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authorPedro Tammela <pctammela@mojatatu.com>2023-12-01 20:50:13 +0300
committerPaolo Abeni <pabeni@redhat.com>2023-12-05 13:15:08 +0300
commita0e947c9ccffe47d45aca793d9e7fe4f4494e381 (patch)
tree2a5d782e7e335376c52e696cd145314ae87903f0 /net/sched/act_api.c
parent3872347e0a16876279bb21642e03842f283f0e38 (diff)
downloadlinux-a0e947c9ccffe47d45aca793d9e7fe4f4494e381.tar.xz
net/sched: act_api: avoid non-contiguous action array
In tcf_action_add, when putting the reference for the bound actions it assigns NULLs to just created actions passing a non contiguous array to tcf_action_put_many. Refactor the code so the actions array is always contiguous. Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/sched/act_api.c')
-rw-r--r--net/sched/act_api.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 05aae374c159..2e948e5992b6 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1135,18 +1135,29 @@ static int tcf_action_put(struct tc_action *p)
return __tcf_action_put(p, false);
}
-/* Put all actions in this array, skip those NULL's. */
static void tcf_action_put_many(struct tc_action *actions[])
{
+ struct tc_action *a;
int i;
- for (i = 0; i < TCA_ACT_MAX_PRIO; i++) {
- struct tc_action *a = actions[i];
- const struct tc_action_ops *ops;
+ tcf_act_for_each_action(i, a, actions) {
+ const struct tc_action_ops *ops = a->ops;
+ if (tcf_action_put(a))
+ module_put(ops->owner);
+ }
+}
- if (!a)
+static void tca_put_bound_many(struct tc_action *actions[], int init_res[])
+{
+ struct tc_action *a;
+ int i;
+
+ tcf_act_for_each_action(i, a, actions) {
+ const struct tc_action_ops *ops = a->ops;
+
+ if (init_res[i] == ACT_P_CREATED)
continue;
- ops = a->ops;
+
if (tcf_action_put(a))
module_put(ops->owner);
}
@@ -1975,7 +1986,7 @@ static int tcf_action_add(struct net *net, struct nlattr *nla,
struct netlink_ext_ack *extack)
{
size_t attr_size = 0;
- int loop, ret, i;
+ int loop, ret;
struct tc_action *actions[TCA_ACT_MAX_PRIO] = {};
int init_res[TCA_ACT_MAX_PRIO] = {};
@@ -1988,13 +1999,11 @@ static int tcf_action_add(struct net *net, struct nlattr *nla,
if (ret < 0)
return ret;
+
ret = tcf_add_notify(net, n, actions, portid, attr_size, extack);
- /* only put existing actions */
- for (i = 0; i < TCA_ACT_MAX_PRIO; i++)
- if (init_res[i] == ACT_P_CREATED)
- actions[i] = NULL;
- tcf_action_put_many(actions);
+ /* only put bound actions */
+ tca_put_bound_many(actions, init_res);
return ret;
}