From 270a8a297f42ecff82060aaa53118361f09c1f7d Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Mon, 29 Apr 2019 11:54:56 +0200 Subject: [PATCH] netfilter: nft_flow_offload: add entry to flowtable after confirmation This is fixing flow offload for UDP traffic where packets only follow one single direction. The flow_offload_fixup_tcp() mechanism works fine in case that the offloaded entry remains in SYN_RECV state, given sequence tracking is reset and that conntrack handles syn+ack packets as a retransmission, ie. sES + synack => sIG for reply traffic. Fixes: a3c90f7a2323 ("netfilter: nf_tables: flow offload expression") Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_flow_offload.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c index 6e6b9ad..8968c7f 100644 --- a/net/netfilter/nft_flow_offload.c +++ b/net/netfilter/nft_flow_offload.c @@ -94,8 +94,7 @@ static void nft_flow_offload_eval(const struct nft_expr *expr, if (help) goto out; - if (ctinfo == IP_CT_NEW || - ctinfo == IP_CT_RELATED) + if (!nf_ct_is_confirmed(ct)) goto out; if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status)) -- 2.7.4