From: Paul Blakey paulb@nvidia.com
commit 2f131de361f6d0eaff17db26efdb844c178432f8 upstream.
Flow table lookup is skipped if packet either went through ct clear action (which set the IP_CT_UNTRACKED flag on the packet), or while switching zones and there is already a connection associated with the packet. This will result in no SW offload of the connection, and the and connection not being removed from flow table with TCP teardown (fin/rst packet).
To fix the above, remove these unneccary checks in flow table lookup.
Fixes: 46475bb20f4b ("net/sched: act_ct: Software offload of established flows") Signed-off-by: Paul Blakey paulb@nvidia.com Acked-by: Marcelo Ricardo Leitner marcelo.leitner@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sched/act_ct.c | 5 ----- 1 file changed, 5 deletions(-)
--- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -516,11 +516,6 @@ static bool tcf_ct_flow_table_lookup(str struct nf_conn *ct; u8 dir;
- /* Previously seen or loopback */ - ct = nf_ct_get(skb, &ctinfo); - if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED) - return false; - switch (family) { case NFPROTO_IPV4: if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph))