linux-kernel - Re: WARNING: refcount bug in kobject_add

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Message-ID: <000000000000106b11058ca6f7f2@google.com>
Date:   Mon, 01 Jul 2019 16:27:01 -0700
From:   syzbot <syzbot+32259bb9bc1a487ad206@...kaller.appspotmail.com>
To:     benh@...nel.crashing.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, rafael@...nel.org,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org
Subject: Re: WARNING: refcount bug in kobject_add_internal

syzbot has bisected this bug to:

commit 726e41097920a73e4c7c33385dcc0debb1281e18
Author: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Date:   Tue Jul 10 00:29:10 2018 +0000

     drivers: core: Remove glue dirs from sysfs earlier

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=140d6739a00000
start commit:   6fbc7275 Linux 5.2-rc7
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=160d6739a00000
console output: https://syzkaller.appspot.com/x/log.txt?x=120d6739a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bff6583efcfaed3f
dashboard link: https://syzkaller.appspot.com/bug?extid=32259bb9bc1a487ad206
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=115bad39a00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1241bdd5a00000

Reported-by: syzbot+32259bb9bc1a487ad206@...kaller.appspotmail.com
Fixes: 726e41097920 ("drivers: core: Remove glue dirs from sysfs earlier")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection