linux-kernel - Re: [PATCH] Clean console safely

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Message-ID: <20110413150113.GA8121@suse.de>
Date:	Wed, 13 Apr 2011 08:01:13 -0700
From:	Greg KH <gregkh@...e.de>
To:	Petr Písař <ppisar@...hat.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Artem Bityutskiy <dedekind1@...il.com>
Subject: Re: [PATCH] Clean console safely

On Wed, Apr 13, 2011 at 04:54:33PM +0200, Petr Písař wrote:
> Traditional \E[2J sequence erases console display but scroll-back
> buffer and underlying device (frame) buffer keep data that can be
> accessed by scrolling console back.
> 
> This patch introduce new \E[J parameter 3 that allows to scramble
> scroll-back buffer explicitly. Session locking programs (screen,
> vlock) can use it to prevent attacker to browse locked console
> history.

Is this also documented somewhere so that people know about it?

thanks,

greg k-h
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