linux-kernel - Re: WARNING in kernfs_new

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Message-ID: <00000000000066c5a605a366e88c@google.com>
Date:   Thu, 16 Apr 2020 04:41:04 -0700
From:   syzbot <syzbot+499aea72daa2cea73cb7@...kaller.appspotmail.com>
To:     benh@...nel.crashing.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, longman@...hat.com, mingo@...nel.org,
        peterz@...radead.org, rafael@...nel.org,
        syzkaller-bugs@...glegroups.com, tj@...nel.org,
        torvalds@...ux-foundation.org
Subject: Re: WARNING in kernfs_new_node

syzbot suspects this bug was fixed by commit:

commit 810507fe6fd5ff3de429121adff49523fabb643a
Author: Waiman Long <longman@...hat.com>
Date:   Thu Feb 6 15:24:08 2020 +0000

    locking/lockdep: Reuse freed chain_hlocks entries

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=177d726fe00000
start commit:   1e78030e Merge tag 'mmc-v5.3-rc1' of git://git.kernel.org/..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=e397351d2615e10
dashboard link: https://syzkaller.appspot.com/bug?extid=499aea72daa2cea73cb7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=111d80fc600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d9060c600000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: locking/lockdep: Reuse freed chain_hlocks entries

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