diff mbox series

[5.4,027/155] net/sched: act_ct: Fix leak of ct zone template on replace

Message ID 20200331085421.444017394@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman March 31, 2020, 8:57 a.m. UTC 
From: Paul Blakey <paulb@mellanox.com>

[ Upstream commit dd2af10402684cb5840a127caec9e7cdcff6d167 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/act_ct.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -739,7 +739,7 @@  static int tcf_ct_init(struct net *net,
 	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);