On Tue, Jun 17, 2025 at 09:00:07AM +0200, Eric Woudstra wrote: > When a flow is marked for teardown, because the destination is not valid > any more, the software fastpath may still be in effect and traffic is > still send to the wrong destination. Change the ip/ipv6 hooks to not use > the software fastpath for a flow that is marked to be teared down and let > the packet continue along the normal path. > > Signed-off-by: Eric Woudstra <ericwouds@xxxxxxxxx> > --- > net/netfilter/nf_flow_table_ip.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c > index 64a12b9668e7..f9bf2b466ca8 100644 > --- a/net/netfilter/nf_flow_table_ip.c > +++ b/net/netfilter/nf_flow_table_ip.c > @@ -542,6 +542,9 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, > dir = tuplehash->tuple.dir; > flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); > > + if (test_bit(NF_FLOW_TEARDOWN, &flow->flags)) > + return NF_ACCEPT; nf_flow_offload_lookup() already checks for this bit, I don't a benefit from this re-check.
