act_mirred: avoid calling tcf_hash_release() when binding

When we share an action within a filter, the bind refcnt
should increase, therefore we should not call tcf_hash_release().

Cc: Jamal Hadi Salim <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index a42a3b257226178eb5af04054a17813c04368613..268545050ddbd67245ead8394a82f44503657ea5 100644 (file)
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -98,6 +98,8 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
                        return ret;
                ret = ACT_P_CREATED;
        } else {
+               if (bind)
+                       return 0;
                if (!ovr) {
                        tcf_hash_release(a, bind);
                        return -EEXIST;