netfilter: fix wrong byte order in nf_ct_seqadj_set internal information

In commit 41d73ec053d2, sequence number adjustments were moved to a
separate file. Unfortunately, the sequence numbers that are stored
in the nf_ct_seqadj structure are expressed in host byte order. The
necessary ntohl call was removed when the call to adjust_tcp_sequence
was collapsed into nf_ct_seqadj_set. This broke the FTP NAT helper.
Fix it by adding back the byte order conversions.

Reported-by: Dawid Stawiarski <dawid.stawiarski@netart.pl>
Signed-off-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/netfilter/nf_conntrack_seqadj.c b/net/netfilter/nf_conntrack_seqadj.c
index 5f9bfd060dea..17c1bcb182c6 100644
--- a/net/netfilter/nf_conntrack_seqadj.c
+++ b/net/netfilter/nf_conntrack_seqadj.c
@@ -41,8 +41,8 @@ int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
         spin_lock_bh(&ct->lock);
         this_way = &seqadj->seq[dir];
         if (this_way->offset_before == this_way->offset_after ||
-            before(this_way->correction_pos, seq)) {
-                this_way->correction_pos = seq;
+            before(this_way->correction_pos, ntohl(seq))) {
+                this_way->correction_pos = ntohl(seq);
                 this_way->offset_before  = this_way->offset_after;
                 this_way->offset_after  += off;
         }