linux-kernel - Re: [PATCH v4] n_tty: Fix buffer overruns with larger-than-4k pastes

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Message-ID: <52B1A5FB.3030605@hurleysoftware.com>
Date:	Wed, 18 Dec 2013 08:41:15 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	linux-kernel@...r.kernel.org
CC:	Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v4] n_tty: Fix buffer overruns with larger-than-4k pastes

On 12/18/2013 06:48 AM, Henrique de Moraes Holschuh wrote:
> On Mon, 16 Dec 2013, Peter Hurley wrote:
>>> Is this a 3.13-final thing, or can it wait for 3.14-rc1?
>>
>> Definitely not 3.13 at this point -- it should go to -next.
>
> Please earmark it for stable, if possible. This fixes a rather annoying long
> time bug, after all...

There is a (unlikely) possibility that this will cause a regression
in userspace (because this causes a successful read() to return when
it would not have in prior kernels).

I'd like to see this survive into 3.14-rc5+ before this goes to 3.12
& 3.13 -stable.

This will need multiple, different backports for pre-3.12 kernels,
which may not work correctly because pre-3.12 didn't lock out the input
processing worker during termios changes.

Regards,
Peter Hurley

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