linux-kernel - Re: [PATCH 08/28] SECURITY: Allow kernel services to override LSM settings for task actions [try #2]

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Date:	Mon, 14 Jan 2008 14:06:17 +0000
From:	David Howells <dhowells@...hat.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	dhowells@...hat.com, Stephen Smalley <sds@...ho.nsa.gov>,
	Daniel J Walsh <dwalsh@...hat.com>, casey@...aufler-ca.com,
	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH 08/28] SECURITY: Allow kernel services to override LSM settings for task actions [try #2]

David Howells <dhowells@...hat.com> wrote:

> Okay...  It looks like I want four security operations/hooks for cachefiles:

FYI, I added the following vectors:

	# kernel services that need to override task security
	class kernel_service
	{
		use_as_override
		create_files_as
	}

The first allows:

	avc_has_perm(daemon_tsec->sid, nominated_sid,
		     SECCLASS_KERNEL_SERVICE,
		     KERNEL_SERVICE__USE_AS_OVERRIDE,
		     NULL);

And the second something like:

	avc_has_perm(tsec->sid, inode->sid,
		     SECCLASS_KERNEL_SERVICE,
		     KERNEL_SERVICE__CREATE_FILES_AS,
		     NULL);

Rather than specifically dedicating them to the cache, I made them general.

David
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