Re: [PATCH] Add possibility to set /dev/tty number

From	Greg KH <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] Add possibility to set /dev/tty number
Date	2016-01-05 16:30 +0100
Message-ID	<qNBIC-4FF-21@gated-at.bofh.it> (permalink)
References	(1 earlier) <qNfyq-5lo-9@gated-at.bofh.it> <qNgEb-609-23@gated-at.bofh.it> <qNgXx-6p8-33@gated-at.bofh.it> <qNimD-7d3-29@gated-at.bofh.it> <qNvDc-84L-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Jan 05, 2016 at 09:51:14AM +0100, Pierre Paul MINGOT wrote:
> In industrial sector, for obvious security and safety reasons we want
> configure our system and have a full control of the devices within it.
> So unused or dummy devices are not wanted , not nice to have.
>  One way to achieve this goal is to have a full picture of the devices
> in our system and then identified which type of applications can run
> and then safety or security potential risks. Base on this analysis we
> can put in place mandatory actions to fix the risks.
> An other interest for reduce dummy /dev devices is hot-plug device
> creation detection through inotify or udev. Indeed, we can configure
> udev or inotify for monitoring the /dev directory and notify watched
> dedicated events. lesser the devices in /dev is better the response
> is. This aspect is crucial for RTOS with very high time constraint
> near of microseconds. It's the case for example for a system with
> Linux RT Patch or Xenomai.

I don't understand how reducing the number of vt devices makes anything
more or less secure, or better yet, more responsive.  Please provide
specific details showing how this happens.

thanks,

greg k-h
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Thread

[PATCH] Add possibility to set /dev/tty number Pierre Paul MINGOT <mingot.pierre@gmail.com> - 2016-01-04 16:40 +0100
  Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-04 16:50 +0100
    Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-04 18:00 +0100
      Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-04 18:20 +0100
        Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-04 19:50 +0100
          Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-05 00:00 +0100
            Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 14:20 +0100
              Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 16:30 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 16:40 +0100
              Re: [PATCH] Add possibility to set /dev/tty number Theodore Ts'o <tytso@mit.edu> - 2016-01-05 17:20 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 17:30 +0100
          Re: [PATCH] Add possibility to set /dev/tty number Pierre Paul MINGOT <mingot.pierre@gmail.com> - 2016-01-05 10:00 +0100
            Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 14:10 +0100
            Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 16:30 +0100
              Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 16:50 +0100
                Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 17:10 +0100
          Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 19:40 +0100
            Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-05 21:50 +0100
              Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 13:50 +0100
                Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-06 15:00 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 15:10 +0100
  Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 14:50 +0100

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