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[NETFILTER]: Keep conntrack reference until IPsec policy checks are done

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Keep the conntrack reference until policy checks have been performed for
IPsec NAT support. The reference needs to be dropped before a packet is
queued to avoid having the conntrack module unloadable.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-01-06 23:06:10 -08:00 committed by David S. Miller
parent 5c901daaea
commit b59c270104
6 changed files with 12 additions and 9 deletions
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1
net/dccp/ipv4.c
View File

@ -1099,6 +1099,7 @@ int dccp_v4_destroy_sock(struct sock *sk)
kfree_skb(sk->sk_send_head);
sk->sk_send_head = NULL;
}
nf_reset(skb);
/* Clean up a referenced DCCP bind bucket. */
if (inet_csk(sk)->icsk_bind_hash != NULL)

15
net/ipv4/ip_input.c
View File

@ -185,7 +185,6 @@ int ip_call_ra_chain(struct sk_buff *skb)
raw_rcv(last, skb2);
}
last = sk;
nf_reset(skb);
}
}
@ -204,10 +203,6 @@ static inline int ip_local_deliver_finish(struct sk_buff *skb)
__skb_pull(skb, ihl);
/* Free reference early: we don't need it any more, and it may
hold ip_conntrack module loaded indefinitely. */
nf_reset(skb);
/* Point into the IP datagram, just past the header. */
skb->h.raw = skb->data;
@ -232,10 +227,12 @@ static inline int ip_local_deliver_finish(struct sk_buff *skb)
if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) {
int ret;
if (!ipprot->no_policy &&
!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
kfree_skb(skb);
goto out;
if (!ipprot->no_policy) {
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
kfree_skb(skb);
goto out;
}
nf_reset(skb);
}
ret = ipprot->handler(skb);
if (ret < 0) {

1
net/ipv4/raw.c
View File

@ -255,6 +255,7 @@ int raw_rcv(struct sock *sk, struct sk_buff *skb)
kfree_skb(skb);
return NET_RX_DROP;
}
nf_reset(skb);
skb_push(skb, skb->data - skb->nh.raw);

1
net/ipv4/tcp_ipv4.c
View File

@ -1080,6 +1080,7 @@ process:
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
nf_reset(skb);
if (sk_filter(sk, skb, 0))
goto discard_and_relse;

2
net/ipv4/udp.c
View File

@ -989,6 +989,7 @@ static int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
kfree_skb(skb);
return -1;
}
nf_reset(skb);
if (up->encap_type) {
/*
@ -1149,6 +1150,7 @@ int udp_rcv(struct sk_buff *skb)
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
goto drop;
nf_reset(skb);
/* No socket. Drop packet silently, if checksum is wrong */
if (udp_checksum_complete(skb))

1
net/sctp/input.c
View File

@ -225,6 +225,7 @@ int sctp_rcv(struct sk_buff *skb)
if (!xfrm_policy_check(sk, XFRM_POLICY_IN, skb, family))
goto discard_release;
nf_reset(skb);
ret = sk_filter(sk, skb, 1);
if (ret)