linux-kernel - Re: [PATCH v17 01/15] Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve from granting privs

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Message-ID: <CABqD9hYOJZ5ZZ-8W03d=_BQ2mkdNLbrC2=r6qUrnqsaub3kPCA@mail.gmail.com>
Date:	Tue, 10 Apr 2012 14:12:55 -0500
From:	Will Drewry <wad@...omium.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com,
	netdev@...r.kernel.org, x86@...nel.org, arnd@...db.de,
	davem@...emloft.net, hpa@...or.com, mingo@...hat.com,
	oleg@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
	mcgrathr@...omium.org, tglx@...utronix.de, luto@....edu,
	eparis@...hat.com, serge.hallyn@...onical.com, djm@...drot.org,
	scarybeasts@...il.com, indan@....nu, pmoore@...hat.com,
	corbet@....net, eric.dumazet@...il.com, markus@...omium.org,
	coreyb@...ux.vnet.ibm.com, keescook@...omium.org,
	jmorris@...ei.org, Andy Lutomirski <luto@...capital.net>
Subject: Re: [PATCH v17 01/15] Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve
 from granting privs

On Fri, Apr 6, 2012 at 2:49 PM, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Thu, 29 Mar 2012 15:01:46 -0500
> Will Drewry <wad@...omium.org> wrote:
>
>> From: Andy Lutomirski <luto@...capital.net>
>>
>> With this set, a lot of dangerous operations (chroot, unshare, etc)
>> become a lot less dangerous because there is no possibility of
>> subverting privileged binaries.
>>
>> This patch completely breaks apparmor.  Someone who understands (and
>> uses) apparmor should fix it or at least give me a hint.
>
> So [patch 2/15] fixes all this up?
>
> I guess we should join the two patches into one, to avoid a silly
> breakage window.  That means that John loses a brownie point, but we
> can mention him in the changelog, include his signed-off-by:
>
>> Signed-off-by: Andy Lutomirski <luto@...capital.net>
>
> Several of these patches are missing your signed-off-by:.  They should
> all have your SOB, because you sent them.
> Documentation/SubmittingPatches explains this.

Oops - I'll add them!

> I'm trying to find a way to merge all this code without reviewing it ;)
> Alas, this is against my rules.  Given the length of time for which
> this patchset has been floating around, I'm a little surprised by the
> lack of acked-by's and reviewed-by's.  Have you been gathering them all
> up?  Are the networking guys all happy about this patchset?

eric.dumazet@...il.com acked the networking ones, and I have a
smattering of others for the other patches. Given the review and
feedback, I don't have a huge number of acked/reviewed-bys. I tried
not to lose any after the first couple of revs, but I know I did some
things wrong early on.

I can prod some others who've contributed to add their tags, unless
there is a good reason for them not too.  I suspect it was just
because of partial/drive-by reviewing, but I don't know.

thanks!
will
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