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Date:   Mon, 18 Sep 2023 17:19:54 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     "yiyang (D)" <yiyang13@huawei.com>
Cc:     Jiri Slaby <jirislaby@kernel.org>, hedonistsmith@gmail.com,
        daniel.starke@siemens.com,
        linux-serial <linux-serial@vger.kernel.org>
Subject: Re: BUG: sleeping function called from invalid context in
 console_lock
Message-ID: <2023091838-shrubs-paragraph-e579@gregkh>
References: <42c2c0c4-9ee2-6426-8c3c-2585e0345fcb@huawei.com>
 <c1dbec59-9564-5705-1ae6-200860a7371b@huawei.com>
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On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
> In recent years, this problem has been reported in syzkaller all the time.
> 
> Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
> 
> Historically, the developers have tried to fix this problem by use mutex
> instead spinlock, but it didn't solve the problem..
> 
> Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
> 
> Other developers have recently reported this problem, but no one has
> continued to try to fix it.
> 
> Link:
> https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
> 
> Anyway, do we have any ideas for solving this problem?

Nope!  Why do you think this is something that even needs to be
addressed?