netfilter: fix wrong byte order in nf_ct_seqadj_set internal information
authorPhil Oester <kernel@linuxace.com>
Sun, 17 Nov 2013 04:37:46 +0000 (20:37 -0800)
committerPablo Neira Ayuso <pablo@netfilter.org>
Mon, 18 Nov 2013 11:53:40 +0000 (12:53 +0100)
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>
net/netfilter/nf_conntrack_seqadj.c

index 5f9bfd060deac302955f91dce75a3a86962a14d5..17c1bcb182c6b58a782744e23bfe671de160bf92 100644 (file)
@@ -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;
        }