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Date:   Tue, 13 Aug 2019 13:31:54 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     syzbot <syzbot+e1a4f80c370d2381e49f@syzkaller.appspotmail.com>
Cc:     Julia.Lawall@lip6.fr, bp@alien8.de, dan.j.williams@intel.com,
        dave.hansen@linux.intel.com, dave.jiang@intel.com,
        dvyukov@google.com, haozhong.zhang@intel.com, hpa@zytor.com,
        jacek.anaszewski@gmail.com, linux-kernel@vger.kernel.org,
        linux-leds@vger.kernel.org, luto@kernel.org, mingo@redhat.com,
        pbonzini@redhat.com, peterz@infradead.org, rkrcmar@redhat.com,
        rpurdie@rpsys.net, syzkaller-bugs@googlegroups.com,
        tglx@linutronix.de, x86@kernel.org
Subject: Re: WARNING in untrack_pfn
Message-ID: <20190813113154.GA8420@amd>
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On Tue 2019-08-13 03:56:06, syzbot wrote:
> syzbot has found a reproducer for the following crash on:

Unsigned emails are ugly. Could the "From: " be modified to include
name of responsible person?

> HEAD commit:    d45331b0 Linux 5.3-rc4
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=3D16130d4a600000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3D3d7eaed8496da=
4da
> dashboard link: https://syzkaller.appspot.com/bug?extid=3De1a4f80c370d238=
1e49f
> compiler:       clang version 9.0.0 (/home/glider/llvm/clang
> 80fee25776c2fb61e74c1ecb1a523375c2500b69)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=3D131f8e0e600=
000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=3D10e1a1ee600000
>=20
> The bug was bisected to:
>=20
> commit c68729119f4d2993bec3c9cb999ad76de5aeddba
> Author: Julia Lawall <Julia.Lawall@lip6.fr>
> Date:   Sat Jul 15 09:58:19 2017 +0000
>=20
>     leds: tlc591xx: add missing of_node_put

And this looks like mistake. I don't think this commit is causing the
crash. Can you somehow verify?

								Pavel
							=09
--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

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