linux-kernel - Re: [alsa-devel] [PATCH] ALSA: msnd: Optimize / harden DSP and MIDI loops

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Date:   Tue, 12 Sep 2017 14:38:14 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Cc:     "Grygorii Tertychnyi (gtertych)" <gtertych@...co.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "xe-linux-external(mailer list)" <xe-linux-external@...co.com>
Subject: Re: [alsa-devel] [PATCH] ALSA: msnd: Optimize / harden DSP and MIDI loops

On Tue, 12 Sep 2017 14:34:18 +0200,
gregkh@...uxfoundation.org wrote:
> 
> On Tue, Sep 12, 2017 at 09:17:38AM +0200, Takashi Iwai wrote:
> > On Fri, 08 Sep 2017 19:47:32 +0200,
> > Grygorii Tertychnyi (gtertych) wrote:
> > > 
> > > 
> > > >> Hi Greg,
> > > >>
> > > >> Could you please apply it for 4.4-stable.
> > > >> This fixes https://nvd.nist.gov/vuln/detail/CVE-2017-9985
> > > >
> > > > This vulnerability is just non-issue.  You can't get it working
> > > > practically; it requires a modified hardware of the decade old ISA
> > > > sound card, and yet the system has to load / set up the module
> > > > beforehand.  We should withdraw it from CVE, IMO.
> > > 
> > > I think it is worth having it in 4.4, 4.9 and 4.12 also.
> > 
> > ... even though the code has never been tested on the real hardware?
> > That doesn't sound good for stable kernels at all.  That's why I
> > didn't put Cc to stable in the patch.
> 
> Oh, I didn't know that, want me to drop the patch from the stable queues
> now?

Honestly, I don't mind.  The patch should work, and even if it
doesn't, it would be harmless as no one can see the breakage in
practice :)

It's just ridiculous that people urge such commit for stable kernels
even though they never tested / care the real cases but only look at
the CVE entry.


thanks,

Takashi