linux-kernel - Re: [PATCH v3 part1 0/4] Fix SG_IO ambiguity between READ SUBCHANNEL and UNMAP (and other similar cases)

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Message-ID: <20140827120806.GF10937@hercules>
Date:	Wed, 27 Aug 2014 13:08:06 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	linux-kernel@...r.kernel.org, tj@...nel.org
Subject: Re: [PATCH v3 part1 0/4] Fix SG_IO ambiguity between READ SUBCHANNEL
 and UNMAP (and other similar cases)

On Wed, Aug 27, 2014 at 12:09:41PM +0200, Paolo Bonzini wrote:
> Il 27/08/2014 11:34, Luis Henriques ha scritto:
> > > The SG_IO ioctl's command whitelist is designed for MMC devices (roughly,
> > > "play/burn CDs without requiring root") but some opcodes overlap across SCSI
> > > device classes and have different meanings for different classes.
> > > 
> > > To fix this, use different bitmaps for the various device classes.
> > > This is CVE-2012-4542.
> >
> > Sorry for bringing this old issue again, but I was wondering what
> > happen to this fix.
> 
> Nothing; everybody lost interest in it.

Thanks a lot for the update, Paolo.

This is what I was actually expecting, although it's somewhat
surprising, taking into account this is a security issue :-)

Cheers,
--
Luís
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