From: Dmitry Vyukov <dvyukov@google.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: syzbot
<bot+2af19c9e1ffe4d4ee1d16c56ae7580feaee75765@syzkaller.appspotmail.com>,
dvhart@infradead.org, LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>,
syzkaller-bugs@googlegroups.com,
Thomas Gleixner <tglx@linutronix.de>,
andreyknvl <andreyknvl@google.com>
Subject: Re: WARNING in get_pi_state
Date: Tue, 7 Nov 2017 15:50:58 +0100 [thread overview]
Message-ID: <CACT4Y+ZpkVxdPW6zqO_ngQBun-Op7voonjX4zXR9tiFX50_MRQ@mail.gmail.com> (raw)
In-Reply-To: <20171031100852.pdifddw4lkc5fqfc@hirez.programming.kicks-ass.net>
On Tue, Oct 31, 2017 at 11:08 AM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, Oct 31, 2017 at 12:29:50PM +0300, Dmitry Vyukov wrote:
>> I understand your sentiment, but it's definitely not _at all_. The
>> system compiled this exact code, run it and triggered the bug on it.
>> Do you have suggestions on how to make this code more portable? How
>> does this setup would look on your system?
>
> So I don't see the point of that tun stuff; what was is supposed to do?
>
> All it ever did after creation was flush_tun(), which reads until empty.
> But given nobody would ever write into it, that's an 'expensive' NO-OP.
I've filed https://github.com/google/syzkaller/issues/414 for this. If
the program does not use tun, we will strip that code right away.
Thanks for feedback.
prev parent reply other threads:[~2017-11-07 14:51 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-30 19:44 WARNING in get_pi_state syzbot
2017-10-30 19:53 ` Dmitry Vyukov
2017-10-31 8:36 ` Peter Zijlstra
2017-10-31 10:18 ` Peter Zijlstra
2017-10-31 10:31 ` Peter Zijlstra
2017-10-31 10:38 ` Peter Zijlstra
2017-11-01 8:45 ` Peter Zijlstra
2017-11-07 16:16 ` Dmitry Vyukov
2017-10-31 12:06 ` [tip:core/urgent] futex: Fix more put_pi_state() vs. exit_pi_state_list() races tip-bot for Peter Zijlstra
2017-10-31 22:11 ` Thomas Gleixner
2017-11-01 8:05 ` Ingo Molnar
2017-11-01 8:09 ` tip-bot for Peter Zijlstra
2017-10-31 9:16 ` WARNING in get_pi_state Peter Zijlstra
2017-10-31 9:29 ` Dmitry Vyukov
2017-10-31 10:08 ` Peter Zijlstra
2017-10-31 10:21 ` Dmitry Vyukov
2017-10-31 10:23 ` Dmitry Vyukov
2017-10-31 10:36 ` Peter Zijlstra
2017-11-07 14:50 ` Dmitry Vyukov [this message]
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