linux-kernel - Re: [PATCH v2 1/2] syslog: distinguish between /proc/kmsg and syscalls

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Date:	Thu, 4 Feb 2010 14:52:05 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Kees Cook <kees.cook@...onical.com>
cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	linux-security-module@...r.kernel.org,
	Eric Paris <eparis@...hat.com>,
	David Howells <dhowells@...hat.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Simon Kagstrom <simon.kagstrom@...insight.net>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Robin Getz <rgetz@...log.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Paul Moore <paul.moore@...com>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	Etienne Basset <etienne.basset@...ericable.fr>,
	"David P. Quigley" <dpquigl@...ho.nsa.gov>,
	LKLM <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] syslog: distinguish between /proc/kmsg and
 syscalls

On Wed, 3 Feb 2010, Kees Cook wrote:

> This allows the LSM to distinguish between syslog functions originating
> from /proc/kmsg access and direct syscalls.  By default, the commoncaps
> will now no longer require CAP_SYS_ADMIN to read an opened /proc/kmsg
> file descriptor.  For example the kernel syslog reader can now drop
> privileges after opening /proc/kmsg, instead of staying privileged with
> CAP_SYS_ADMIN.  MAC systems that implement security_syslog have unchanged
> behavior.
> 
> Signed-off-by: Kees Cook <kees.cook@...onical.com>


Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next


-- 
James Morris
<jmorris@...ei.org>
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