path: root/net
diff options
authorPatrick McHardy <>2005-04-25 12:01:07 -0700
committerDavid S. Miller <>2005-04-25 12:01:07 -0700
commitb31e5b1bb53b99dfd5e890aa07e943aff114ae1c (patch)
tree081d0f1223db0f7cda1fdaa3058ed4fefb28d9fc /net
parentf649a3bfd1b0ad8872312ed1c223d69b74406e1f (diff)
[NETFILTER]: Drop conntrack reference when packet leaves IP
In the event a raw socket is created for sending purposes only, the creator never bothers to check the socket's receive queue. But we continue to add skbs to its queue until it fills up. Unfortunately, if ip_conntrack is loaded on the box, each skb we add to the queue potentially holds a reference to a conntrack. If the user attempts to unload ip_conntrack, we will spin around forever since the queued skbs are pinned. Signed-off-by: Patrick McHardy <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'net')
2 files changed, 2 insertions, 7 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 30ab7b6ab761..38f69532a029 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -195,6 +195,8 @@ static inline int ip_finish_output2(struct sk_buff *skb)
+ nf_reset(skb);
if (hh) {
int hh_alen;
diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c
index 0c29ccf62a89..46ca45f74d85 100644
--- a/net/ipv4/netfilter/ip_conntrack_standalone.c
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -431,13 +431,6 @@ static unsigned int ip_conntrack_defrag(unsigned int hooknum,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
-#if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
- /* Previously seen (loopback)? Ignore. Do this before
- fragment check. */
- if ((*pskb)->nfct)
- return NF_ACCEPT;
/* Gather fragments. */
if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
*pskb = ip_ct_gather_frags(*pskb,