From 8419d2eafe89d96cc9e5212dd9effa241ae391bc Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 22 Oct 2008 19:41:31 +0200 Subject: netfilter: restore lost ifdef guarding defrag exception netfilter: restore lost #ifdef guarding defrag exception Upstream commit 38f7ac3eb: Nir Tzachar reported a warning when sending fragments over loopback with NAT: [ 6658.338121] WARNING: at net/ipv4/netfilter/nf_nat_standalone.c:89 nf_nat_fn+0x33/0x155() The reason is that defragmentation is skipped for already tracked connections. This is wrong in combination with NAT and ip_conntrack actually had some ifdefs to avoid this behaviour when NAT is compiled in. The entire "optimization" may seem a bit silly, for now simply restoring the lost #ifdef is the easiest solution until we can come up with something better. Signed-off-by: Patrick McHardy Signed-off-by: Greg Kroah-Hartman --- net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index 50ad6efc5fd5..4618ea04ab33 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -138,10 +138,12 @@ static unsigned int ipv4_conntrack_defrag(unsigned int hooknum, const struct net_device *out, int (*okfn)(struct sk_buff *)) { +#if !defined(CONFIG_NF_NAT) && !defined(CONFIG_NF_NAT_MODULE) /* Previously seen (loopback)? Ignore. Do this before fragment check. */ if (skb->nfct) return NF_ACCEPT; +#endif /* Gather fragments. */ if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) { -- cgit v1.2.3