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net: sched: call tcf_ct_params_free to free params in tcf_ct_init

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This patch is to make the err path simple by calling tcf_ct_params_free(),
so that it won't cause problems when more members are added into param and
need freeing on the err path.

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Xin Long 2022-11-06 15:34:16 -05:00 committed by Paolo Abeni
parent f96cba2eb9
commit 1913894100
1 changed files with 18 additions and 17 deletions
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35
net/sched/act_ct.c
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@ -345,11 +345,9 @@ static void tcf_ct_flow_table_cleanup_work(struct work_struct *work)
module_put(THIS_MODULE);
}
static void tcf_ct_flow_table_put(struct tcf_ct_params *params)
static void tcf_ct_flow_table_put(struct tcf_ct_flow_table *ct_ft)
{
struct tcf_ct_flow_table *ct_ft = params->ct_ft;
if (refcount_dec_and_test(&params->ct_ft->ref)) {
if (refcount_dec_and_test(&ct_ft->ref)) {
rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work);
queue_rcu_work(act_ct_wq, &ct_ft->rwork);
@ -832,18 +830,23 @@ out_free:
return err;
}
static void tcf_ct_params_free(struct rcu_head *head)
static void tcf_ct_params_free(struct tcf_ct_params *params)
{
struct tcf_ct_params *params = container_of(head,
struct tcf_ct_params, rcu);
tcf_ct_flow_table_put(params);
if (params->ct_ft)
tcf_ct_flow_table_put(params->ct_ft);
if (params->tmpl)
nf_ct_put(params->tmpl);
kfree(params);
}
static void tcf_ct_params_free_rcu(struct rcu_head *head)
{
struct tcf_ct_params *params;
params = container_of(head, struct tcf_ct_params, rcu);
tcf_ct_params_free(params);
}
#if IS_ENABLED(CONFIG_NF_NAT)
/* Modelled after nf_nat_ipv[46]_fn().
* range is only used for new, uninitialized NAT state.
@ -1390,7 +1393,7 @@ static int tcf_ct_init(struct net *net, struct nlattr *nla,
err = tcf_ct_flow_table_get(net, params);
if (err)
goto cleanup_params;
goto cleanup;
spin_lock_bh(&c->tcf_lock);
goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
@ -1401,17 +1404,15 @@ static int tcf_ct_init(struct net *net, struct nlattr *nla,
if (goto_ch)
tcf_chain_put_by_act(goto_ch);
if (params)
call_rcu(&params->rcu, tcf_ct_params_free);
call_rcu(&params->rcu, tcf_ct_params_free_rcu);
return res;
cleanup_params:
if (params->tmpl)
nf_ct_put(params->tmpl);
cleanup:
if (goto_ch)
tcf_chain_put_by_act(goto_ch);
kfree(params);
if (params)
tcf_ct_params_free(params);
tcf_idr_release(*a, bind);
return err;
}
@ -1423,7 +1424,7 @@ static void tcf_ct_cleanup(struct tc_action *a)
params = rcu_dereference_protected(c->params, 1);
if (params)
call_rcu(&params->rcu, tcf_ct_params_free);
call_rcu(&params->rcu, tcf_ct_params_free_rcu);
}
static int tcf_ct_dump_key_val(struct sk_buff *skb,