linux-kernel - Re: BUG: workqueue lockup (4)

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Message-ID: <20181007193918.GC32272@piout.net>
Date:   Sun, 7 Oct 2018 21:39:18 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+08116743f8ad6f9a6de7@...kaller.appspotmail.com>,
        a.zummo@...ertech.it, linux-rtc@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: BUG: workqueue lockup (4)

Hi,

On 07/10/2018 14:18:31+0200, Dmitry Vyukov wrote:
> On Sun, Oct 7, 2018 at 2:15 PM, syzbot
> <syzbot+08116743f8ad6f9a6de7@...kaller.appspotmail.com> wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit:    c1d84a1b42ef Merge git://git.kernel.org/pub/scm/linux/kern..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=14c5f491400000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=c0af03fe452b65fb
> > dashboard link: https://syzkaller.appspot.com/bug?extid=08116743f8ad6f9a6de7
> > compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14514a6e400000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1025ebb9400000
> 
> The reproducer seems to be all about rtc. So +rtc maintainers.
> 

It seems to be that bug:
http://patchwork.ozlabs.org/patch/898552/

I'm pretty sure the fix is not correct though and didn't have the time
to work on a proper fix.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com