From: James Morris <jmorris@namei.org>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: "David P. Quigley" <dpquigl@tycho.nsa.gov>,
hch@infradead.org, viro@zeniv.linux.org.uk,
casey@schaufler-ca.com, sds@tycho.nsa.gov,
matthew.dodd@sparta.com, trond.myklebust@fys.uio.no,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org, selinux@tycho.nsa.gov,
linux-nfs@vger.kernel.org
Subject: Re: [PATCH 06/10] NFSv4: Add label recommended attribute and NFSv4 flags
Date: Thu, 8 Jul 2010 09:30:08 +1000 (EST) [thread overview]
Message-ID: <alpine.LRH.2.00.1007080928180.14102@tundra.namei.org> (raw)
In-Reply-To: <20100707170058.GD28815@fieldses.org>
On Wed, 7 Jul 2010, J. Bruce Fields wrote:
> On Wed, Jul 07, 2010 at 10:31:22AM -0400, David P. Quigley wrote:
>
> > +#define NFS4_MAXLABELLEN 4096
>
> Idle curiosity--why 4096? (Why couldn't it be 16? And how do we know
> people will never want 8192?)
I think I raised this a while back, too.
The maximum security label size on Linux is:
#define XATTR_SIZE_MAX 65536
Why arbitrarily limit this over the network?
Someone could have a valid local security label which can't be conveyed
via NFS.
- James
--
James Morris
<jmorris@namei.org>
WARNING: multiple messages have this Message-ID (diff)
From: James Morris <jmorris@namei.org>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: "David P. Quigley" <dpquigl@tycho.nsa.gov>,
hch@infradead.org, viro@zeniv.linux.org.uk,
casey@schaufler-ca.com, sds@tycho.nsa.gov,
matthew.dodd@sparta.com, trond.myklebust@fys.uio.no,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org, selinux@tycho.nsa.gov,
linux-nfs@vger.kernel.org
Subject: Re: [PATCH 06/10] NFSv4: Add label recommended attribute and NFSv4 flags
Date: Thu, 8 Jul 2010 09:30:08 +1000 (EST) [thread overview]
Message-ID: <alpine.LRH.2.00.1007080928180.14102@tundra.namei.org> (raw)
In-Reply-To: <20100707170058.GD28815@fieldses.org>
On Wed, 7 Jul 2010, J. Bruce Fields wrote:
> On Wed, Jul 07, 2010 at 10:31:22AM -0400, David P. Quigley wrote:
>
> > +#define NFS4_MAXLABELLEN 4096
>
> Idle curiosity--why 4096? (Why couldn't it be 16? And how do we know
> people will never want 8192?)
I think I raised this a while back, too.
The maximum security label size on Linux is:
#define XATTR_SIZE_MAX 65536
Why arbitrarily limit this over the network?
Someone could have a valid local security label which can't be conveyed
via NFS.
- James
--
James Morris
<jmorris@namei.org>
--
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next prev parent reply other threads:[~2010-07-07 23:30 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-07 14:31 Labeled-NFS: Security Label support in NFSv4 David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 01/10] Security: Add hook to calculate context based on a negative dentry David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-08 12:51 ` Stephen Smalley
2010-07-08 12:51 ` Stephen Smalley
2010-07-07 14:31 ` [PATCH 02/10] Security: Add Hook to test if the particular xattr is part of a MAC model David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 16:49 ` J. Bruce Fields
2010-07-07 16:49 ` J. Bruce Fields
2010-07-07 14:31 ` [PATCH 03/10] LSM: Add flags field to security_sb_set_mnt_opts for in kernel mount data David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 04/10] SELinux: Add new labeling type native labels David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 23:23 ` James Morris
2010-07-07 23:23 ` James Morris
2010-07-08 13:31 ` David P. Quigley
2010-07-08 13:31 ` David P. Quigley
2010-07-08 22:33 ` James Morris
2010-07-08 22:33 ` James Morris
2010-07-09 14:09 ` David P. Quigley
2010-07-09 14:09 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 05/10] KConfig: Add KConfig entries for Labeled NFS David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 16:56 ` J. Bruce Fields
2010-07-07 16:56 ` J. Bruce Fields
2010-07-07 17:05 ` David P. Quigley
2010-07-07 17:05 ` David P. Quigley
2010-07-07 17:05 ` David P. Quigley
2010-07-07 17:53 ` Chuck Lever
2010-07-07 17:53 ` Chuck Lever
2010-07-07 14:31 ` [PATCH 06/10] NFSv4: Add label recommended attribute and NFSv4 flags David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 17:00 ` J. Bruce Fields
2010-07-07 23:30 ` James Morris [this message]
2010-07-07 23:30 ` James Morris
2010-07-08 13:39 ` David P. Quigley
2010-07-08 13:39 ` David P. Quigley
2010-07-08 13:39 ` David P. Quigley
2010-07-08 13:39 ` David P. Quigley
2010-07-08 22:48 ` James Morris
2010-07-08 22:48 ` James Morris
2010-07-09 13:47 ` Stephen Smalley
2010-07-09 13:47 ` Stephen Smalley
2010-07-09 13:47 ` Stephen Smalley
2010-07-09 14:05 ` David P. Quigley
2010-07-09 14:05 ` David P. Quigley
2010-07-09 14:05 ` David P. Quigley
2010-07-11 5:02 ` Kyle Moffett
2010-07-11 5:02 ` Kyle Moffett
2010-07-11 5:02 ` Kyle Moffett
2010-07-11 5:02 ` Kyle Moffett
2010-07-11 5:12 ` Casey Schaufler
2010-07-11 5:12 ` Casey Schaufler
2010-07-11 5:12 ` Casey Schaufler
2010-07-12 14:36 ` Stephen Smalley
2010-07-12 14:36 ` Stephen Smalley
2010-07-17 0:09 ` Kyle Moffett
2010-07-17 0:09 ` Kyle Moffett
2010-07-17 0:09 ` Kyle Moffett
2010-07-17 0:09 ` Kyle Moffett
2010-07-07 14:31 ` [PATCH 07/10] NFSv4: Introduce new label structure David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 16:01 ` Chuck Lever
2010-07-07 16:21 ` Casey Schaufler
2010-07-07 16:21 ` Casey Schaufler
2010-07-07 16:21 ` Casey Schaufler
2010-07-07 16:24 ` David P. Quigley
2010-07-07 16:24 ` David P. Quigley
2010-07-07 16:24 ` David P. Quigley
2010-07-07 17:42 ` Chuck Lever
2010-07-07 17:42 ` Chuck Lever
2010-07-07 16:22 ` David P. Quigley
2010-07-07 16:22 ` David P. Quigley
2010-07-07 16:22 ` David P. Quigley
2010-07-07 17:49 ` Chuck Lever
2010-07-07 18:11 ` David P. Quigley
2010-07-07 18:11 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 08/10] NFS: Client implementation of Labeled-NFS David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 09/10] NFS: Extend NFS xattr handlers to accept the security namespace David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 14:31 ` [PATCH 10/10] NFSD: Server implementation of MAC Labeling David P. Quigley
2010-07-07 14:31 ` David P. Quigley
2010-07-07 17:21 ` J. Bruce Fields
2010-07-07 18:03 ` David P. Quigley
2010-07-07 18:03 ` David P. Quigley
2010-07-07 18:03 ` David P. Quigley
2010-07-07 19:24 ` J. Bruce Fields
2010-07-08 13:27 ` David P. Quigley
2010-07-08 13:27 ` David P. Quigley
-- strict thread matches above, loose matches on Subject: below --
2010-06-08 16:22 Labeled-NFS: Security Label support in NFSv4 David P. Quigley
2010-06-08 16:22 ` [PATCH 06/10] NFSv4: Add label recommended attribute and NFSv4 flags David P. Quigley
2010-06-08 16:22 ` David P. Quigley
2010-06-08 16:22 ` David P. Quigley
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