From: "Serge E. Hallyn" <serge@hallyn.com>
To: Christoph Lameter <cl@linux.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
Serge Hallyn <serge.hallyn@canonical.com>,
Andy Lutomirski <luto@amacapital.net>,
Aaron Jones <aaronmdjones@gmail.com>, "Ted Ts'o" <tytso@mit.edu>,
linux-security-module@vger.kernel.org, akpm@linuxfoundation.org,
"Andrew G. Morgan" <morgan@kernel.org>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
Austin S Hemmelgarn <ahferroin7@gmail.com>,
Markku Savela <msa@moth.iki.fi>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
Jonathan Corbet <corbet@lwn.net>
Subject: Re: [PATCH] capabilities: Ambient capability set V1
Date: Thu, 26 Feb 2015 09:35:24 -0600 [thread overview]
Message-ID: <20150226153524.GC15182@mail.hallyn.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1502251423580.13489@gentwo.org>
On Wed, Feb 25, 2015 at 02:25:19PM -0600, Christoph Lameter wrote:
> On Wed, 25 Feb 2015, Serge Hallyn wrote:
>
> > Yeah we could make this
>
> Well doing that breaks su.
Don't what exactly? You're saying that doing
pI' = pI
pA' = pA (pA is ambient)
pP' = (X & fP) | (pI & (fI | pA))
pE' = pP' & (fE | pA)
stopped su from having CAP_SETGID while
pI' = pI
pA' = pA (pA is ambient)
pP' = (X & fP) | (pI & (fI | pA))
pE' = pP' & fE
worked? I'll hope you're saying both "fail", in which case
> Its best to leave perm bits untouched.
> christoph@fujitsu-haswell:~$ su
> setgid: Operation not permitted
Did you initialize by running a program to fill your pI?
-serge
next prev parent reply other threads:[~2015-02-26 15:35 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-05 21:56 [PATCH] capabilities: Ambient capability set V1 Christoph Lameter
2015-02-23 14:58 ` Christoph Lameter
2015-02-23 15:44 ` Andy Lutomirski
2015-02-23 15:53 ` Christoph Lameter
2015-02-23 15:59 ` Andy Lutomirski
2015-02-23 16:41 ` Christoph Lameter
2015-02-23 23:51 ` Andy Lutomirski
2015-02-24 15:48 ` Christoph Lameter
2015-02-23 16:16 ` Serge Hallyn
2015-02-23 16:33 ` Andy Lutomirski
2015-02-23 16:45 ` Serge E. Hallyn
2015-02-23 16:47 ` Christoph Lameter
2015-02-23 16:44 ` Christoph Lameter
2015-02-23 16:46 ` Serge E. Hallyn
2015-02-23 16:50 ` Christoph Lameter
2015-02-23 18:15 ` Serge Hallyn
2015-02-23 18:27 ` Christoph Lameter
2015-02-24 5:19 ` Serge E. Hallyn
2015-02-24 15:47 ` Serge E. Hallyn
2015-02-24 15:58 ` Christoph Lameter
2015-02-24 16:44 ` Serge Hallyn
2015-02-24 17:28 ` Christoph Lameter
2015-02-25 3:32 ` Serge Hallyn
2015-02-25 20:25 ` Christoph Lameter
2015-02-26 15:35 ` Serge E. Hallyn [this message]
2015-02-26 18:28 ` Christoph Lameter
2015-02-26 19:32 ` Serge E. Hallyn
2015-02-26 19:38 ` Andy Lutomirski
2015-02-26 20:16 ` Christoph Lameter
2015-02-26 20:33 ` Serge E. Hallyn
2015-02-26 20:13 ` Christoph Lameter
2015-02-26 20:34 ` Serge E. Hallyn
2015-02-26 20:51 ` Andy Lutomirski
2015-02-26 20:55 ` Serge E. Hallyn
2015-02-26 20:58 ` Andy Lutomirski
2015-02-26 21:19 ` Serge E. Hallyn
2015-02-26 21:29 ` Christoph Lameter
2015-02-26 21:09 ` Christoph Lameter
2015-02-26 21:13 ` Serge E. Hallyn
2015-02-26 21:23 ` Christoph Lameter
2015-02-26 21:32 ` Serge E. Hallyn
2015-02-26 21:37 ` Christoph Lameter
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