Re: [PATCH V1] block: Fix null pointer dereference issue on struct io_cq

[Yu Kuai]

Hi,

在 2023/05/30 21:15, Pradeep Pragallapati 写道:
> Hi,
>
> On 5/22/2023 11:49 AM, Pradeep Pragallapati wrote:
> > On 5/18/2023 6:14 PM, Yu Kuai wrote:
> > > Hi,
> > >
> > > 在 2023/05/18 20:16, Yu Kuai 写道:
> > >
> > > > @@ -173,18 +171,17 @@ void ioc_clear_queue(struct request_queue *q)
> > > >   {
> > > >          LIST_HEAD(icq_list);
> > > >
> > > > +       rcu_read_lock();
> > >
> > > Sorry that I realized this is still not enough, following list_empty()
> > > and list_entry() can still concurrent with list_del(). Please try the
> > > following patch:
> > sure will try and update the results.
>
>
> At least for 80+hrs of testing, i didn't see the issue reproduced. seems 
> like it is helping my case.

Thanks for the test, I'll send a patch soon.

Kuai