb(skb); 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 a52a4f12f1467..e4da7267ed4bd 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1721,6 +1721,8 @@ 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 a675acfb901d1..c519f21632656 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;