linux-kernel - Re: WARNING: ODEBUG bug in process_one

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Message-ID: <20180322142900.GD19440@mtr-leonro.local>
Date:   Thu, 22 Mar 2018 16:29:00 +0200
From:   Leon Romanovsky <leonro@...lanox.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+3b4acab09b6463472d0a@...kaller.appspotmail.com>,
        danielj@...lanox.com, dledford@...hat.com,
        Jason Gunthorpe <jgg@...pe.ca>,
        Johannes Berg <johannes.berg@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-rdma@...r.kernel.org,
        monis@...lanox.com, Paolo Abeni <pabeni@...hat.com>,
        parav@...lanox.com, Roland Dreier <roland@...estorage.com>,
        syzkaller-bugs@...glegroups.com, yuval.shaia@...cle.com
Subject: Re: WARNING: ODEBUG bug in process_one_req

On Thu, Mar 22, 2018 at 02:36:55PM +0100, Dmitry Vyukov wrote:
> On Thu, Mar 22, 2018 at 2:20 PM, Leon Romanovsky <leonro@...lanox.com> wrote:
> > On Thu, Mar 22, 2018 at 02:10:21PM +0100, Dmitry Vyukov wrote:
> >> This bug is actively happening several times per day, if such bug is
> >> closed syzbot will open another bug on the next crash.
> >> This bug has a reproducer, why do you think it is invalid?
> >
> > I tried to reproduce it on latest rdma-next and failed, so wanted to
> > start from clean page and see if it is still relevant.
>
> Ah,  I see.
> You can now see the current status on dashboard:
> https://syzkaller.appspot.com/bug?id=d4ac7bfeafac8a3d6d06123e078462ac765415e7
> Yes, it still happens.
>
> syzbot has already reported another incarnation of this bug, you can
> see the link to dashboard in the email:
> https://syzkaller.appspot.com/bug?extid=b8d5eb964e412cfd2678
> and it contains a link to the first version with reproducer.
>
> > Does it still reproduce on latest rdma-next?
>
> syzbot does not test rdma-next.
>
> But can you reproduce it on upstream tree where syzbot hits it? Just
> to make sure, you have ODEBUG enabled, right?

Thanks for the tip, I added more debug options and returned to try the
repro on clean v4.16-rc1, it looks like I still don't have all needed
config options (SELinux).

  mount(selinuxfs) failed (errno 2)

Can you please cancel my email that closes this bug?

Thanks

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