Re: [syzbot] possible deadlock in virtual_nci_close

[Dmitry Vyukov]

On Wed, 16 Nov 2022 at 06:58, syzbot
<syzbot+8040d16d30c215f821de@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot has bisected this issue to:
>
> commit e624e6c3e777fb3dfed036b9da4d433aee3608a5
> Author: Bongsu Jeon <bongsu.jeon@xxxxxxxxxxx>
> Date:   Wed Jan 27 13:08:28 2021 +0000
>
>     nfc: Add a virtual nci device driver
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1093fb59880000
> start commit:   094226ad94f4 Linux 6.1-rc5
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1293fb59880000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1493fb59880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7d516a992a8757b5
> dashboard link: https://syzkaller.appspot.com/bug?extid=8040d16d30c215f821de
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1360e2f1880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14a95659880000
>
> Reported-by: syzbot+8040d16d30c215f821de@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: e624e6c3e777 ("nfc: Add a virtual nci device driver")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: NFC: nci: Allow to create multiple virtual nci devices