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Message-ID: <CACT4Y+bjbJ4z_FbWednxQe=0J5m37f1v5yjDH4zDfQVgw1EWFA@mail.gmail.com>
Date:   Wed, 30 Nov 2022 10:30:22 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+4adf5ff0f6e6876c6a81@...kaller.appspotmail.com>,
        马麟 <kylin.formalin@...il.com>,
        bongsu.jeon@...sung.com
Cc:     clement.perrochaud@....com, krzysztof.kozlowski@...aro.org,
        linma@....edu.cn, linux-kernel@...r.kernel.org,
        michael.thalmeier@...e.at, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in nci_send_cmd

On Thu, 17 Nov 2022 at 01:34, syzbot
<syzbot+4adf5ff0f6e6876c6a81@...kaller.appspotmail.com> wrote:
>
> syzbot has bisected this issue to:
>
> commit e624e6c3e777fb3dfed036b9da4d433aee3608a5
> Author: Bongsu Jeon <bongsu.jeon@...sung.com>
> 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=1338e6e9880000
> start commit:   81e7cfa3a9eb Merge tag 'erofs-for-6.1-rc6-fixes' of git://..
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=10b8e6e9880000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1738e6e9880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a2318f9a4fc31ad
> dashboard link: https://syzkaller.appspot.com/bug?extid=4adf5ff0f6e6876c6a81
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11f435be880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1134d295880000
>
> Reported-by: syzbot+4adf5ff0f6e6876c6a81@...kaller.appspotmail.com
> Fixes: e624e6c3e777 ("nfc: Add a virtual nci device driver")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz dup: WARNING in nci_send_cmd

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