Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter

[Mateusz Guzik]

On Sun, Mar 23, 2025 at 8:47 PM Oleg Nesterov <oleg@xxxxxxxxxx> wrote:
>
> On 03/23, syzbot wrote:
> >
> > Hello,
> >
> > syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> > INFO: task hung in netfs_unbuffered_write_iter
>
> OK, as expected.
>
> Dear syzbot, thank you.
>
> So far I think this is another problem revealed by aaec5a95d59615523db03dd5
> ("pipe_read: don't wake up the writer if the pipe is still full").
>
> I am going to forget about this report for now and return to it later, when
> all the pending pipe-related changes in vfs.git are merged.
>

How do you ask syzbot for all stacks?

The reproducer *does* use pipes, but it is unclear to me if they play
any role here -- and notably we don't know if there is someone stuck
in pipe code, resulting in not waking up the reported thread.

-- 
Mateusz Guzik <mjguzik gmail.com>