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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Thu, 22 Mar 2018 14:36:55 +0100
Message-ID: <CACT4Y+a2KB6vvgFcqkq7cMCiCZQEFNxsCTgP+_gtgju8H2q9hQ@mail.gmail.com>
Subject: Re: WARNING: ODEBUG bug in process_one_req
To:     Leon Romanovsky <leonro@mellanox.com>
Cc:     syzbot <syzbot+3b4acab09b6463472d0a@syzkaller.appspotmail.com>,
        danielj@mellanox.com, dledford@redhat.com,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Johannes Berg <johannes.berg@intel.com>,
        LKML <linux-kernel@vger.kernel.org>, linux-rdma@vger.kernel.org,
        monis@mellanox.com, Paolo Abeni <pabeni@redhat.com>,
        parav@mellanox.com, Roland Dreier <roland@purestorage.com>,
        syzkaller-bugs@googlegroups.com, yuval.shaia@oracle.com
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On Thu, Mar 22, 2018 at 2:20 PM, Leon Romanovsky <leonro@mellanox.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?