linux-kernel - RE: [PATCH] TTY: Wrong unicode value copied in con_set

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Message-ID: <51D3961FBAB878428126A3DD5A715A3A60EA9094CE@GVW1338EXA.americas.hpqcorp.net>
Date:	Thu, 15 Mar 2012 19:36:34 +0000
From:	"Clark, Liz" <liz.clark@...com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] TTY: Wrong unicode value copied in con_set_unimap()

> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Thursday, March 15, 2012 11:55 AM
> To: Clark, Liz
> Cc: linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] TTY: Wrong unicode value copied in
> con_set_unimap()
> 
> On Thu, Mar 15, 2012 at 10:33:29AM -0700, Liz Clark wrote:
> > Bugzilla 40012: PIO_UNIMAP bug: error updating Unicode-to-font map
> >
> > The unicode font map for the virtual console is a 32x32x64 table
> which
> > allocates rows dynamically as entries are added.  The unicode value
> > increases sequentially and should count all entries even in empty
> > rows.  The defect is when copying the unicode font map in
> con_set_unimap(),
> > the unicode value is not incremented properly.  The wrong unicode
> value
> > is entered in the new font map.
> >
> > Signed-off-by: Liz Clark <liz.clark@...com>
> 
> Is this a new problem caused by recent changes in this area, or has it
> always been there and needs to be backported to older kernels to solve
> the problem there?
> 
> thanks,
> 
> greg k-h


The code with the defect was introduced in v2.1.112.  Prior to that the fontmap was not copied at all in con_set_unimap().


Liz
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