linux-kernel - Re: stable-security kernel updates

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Date:	Thu, 21 Apr 2016 14:50:38 +0200
From:	Willy Tarreau <w@....eu>
To:	Greg KH <greg@...ah.com>
Cc:	Jiri Slaby <jslaby@...e.cz>, Sasha Levin <sasha.levin@...cle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>, lwn@....net
Subject: Re: stable-security kernel updates

On Thu, Apr 21, 2016 at 09:39:18PM +0900, Greg KH wrote:
> On Thu, Apr 21, 2016 at 02:05:41PM +0200, Jiri Slaby wrote:
> > On 04/21/2016, 01:59 PM, Jiri Slaby wrote:
> > >> (CVE-2016-2085) 613317b EVM: Use crypto_memneq() for digest comparisons
> > > 
> > > Does not exist in the CVE database/is not confirmed yet AFAICS.
> > 
> > And now I am looking at the patch and I remember why I threw it away.
> > crypto_memneq is not in 3.12 yet and I was not keen enough to backport  it.
> 
> Which brings up the question, Sasha, why did you think these CVEs were
> relevant for 3.12?  What were you basing that list on?

Yep same question here because in fact checking what is *missing* is
harder than checking what should not have been there. I'm pretty sure
I missed a lot of things in 2.6.32 (though Ben and Moritz helped a lot)
but precisely the fact that they provided me fixes I wasn't aware of is
a sign that I can miss things.

Any reliable process to check for missing fixes is welcome of course. For
now the best way I found is to pick from more recent stable versions, which
also ensures people upgrading from and older branch to a newer branch will
not find a bug they used to see fixed.

Cheers,
Willy