linux-kernel - Re: WARNING in kernfs

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Date:   Wed, 20 Nov 2019 00:17:01 -0800
From:   syzbot <syzbot+3dcb532381f98c86aeb1@...kaller.appspotmail.com>
To:     benh@...nel.crashing.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, penguin-kernel@...ove.SAKURA.ne.jp,
        rafael@...nel.org, syzkaller-bugs@...glegroups.com, tj@...nel.org,
        torvalds@...ux-foundation.org
Subject: Re: WARNING in kernfs_get

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=17a101cee00000
start commit:   9a568276 Merge branch 'x86-urgent-for-linus' of git://git...
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=146101cee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=106101cee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f59875069d721b6
dashboard link: https://syzkaller.appspot.com/bug?extid=3dcb532381f98c86aeb1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12657f0a400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=117728ae400000

Reported-by: syzbot+3dcb532381f98c86aeb1@...kaller.appspotmail.com
Fixes: 726e41097920 ("drivers: core: Remove glue dirs from sysfs earlier")

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