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From:   ebiederm@xmission.com (Eric W. Biederman)
To:     Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc:     Dmitry Vyukov <dvyukov@google.com>,
        "Theodore Ts'o" <tytso@mit.edu>, Pavel Machek <pavel@ucw.cz>,
        Mike Galbraith <efault@gmx.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        syzkaller <syzkaller@googlegroups.com>
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        <20180124160438.0da2b219@alans-desktop>
Date:   Wed, 24 Jan 2018 11:06:02 -0600
In-Reply-To: <20180124160438.0da2b219@alans-desktop> (Alan Cox's message of
        "Wed, 24 Jan 2018 16:04:38 +0000")
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Subject: Re: LKML admins (syzbot emails are not delivered)
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Alan Cox <gnomes@lxorguk.ukuu.org.uk> writes:

> On Tue, 16 Jan 2018 09:34:01 +0100
> Dmitry Vyukov <dvyukov@google.com> wrote:
>
>> On Tue, Jan 16, 2018 at 8:12 AM, Theodore Ts'o <tytso@mit.edu> wrote:
>> >> Outside of the bugs being considered as considered as security issues,
>> >> the bugs syzbot finds are generally things that don't affect anyone in
>> >> practice.  So are very low on the priority of things to get fixed.  
>> 
>> Not sure why are you saying this, but syzbot has found lots of
>> hundreds of use-after-free's, out-of-bounds, information leaks,
>> deadlocks, vm escapes, etc. They have very direct stability and
>> security impact.
>
> Agreed - there may be some UI and presentation issues but it's found some
> really nasty little bugs.

I am not certain it has always really found the bugs it hits.

My experience tends towards a bug report with too little information
in the Oops to guess what went wrong, that I can not reproduce the
issue locally, that the no can reproduce, that was produced on a weird
tree, and with a reporter telling you they are only interested in
testing fixes.

Which is a long way of saying if the UI issues are bad enough the issue
can not be identified in the code I am not certain we have actually
found a bug.

So while I can see lots of potential in syzbot.  I can't say if the it
is greater potential to get bugs fixed or to annoy developers with
complaints they can't do anything about.

Eric