At 2017-08-10 02:18:44, "Cong Wang" wrote:
>On Tue, Aug 8, 2017 at 10:13 PM, Gao Feng wrote:
>> Maybe I didn't show my explanation clearly.
>> I think it won't happen as I mentioned in the last email.
>> Because the pptp_release invokes the synchronize_rcu to make sure it, and
>> actually there
On Tue, Aug 8, 2017 at 10:13 PM, Gao Feng wrote:
> Maybe I didn't show my explanation clearly.
> I think it won't happen as I mentioned in the last email.
> Because the pptp_release invokes the synchronize_rcu to make sure it, and
> actually there is no one which would invoke del_chan except pptp
On Mon, Aug 7, 2017 at 6:10 PM, Gao Feng wrote:
>
> Sorry, I don't get you clearly. Why the sock_hold() isn't helpful?
I already told you, the dereference happends before sock_hold().
sock = rcu_dereference(callid_sock[call_id]);
if (sock) {
opt = &sock->proto.ppt
