Re: [PATCH v10 3/4] console: Add persistent scrollback buffers for all VGA consoles

From: Greg KH
Date: Fri Jan 20 2017 - 08:31:49 EST


On Fri, Jan 20, 2017 at 02:16:11PM +0100, Adam Borowski wrote:
> On Fri, Jan 20, 2017 at 12:04:12AM +0100, Adam Borowski wrote:
> > On Thu, Jan 19, 2017 at 05:33:14PM +0100, Greg KH wrote:
> > > On Thu, Jan 19, 2017 at 05:12:15PM +0100, Manuel Schölling wrote:
> > > > On Thu, 2017-01-19 at 14:23 +0100, Greg KH wrote:
> > > > > On Fri, Jan 13, 2017 at 09:07:57PM +0100, Manuel Schölling wrote:
> > > > > > +   This feature might break your tool of choice to flush
> > > > > > the scrollback
> > > > > > +   buffer, e.g. clear(1) will work fine but Debian's
> > > > > > clear_console(1)
> > > > > > +   will be broken, which might cause security issues.
> > > > > > +   You can use the escape sequence \e[3J instead if this
> > > > > > feature is
> > > > > > +   activated.
> > >
> > > I'd recommend that patch get to clear_console() first, having it use the
> > > new escape sequence, if it isn't supported, shouldn't cause any
> > > problems, right?
> >
> > doko: would you consider, pretty please with a cherry on top, applying the
> > patch I've sent to this bug? The privacy/security issue is pretty minor and
> > applies only to a tiny fraction of users, but I understand why Greg is
> > reluctant.
>
> # Subject: Bug#845177 closed by Matthias Klose <doko@xxxxxxxxxx>
> #
> # This is an automatic notification regarding your Bug report
> # which was filed against the bash package:
> #
> # #845177: clear_console: assumes VT switch clears scrollback
> #
> # It has been closed by Matthias Klose <doko@xxxxxxxxxx>.
> [...]
> # Changes:
> # * clear_console: Securely erase the current console. Closes: #845177.

This means it was accepted? Or rejected?

confused,

greg k-h