Commit 57767e78 authored by Cong Wang's avatar Cong Wang Committed by David S. Miller
Browse files

cls_matchall: use tcf_exts_get_net() before call_rcu()



Hold netns refcnt before call_rcu() and release it after
the tcf_exts_destroy() is done.

Cc: Lucas Bates <lucasb@mojatatu.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d5f984f5
......@@ -44,13 +44,19 @@ static int mall_init(struct tcf_proto *tp)
return 0;
}
static void __mall_destroy(struct cls_mall_head *head)
{
tcf_exts_destroy(&head->exts);
tcf_exts_put_net(&head->exts);
kfree(head);
}
static void mall_destroy_work(struct work_struct *work)
{
struct cls_mall_head *head = container_of(work, struct cls_mall_head,
work);
rtnl_lock();
tcf_exts_destroy(&head->exts);
kfree(head);
__mall_destroy(head);
rtnl_unlock();
}
......@@ -109,7 +115,10 @@ static void mall_destroy(struct tcf_proto *tp)
if (tc_should_offload(dev, head->flags))
mall_destroy_hw_filter(tp, head, (unsigned long) head);
call_rcu(&head->rcu, mall_destroy_rcu);
if (tcf_exts_get_net(&head->exts))
call_rcu(&head->rcu, mall_destroy_rcu);
else
__mall_destroy(head);
}
static void *mall_get(struct tcf_proto *tp, u32 handle)
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment