On Tue, 10 Nov 2015, Theodore Ts'o wrote:
> If you want to create a patch, my recommendation would be to do one
> that turns off ambient capabilities as a CONFIG option, and hide it
> under CONFIG_EXPERT. Or maybe adding a new securebit which disables
> ambient capabilities. Whether or not that will be acceptable
> upstream, I don't know, mainly because I think a strong case can be
That is already available and was submitted with the patch.
commit 746bf6d64275be0c65b0631d8a72b16f1454cfa1
Author: Andy Lutomirski <l...@kernel.org>
Date: Fri Sep 4 15:42:51 2015 -0700
capabilities: add a securebit to disable PR_CAP_AMBIENT_RAISE
Per Andrew Morgan's request, add a securebit to allow admins to disable
PR_CAP_AMBIENT_RAISE. This securebit will prevent processes from adding
capabilities to their ambient set.
For simplicity, this disables PR_CAP_AMBIENT_RAISE entirely rather than
just disabling setting previously cleared bits.
Signed-off-by: Andy Lutomirski <l...@kernel.org>
Acked-by: Andrew G. Morgan <mor...@kernel.org>
Acked-by: Serge Hallyn <serge.hal...@canonical.com>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Christoph Lameter <c...@linux.com>
Cc: Serge Hallyn <serge.hal...@canonical.com>
Cc: Jonathan Corbet <cor...@lwn.net>
Cc: Aaron Jones <aaronmdjo...@gmail.com>
Cc: Ted Ts'o <ty...@mit.edu>
Cc: Andrew G. Morgan <mor...@kernel.org>
Cc: Mimi Zohar <zo...@linux.vnet.ibm.com>
Cc: Austin S Hemmelgarn <ahferro...@gmail.com>
Cc: Markku Savela <m...@moth.iki.fi>
Cc: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
Cc: Michael Kerrisk <mtk.manpa...@gmail.com>
Cc: James Morris <james.l.mor...@oracle.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
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