linux-kernel - Re: [syzbot] [bluetooth?] possible deadlock in sco_conn

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Date:   Mon, 19 Jun 2023 08:10:19 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+b825d87fe2d043e3e652@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, fgheet255t@...il.com,
        hdanton@...a.com, johan.hedberg@...il.com, josephsih@...omium.org,
        kuba@...nel.org, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, lrh2000@....edu.cn,
        luiz.dentz@...il.com, luiz.von.dentz@...el.com,
        marcel@...tmann.org, netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, yinghsu@...omium.org
Subject: Re: [syzbot] [bluetooth?] possible deadlock in sco_conn_del

On Fri, 16 Jun 2023 at 17:09, syzbot
<syzbot+b825d87fe2d043e3e652@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit a2ac591cb4d83e1f2d4b4adb3c14b2c79764650a
> Author: Ruihan Li <lrh2000@....edu.cn>
> Date:   Wed May 3 13:39:36 2023 +0000
>
>     Bluetooth: Fix UAF in hci_conn_hash_flush again
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13755717280000
> start commit:   e4cf7c25bae5 Merge tag 'kbuild-fixes-v6.2' of git://git.ke..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=555d27e379d75ff1
> dashboard link: https://syzkaller.appspot.com/bug?extid=b825d87fe2d043e3e652
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10052058480000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1190687c480000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: Bluetooth: Fix UAF in hci_conn_hash_flush again
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks reasonable:

#syz fix: Bluetooth: Fix UAF in hci_conn_hash_flush again