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authorWANG Cong <xiyou.wangcong@gmail.com>2016-08-13 22:35:01 -0700
committerDavid S. Miller <davem@davemloft.net>2016-08-17 19:27:51 -0400
commit0852e455238f8550fa92b1e40355eb2c6805787e (patch)
tree516e10d249bd34a6eaf587ca9040ca6599a62029
parent22dc13c837c33207548c8ee5116b64e2930a6e23 (diff)
net_sched: unify the init logic for act_police
Jamal reported a crash when we create a police action with a specific index, this is because the init logic is not correct, we should always create one for this case. Just unify the logic with other tc actions. Fixes: a03e6fe56971 ("act_police: fix a crash during removal") Reported-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/sched/act_police.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index b3c7e975fc9e..259352d978df 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -125,6 +125,7 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
struct tcf_police *police;
struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
struct tc_action_net *tn = net_generic(net, police_net_id);
+ bool exists = false;
int size;
if (nla == NULL)
@@ -139,24 +140,24 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
size = nla_len(tb[TCA_POLICE_TBF]);
if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
return -EINVAL;
+
parm = nla_data(tb[TCA_POLICE_TBF]);
+ exists = tcf_hash_check(tn, parm->index, a, bind);
+ if (exists && bind)
+ return 0;
- if (parm->index) {
- if (tcf_hash_check(tn, parm->index, a, bind)) {
- if (ovr)
- goto override;
- /* not replacing */
- return -EEXIST;
- }
- } else {
+ if (!exists) {
ret = tcf_hash_create(tn, parm->index, NULL, a,
&act_police_ops, bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;
+ } else {
+ tcf_hash_release(*a, bind);
+ if (!ovr)
+ return -EEXIST;
}
-override:
police = to_police(*a);
if (parm->rate.rate) {
err = -ENOMEM;