1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index db10075dd88e..de9da21113a1 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -121,7 +121,9 @@ static unsigned int ipv4_confirm(unsigned int hooknum,
                 return ret;
         }
 
-        if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) {
+        /* adjust seqs for loopback traffic only in outgoing direction */
+        if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) &&
+            !nf_is_loopback_packet(skb)) {
                 typeof(nf_nat_seq_adjust_hook) seq_adjust;
 
                 seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook);