From: Dmitry Vyukov <dvyukov@google.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: syzbot <syzbot+111bc509cd9740d7e4aa@syzkaller.appspotmail.com>,
Borislav Petkov <bp@alien8.de>,
"open list:ANDROID DRIVERS" <devel@driverdev.osuosl.org>,
Dou Liyang <douly.fnst@cn.fujitsu.com>,
forest@alittletooquiet.net, "H. Peter Anvin" <hpa@zytor.com>,
konrad.wilk@oracle.com, Len Brown <len.brown@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
puwen@hygon.cn, syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
Thomas Gleixner <tglx@linutronix.de>,
tvboxspy@gmail.com, wang.yi59@zte.com.cn,
"the arch/x86 maintainers" <x86@kernel.org>
Subject: Re: WARNING in rcu_check_gp_start_stall
Date: Mon, 18 Mar 2019 13:18:04 +0100 [thread overview]
Message-ID: <CACT4Y+YrrTtEAVidT+DiW1Wet0uxEtNP2kjjWN6GYDo8423SCg@mail.gmail.com> (raw)
In-Reply-To: <20190317110447.GA3885@kroah.com>
On Sun, Mar 17, 2019 at 12:04 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Sun, Mar 17, 2019 at 03:43:01AM -0700, syzbot wrote:
> > syzbot has bisected this bug to:
> >
> > commit f1e3e92135202ff3d95195393ee62808c109208c
> > Author: Malcolm Priestley <tvboxspy@gmail.com>
> > Date: Wed Jul 22 18:16:42 2015 +0000
> >
> > staging: vt6655: fix tagSRxDesc -> next_desc type
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=111856cf200000
> > start commit: f1e3e921 staging: vt6655: fix tagSRxDesc -> next_desc type
> > git tree: upstream
> > final crash: https://syzkaller.appspot.com/x/report.txt?x=131856cf200000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=151856cf200000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=7132344728e7ec3f
> > dashboard link: https://syzkaller.appspot.com/bug?extid=111bc509cd9740d7e4aa
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d4966cc00000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c492d0c00000
> >
> > Reported-by: syzbot+111bc509cd9740d7e4aa@syzkaller.appspotmail.com
> > Fixes: f1e3e921 ("staging: vt6655: fix tagSRxDesc -> next_desc type")
>
> I think syzbot is a bit confused here, how can this simple patch, where
> you do not have the hardware for this driver, cause this problem?
Yes, I guess so.
This perf_event_open+sched_setattr combo bug causes problems with
hangs at random places, developers looking at these hangs again and
again, incorrect bisection. I would be useful if somebody
knowledgeable in perf/sched look at it.
prev parent reply other threads:[~2019-03-18 12:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 17:10 WARNING in rcu_check_gp_start_stall syzbot
2019-02-22 22:20 ` Borislav Petkov
2019-02-23 10:33 ` Dmitry Vyukov
2019-02-23 10:38 ` Borislav Petkov
2019-02-23 10:50 ` Dmitry Vyukov
2019-02-23 10:56 ` Borislav Petkov
2019-03-17 10:43 ` syzbot
2019-03-17 11:04 ` Greg KH
2019-03-18 12:18 ` Dmitry Vyukov [this message]
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