linux-kernel - Re: [PATCH 1/1] tty: n_gsm: Avoid sleeping during .write() whilst atomic

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Message-ID: <1c2afee3-6c1b-4703-8b9a-487f96a2526b@kernel.org>
Date:   Thu, 5 Oct 2023 06:59:50 +0200
From:   Jiri Slaby <jirislaby@...nel.org>
To:     Lee Jones <lee@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Daniel Starke <daniel.starke@...mens.com>,
        Fedor Pchelkin <pchelkin@...ras.ru>,
        linux-serial@...r.kernel.org,
        syzbot+5f47a8cea6a12b77a876@...kaller.appspotmail.com
Subject: Re: [PATCH 1/1] tty: n_gsm: Avoid sleeping during .write() whilst
 atomic

On 04. 10. 23, 14:57, Lee Jones wrote:
>>> n_gsm is available on all the systems I have available.  The mention of
>>> 'EXPERIMENTAL' in the module description appears to have zero effect on
>>> whether distros choose to make it available or not.  If you're saying
>>> that we know this module is BROKEN however, then perhaps we should mark
>>> it as such.
>>
>> Also, I think this requires root to set this line discipline to the
>> console, right?  A normal user can't do that, or am I missing a code
>> path here?
> 
> I haven't been testing long, but yes, early indications show that root
> is required.

FWIW I concluded to the same yesterday, so I disputed the connected 
CVE-2023-31082. Waiting for mitre's ack/nack.

thanks,
-- 
js
suse labs