linux-kernel - Re: WARNING: bad unlock balance in rcu

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Date:   Mon, 04 May 2020 00:05:04 -0700
From:   syzbot <syzbot+36baa6c2180e959e19b1@...kaller.appspotmail.com>
To:     aia21@...tab.net, bvanassche@....org, dvyukov@...gle.com,
        gaoxiang25@...wei.com, jack@...e.cz, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, miaoxie@...wei.com, mingo@...nel.org,
        mingo@...hat.com, peterz@...radead.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk,
        will@...nel.org
Subject: Re: WARNING: bad unlock balance in rcu_core

syzbot suspects this bug was fixed by commit:

commit 10476e6304222ced7df9b3d5fb0a043b3c2a1ad8
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Fri Mar 13 08:56:38 2020 +0000

    locking/lockdep: Fix bad recursion pattern

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=142baee4100000
start commit:   5a1e843c Merge tag 'mips_fixes_5.4_3' of git://git.kernel...
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=420126a10fdda0f1
dashboard link: https://syzkaller.appspot.com/bug?extid=36baa6c2180e959e19b1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1108239ce00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13cf40a8e00000

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

#syz fix: locking/lockdep: Fix bad recursion pattern

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