linux-kernel - Re: WARNING: refcount bug in l2cap_chan

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Date:   Sat, 05 Sep 2020 18:07:05 -0700
From:   syzbot <syzbot+198362c76088d1515529@...kaller.appspotmail.com>
To:     abhishekpandit@...omium.org, alainm@...omium.org,
        bliniob53@...il.com, davem@...emloft.net, johan.hedberg@...il.com,
        kuba@...nel.org, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, luiz.dentz@...il.com,
        marcel@...tmann.org, mcchou@...omium.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: WARNING: refcount bug in l2cap_chan_put

syzbot suspects this issue was fixed by commit:

commit b83764f9220a4a14525657466f299850bbc98de9
Author: Miao-chen Chou <mcchou@...omium.org>
Date:   Tue Jun 30 03:15:00 2020 +0000

    Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11aaff5d900000
start commit:   fffe3ae0 Merge tag 'for-linus-hmm' of git://git.kernel.org..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=18bb86f2e4ebfda2
dashboard link: https://syzkaller.appspot.com/bug?extid=198362c76088d1515529
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152a482c900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=109b781a900000

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

#syz fix: Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()

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