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From: Casey Schaufler <casey@schaufler-ca.com>
To: Stephen Smalley <sds@tycho.nsa.gov>, casey@schaufler-ca.com
Cc: David Howells <dhowells@redhat.com>,
	torvalds@osdl.org, akpm@osdl.org, steved@redhat.com,
	trond.myklebust@fys.uio.no, linux-fsdevel@vger.kernel.org,
	linux-cachefs@redhat.com, nfsv4@linux-nfs.org,
	linux-kernel@vger.kernel.org, selinux@tycho.nsa.gov,
	LSM List <linux-security-module@vger.kernel.org>
Subject: Re: [PATCH 00/16] Permit filesystem local caching [try #3]
Date: Wed, 15 Aug 2007 09:30:42 -0700 (PDT)	[thread overview]
Message-ID: <18318.47287.qm@web36611.mail.mud.yahoo.com> (raw)
In-Reply-To: <1187113368.26008.226.camel@moss-spartans.epoch.ncsc.mil>


--- Stephen Smalley <sds@tycho.nsa.gov> wrote:

> On Tue, 2007-08-14 at 08:53 -0700, Casey Schaufler wrote:
> > --- David Howells <dhowells@redhat.com> wrote:
> > 
> > > Casey Schaufler <casey@schaufler-ca.com> wrote:
> > > 
> > > > With Smack you can leave the label alone, raise CAP_MAC_OVERRIDE,
> > > > do your business of setting the label correctly, and then drop
> > > > the capability. No new hooks required.
> > > 
> > > That sounds like a contradiction.  How can you both leave it alone and
> set
> > > it?
> > 
> > Whoops, sorry. You leave the process label alone and explicitly
> > set the file label using the xattr interfaces.
> 
> xattr interfaces don't help with the initial labeling of the file when
> it is created.

That's true. The deamon needs to run with an appropriate label.
I don't believe that this is situation with a really simple solution
because the activity being performed is unusual. 
 
> -- 
> Stephen Smalley
> National Security Agency
> 
> 
> --
> This message was distributed to subscribers of the selinux mailing list.
> If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
> the words "unsubscribe selinux" without quotes as the message.
> 
> 
> 


Casey Schaufler
casey@schaufler-ca.com

--
This message was distributed to subscribers of the selinux mailing list.
If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
the words "unsubscribe selinux" without quotes as the message.

WARNING: multiple messages have this Message-ID (diff)
From: Casey Schaufler <casey@schaufler-ca.com>
To: Stephen Smalley <sds@tycho.nsa.gov>, casey@schaufler-ca.com
Cc: David Howells <dhowells@redhat.com>,
	torvalds@osdl.org, akpm@osdl.org, steved@redhat.com,
	trond.myklebust@fys.uio.no, linux-fsdevel@vger.kernel.org,
	linux-cachefs@redhat.com, nfsv4@linux-nfs.org,
	linux-kernel@vger.kernel.org, selinux@tycho.nsa.gov,
	LSM List <linux-security-module@vger.kernel.org>
Subject: Re: [PATCH 00/16] Permit filesystem local caching [try #3]
Date: Wed, 15 Aug 2007 09:30:42 -0700 (PDT)	[thread overview]
Message-ID: <18318.47287.qm@web36611.mail.mud.yahoo.com> (raw)
In-Reply-To: <1187113368.26008.226.camel@moss-spartans.epoch.ncsc.mil>


--- Stephen Smalley <sds@tycho.nsa.gov> wrote:

> On Tue, 2007-08-14 at 08:53 -0700, Casey Schaufler wrote:
> > --- David Howells <dhowells@redhat.com> wrote:
> > 
> > > Casey Schaufler <casey@schaufler-ca.com> wrote:
> > > 
> > > > With Smack you can leave the label alone, raise CAP_MAC_OVERRIDE,
> > > > do your business of setting the label correctly, and then drop
> > > > the capability. No new hooks required.
> > > 
> > > That sounds like a contradiction.  How can you both leave it alone and
> set
> > > it?
> > 
> > Whoops, sorry. You leave the process label alone and explicitly
> > set the file label using the xattr interfaces.
> 
> xattr interfaces don't help with the initial labeling of the file when
> it is created.

That's true. The deamon needs to run with an appropriate label.
I don't believe that this is situation with a really simple solution
because the activity being performed is unusual. 
 
> -- 
> Stephen Smalley
> National Security Agency
> 
> 
> --
> This message was distributed to subscribers of the selinux mailing list.
> If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
> the words "unsubscribe selinux" without quotes as the message.
> 
> 
> 


Casey Schaufler
casey@schaufler-ca.com

WARNING: multiple messages have this Message-ID (diff)
From: Casey Schaufler <casey@schaufler-ca.com>
To: Stephen Smalley <sds@tycho.nsa.gov>, casey@schaufler-ca.com
Cc: akpm@osdl.org, LSM List <linux-security-module@vger.kernel.org>,
	linux-kernel@vger.kernel.org, nfsv4@linux-nfs.org,
	trond.myklebust@fys.uio.no, torvalds@osdl.org,
	linux-cachefs@redhat.com, selinux@tycho.nsa.gov,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 00/16] Permit filesystem local caching [try #3]
Date: Wed, 15 Aug 2007 09:30:42 -0700 (PDT)	[thread overview]
Message-ID: <18318.47287.qm@web36611.mail.mud.yahoo.com> (raw)
In-Reply-To: <1187113368.26008.226.camel@moss-spartans.epoch.ncsc.mil>


--- Stephen Smalley <sds@tycho.nsa.gov> wrote:

> On Tue, 2007-08-14 at 08:53 -0700, Casey Schaufler wrote:
> > --- David Howells <dhowells@redhat.com> wrote:
> > 
> > > Casey Schaufler <casey@schaufler-ca.com> wrote:
> > > 
> > > > With Smack you can leave the label alone, raise CAP_MAC_OVERRIDE,
> > > > do your business of setting the label correctly, and then drop
> > > > the capability. No new hooks required.
> > > 
> > > That sounds like a contradiction.  How can you both leave it alone and
> set
> > > it?
> > 
> > Whoops, sorry. You leave the process label alone and explicitly
> > set the file label using the xattr interfaces.
> 
> xattr interfaces don't help with the initial labeling of the file when
> it is created.

That's true. The deamon needs to run with an appropriate label.
I don't believe that this is situation with a really simple solution
because the activity being performed is unusual. 
 
> -- 
> Stephen Smalley
> National Security Agency
> 
> 
> --
> This message was distributed to subscribers of the selinux mailing list.
> If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
> the words "unsubscribe selinux" without quotes as the message.
> 
> 
> 


Casey Schaufler
casey@schaufler-ca.com

  reply	other threads:[~2007-08-15 16:30 UTC|newest]

Thread overview: 97+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-10 16:04 [PATCH 00/16] Permit filesystem local caching [try #3] David Howells
2007-08-10 16:04 ` David Howells
2007-08-10 16:05 ` [PATCH 01/16] FS-Cache: Release page->private after failed readahead " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 02/16] FS-Cache: Recruit a couple of page flags for cache management " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 03/16] FS-Cache: Provide an add_wait_queue_tail() function " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 04/16] FS-Cache: Generic filesystem caching facility " David Howells
2007-08-10 16:05 ` [PATCH 05/16] CacheFiles: Add missing copy_page export for ia64 " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 06/16] CacheFiles: Add a hook to write a single page of data to an inode " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 07/16] CacheFiles: Permit the page lock state to be monitored " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 08/16] CacheFiles: Export things for CacheFiles " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 09/16] CacheFiles: Permit a process's create SID to be overridden " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:52   ` Casey Schaufler
2007-08-10 16:52     ` Casey Schaufler
2007-08-10 16:05 ` [PATCH 10/16] CacheFiles: Add an act-as SID override in task_security_struct " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 11/16] CacheFiles: Permit an inode's security ID to be obtained " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:05 ` [PATCH 12/16] CacheFiles: Get the SID under which the CacheFiles module should operate " David Howells
2007-08-10 16:05   ` David Howells
2007-08-10 16:06 ` [PATCH 13/16] CacheFiles: A cache that backs onto a mounted filesystem " David Howells
2007-08-10 16:06 ` [PATCH 14/16] NFS: Use local caching " David Howells
2007-08-10 16:06   ` David Howells
2007-08-10 16:06 ` [PATCH 15/16] NFS: Configuration and mount option changes to enable local caching on NFS " David Howells
2007-08-10 16:06   ` David Howells
2007-08-10 16:06 ` [PATCH 16/16] NFS: Display local caching state " David Howells
2007-08-10 16:06   ` David Howells
2007-08-10 22:13 ` [PATCH 00/16] Permit filesystem local caching " Casey Schaufler
2007-08-10 22:13   ` Casey Schaufler
2007-08-11  8:41   ` David Howells
2007-08-11  8:41     ` David Howells
2007-08-11  8:41     ` David Howells
2007-08-11 15:56     ` Casey Schaufler
2007-08-11 15:56       ` Casey Schaufler
2007-08-13 10:54       ` David Howells
2007-08-13 10:54         ` David Howells
2007-08-13 10:54         ` David Howells
2007-08-13 13:46         ` Casey Schaufler
2007-08-13 13:46           ` Casey Schaufler
2007-08-13 13:46           ` Casey Schaufler
2007-08-13 14:51           ` David Howells
2007-08-13 14:51             ` David Howells
2007-08-13 14:51             ` David Howells
2007-08-13 14:57             ` Stephen Smalley
2007-08-13 14:57               ` Stephen Smalley
2007-08-13 14:57               ` Stephen Smalley
2007-08-13 15:22               ` David Howells
2007-08-13 15:22                 ` David Howells
2007-08-13 15:22                 ` David Howells
2007-08-13 16:20                 ` Casey Schaufler
2007-08-13 16:20                   ` Casey Schaufler
2007-08-13 16:31                   ` David Howells
2007-08-13 16:31                     ` David Howells
2007-08-13 16:31                     ` David Howells
2007-08-13 16:58                     ` Casey Schaufler
2007-08-13 16:58                       ` Casey Schaufler
2007-08-13 16:58                       ` Casey Schaufler
2007-08-13 19:52                       ` David Howells
2007-08-13 19:52                         ` David Howells
2007-08-13 21:44                         ` Casey Schaufler
2007-08-13 21:44                           ` Casey Schaufler
2007-08-14  9:39                           ` David Howells
2007-08-14  9:39                             ` David Howells
2007-08-14  9:39                             ` David Howells
2007-08-14 15:53                             ` Casey Schaufler
2007-08-14 15:53                               ` Casey Schaufler
2007-08-14 17:42                               ` Stephen Smalley
2007-08-14 17:42                                 ` Stephen Smalley
2007-08-14 17:42                                 ` Stephen Smalley
2007-08-15 16:30                                 ` Casey Schaufler [this message]
2007-08-15 16:30                                   ` Casey Schaufler
2007-08-15 16:30                                   ` Casey Schaufler
2007-08-14 17:58                               ` David Howells
2007-08-14 17:58                                 ` David Howells
2007-08-14 17:58                                 ` David Howells
2007-08-14 17:50                           ` Stephen Smalley
2007-08-14 17:50                             ` Stephen Smalley
2007-08-14 17:50                             ` Stephen Smalley
2007-08-13 15:42               ` Casey Schaufler
2007-08-13 15:42                 ` Casey Schaufler
2007-08-13 15:42                 ` Casey Schaufler
2007-08-13 13:50         ` Stephen Smalley
2007-08-13 13:50           ` Stephen Smalley
2007-08-13 13:50           ` Stephen Smalley
2007-08-13 15:10           ` Casey Schaufler
2007-08-13 15:10             ` Casey Schaufler
2007-08-13 15:10             ` Casey Schaufler
2007-08-13 13:01       ` Stephen Smalley
2007-08-13 13:01         ` Stephen Smalley
2007-08-13 13:01         ` Stephen Smalley

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