From b31e5b1bb53b99dfd5e890aa07e943aff114ae1c Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Mon, 25 Apr 2005 12:01:07 -0700 Subject: [PATCH] [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 --- net/ipv4/ip_output.c | 2 ++ net/ipv4/netfilter/ip_conntrack_standalone.c | 7 ------- 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_debug_ip_finish_output2(skb); #endif /*CONFIG_NETFILTER_DEBUG*/ + 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; -#endif - /* Gather fragments. */ if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) { *pskb = ip_ct_gather_frags(*pskb,