From: Christoph Lameter <cl@linux.com>
To: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.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 12:28:30 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.11.1502261224580.7451@gentwo.org> (raw)
In-Reply-To: <20150226153524.GC15182@mail.hallyn.com>
On Thu, 26 Feb 2015, Serge E. Hallyn wrote:
> > 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
fE does not exist in cpu_vfs_cap_data. We only get fI and fP. Why in the
world does setcap allow setting fE?
V1 does not use fE. In my newer attempt, I seemed to have worked
with zeroed field that I assumed was filled in.
I will just do
pE' = pP'
Ok?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
To: "Serge E. Hallyn" <serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org>
Cc: Serge Hallyn
<serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org>,
Serge Hallyn
<serge.hallyn-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Aaron Jones
<aaronmdjones-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Ted Ts'o <tytso-3s7WtUTddSA@public.gmane.org>,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
akpm-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
"Andrew G. Morgan"
<morgan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mimi Zohar
<zohar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Austin S Hemmelgarn
<ahferroin7-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Markku Savela <msa-kXoF896ld44xHbG02/KK1g@public.gmane.org>,
Jarkko Sakkinen
<jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Michael Kerrisk
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Jonathan Corbet <corbet-T1hC0tSOHrs@public.gmane.org>
Subject: Re: [PATCH] capabilities: Ambient capability set V1
Date: Thu, 26 Feb 2015 12:28:30 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.11.1502261224580.7451@gentwo.org> (raw)
In-Reply-To: <20150226153524.GC15182-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
On Thu, 26 Feb 2015, Serge E. Hallyn wrote:
> > 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
fE does not exist in cpu_vfs_cap_data. We only get fI and fP. Why in the
world does setcap allow setting fE?
V1 does not use fE. In my newer attempt, I seemed to have worked
with zeroed field that I assumed was filled in.
I will just do
pE' = pP'
Ok?
next prev parent reply other threads:[~2015-02-26 18:28 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-05 21:56 [PATCH] capabilities: Ambient capability set V1 Christoph Lameter
2015-02-05 21:56 ` Christoph Lameter
2015-02-23 14:58 ` 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 15:53 ` 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 16:45 ` Serge E. Hallyn
2015-02-23 16:47 ` Christoph Lameter
2015-02-23 16:44 ` 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 15:47 ` 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
2015-02-25 20:25 ` Christoph Lameter
2015-02-26 15:35 ` Serge E. Hallyn
2015-02-26 18:28 ` Christoph Lameter [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 20:16 ` Christoph Lameter
2015-02-26 20:33 ` Serge E. Hallyn
2015-02-26 20:13 ` Christoph Lameter
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 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 21:13 ` 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.DEB.2.11.1502261224580.7451@gentwo.org \
--to=cl@linux.com \
--cc=aaronmdjones@gmail.com \
--cc=ahferroin7@gmail.com \
--cc=akpm@linuxfoundation.org \
--cc=corbet@lwn.net \
--cc=jarkko.sakkinen@linux.intel.com \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=morgan@kernel.org \
--cc=msa@moth.iki.fi \
--cc=mtk.manpages@gmail.com \
--cc=serge.hallyn@canonical.com \
--cc=serge.hallyn@ubuntu.com \
--cc=serge@hallyn.com \
--cc=tytso@mit.edu \
--cc=zohar@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.