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References: <000000000000f4efae0584be37ab@google.com> <875zs9oage.fsf@xmission.com>
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From:   Miklos Szeredi <mszeredi@redhat.com>
Date:   Sat, 23 Mar 2019 20:48:44 +0100
Message-ID: <CAOssrKcsXPqH-s-YLYdao3REpD=iQAeX9UvasB3n6RK84PuP=Q@mail.gmail.com>
Subject: Re: WARNING in request_end
To:     "Eric W. Biederman" <ebiederm@xmission.com>
Cc:     syzbot <syzbot+ef054c4d3f64cd7f7cec@syzkaller.appspotmail.com>,
        dvyukov@google.com, ktkhai@virtuozzo.com,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        lkml <linux-kernel@vger.kernel.org>,
        Miklos Szeredi <miklos@szeredi.hu>,
        syzkaller-bugs@googlegroups.com
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On Sat, Mar 23, 2019 at 4:52 PM Eric W. Biederman <ebiederm@xmission.com> wrote:
>
> syzbot <syzbot+ef054c4d3f64cd7f7cec@syzkaller.appspotmail.com> writes:
>
> > syzbot has bisected this bug to:
>
> Nope.  syzbot got it wrong.
>
> At most that commit will allow a larger class of users to mount fuse
> and thus be able to reproduce the problem.
>
> It does look like syzbot has found something concerning though.
>
> Miklos any ideas?

Dup of this?

bc78abbd55dd ("fuse: Fix use-after-free in fuse_dev_do_read()")

Let's test:

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
bc78abbd55dd

Thanks,
Miklos