linux-kernel - Re: WARNING in untrack

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Message-ID: <20190412130112.GA8384@amd>
Date:   Fri, 12 Apr 2019 15:01:12 +0200
From:   Pavel Machek <pavel@....cz>
To:     syzbot <syzbot+e1a4f80c370d2381e49f@...kaller.appspotmail.com>
Cc:     Julia.Lawall@...6.fr, bp@...en8.de, dan.j.williams@...el.com,
        dave.hansen@...ux.intel.com, dave.jiang@...el.com,
        haozhong.zhang@...el.com, hpa@...or.com,
        jacek.anaszewski@...il.com, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org, luto@...nel.org, mingo@...hat.com,
        pbonzini@...hat.com, peterz@...radead.org, rkrcmar@...hat.com,
        rpurdie@...ys.net, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org
Subject: Re: WARNING in untrack_pfn

On Fri 2019-04-12 04:42:01, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit c68729119f4d2993bec3c9cb999ad76de5aeddba
> Author: Julia Lawall <Julia.Lawall@...6.fr>
> Date:   Sat Jul 15 09:58:19 2017 +0000
> 
>     leds: tlc591xx: add missing of_node_put
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12cda0f3200000
> start commit:   23203e3f Merge branch 'akpm' (patches from Andrew)
> git tree:       upstream
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=11cda0f3200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=16cda0f3200000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=861a3573f4e78ba1
> dashboard link: https://syzkaller.appspot.com/bug?extid=e1a4f80c370d2381e49f
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17836d15400000
> 
> Reported-by: syzbot+e1a4f80c370d2381e49f@...kaller.appspotmail.com
> Fixes: c68729119f4d ("leds: tlc591xx: add missing of_node_put")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Can you revert c68729119f4d2993bec3c9cb999ad76de5aeddba on master and
see  if it fixes the problem? Because this is hard to believe...

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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