net/sched: act_ct: Fix leak of ct zone template on replace

Currently, on replace, the previous action instance params
is swapped with a newly allocated params. The old params is
only freed (via kfree_rcu), without releasing the allocated
ct zone template related to it.

Call tcf_ct_params_free (via call_rcu) for the old params,
so it will release it.

Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index f685c0d..41114b4 100644 (file)
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -739,7 +739,7 @@ static int tcf_ct_init(struct net *net, struct nlattr *nla,
        if (goto_ch)
                tcf_chain_put_by_act(goto_ch);
        if (params)
-               kfree_rcu(params, rcu);
+               call_rcu(&params->rcu, tcf_ct_params_free);
        if (res == ACT_P_CREATED)
                tcf_idr_insert(tn, *a);