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Re: [PATCH 06b/26] Security: Make NFSD work with detached security

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From: David Howells <dhowells@...>
To: J. Bruce Fields <bfields@...>
Cc: <dhowells@...>, <sds@...>, <casey@...>, <Trond.Myklebust@...>, <neilb@...>, <linux-kernel@...>, <selinux@...>, <linux-security-module@...>, <nfs@...>
Subject: Re: [PATCH 06b/26] Security: Make NFSD work with detached security
Date: Thursday, January 17, 2008 - 6:48 pm

J. Bruce Fields <bfields@fieldses.org> wrote:


It involves a kmalloc().  That means an extra possibility for an error.  Plus
it may allow you to cache the result of checking whether, say, SELinux
security labels are allowed to be set when passed over NFS (if such is
possible).

David
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Messages in current thread:
[PATCH 00/26] Permit filesystem local caching, David Howells, (Tue Jan 15, 7:46 pm)
Re: [PATCH 00/26] Permit filesystem local caching, Kyle Moffett, (Tue Jan 15, 10:24 pm)
Re: [PATCH 00/26] Permit filesystem local caching, David Howells, (Wed Jan 16, 12:55 pm)
Re: [PATCH 00/26] Permit filesystem local caching, James Morris, (Tue Jan 15, 9:52 pm)
Re: [PATCH 00/26] Permit filesystem local caching, James Morris, (Tue Jan 15, 8:58 pm)
Re: [PATCH 00/26] Permit filesystem local caching, David Howells, (Wed Jan 16, 12:48 pm)
[PATCH 26/26] NFS: Separate caching by superblock, explicitl..., David Howells, (Tue Jan 15, 7:49 pm)
[PATCH 25/26] NFS: Display local caching state, David Howells, (Tue Jan 15, 7:49 pm)
[PATCH 24/26] NFS: Configuration and mount option changes to..., David Howells, (Tue Jan 15, 7:49 pm)
[PATCH 23/26] NFS: Use local caching, David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 21/26] CacheFiles: A cache that backs onto a mounted ..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 22/26] NFS: Fix memory leak, David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 19/26] CacheFiles: Permit the page lock state to be m..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 20/26] CacheFiles: Export things for CacheFiles, David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 18/26] CacheFiles: Add a hook to write a single page ..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 15/26] FS-Cache: Generic filesystem caching facility, David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 17/26] CacheFiles: Be consistent about the use of map..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 16/26] CacheFiles: Add missing copy_page export for i..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 08/26] Add a secctx_to_secid() LSM hook to go along w..., David Howells, (Tue Jan 15, 7:47 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo..., James Morris, (Tue Jan 15, 9:05 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo..., Paul Moore, (Wed Jan 16, 9:41 am)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo..., James Morris, (Wed Jan 16, 6:13 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo..., Paul Moore, (Wed Jan 16, 6:19 pm)
Re: [PATCH 08/26] Add a secctx_to_secid() LSM hook to go alo..., Casey Schaufler, (Wed Jan 16, 1:08 pm)
[PATCH 13/26] FS-Cache: Recruit a couple of page flags for c..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 12/26] FS-Cache: Release page-&gt;private after faile..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 14/26] FS-Cache: Provide an add_wait_queue_tail() fun..., David Howells, (Tue Jan 15, 7:48 pm)
[PATCH 10/26] Security: Add a kernel_service object class to..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 09/26] Security: Pre-add additional non-caching classes, David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 11/26] Security: Allow kernel services to override LS..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 06/26] Security: Separate task security context from ..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 06b/26] Security: Make NFSD work with detached security, David Howells, (Thu Jan 17, 1:17 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se..., J. Bruce Fields, (Thu Jan 17, 4:48 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se..., David Howells, (Thu Jan 17, 6:48 pm)
Re: [PATCH 06b/26] Security: Make NFSD work with detached se..., David Howells, (Thu Jan 17, 7:02 pm)
[PATCH 06a/26] Extra task_struct -&gt; task_security separation, David Howells, (Thu Jan 17, 1:14 pm)
[PATCH 07/26] Security: De-embed task security record from t..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 05/26] Security: Change current-&gt;fs[ug]id to curre..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 03/26] KEYS: Allow the callout data to be passed as a..., David Howells, (Tue Jan 15, 7:47 pm)
[PATCH 04/26] KEYS: Add keyctl function to get a security la..., David Howells, (Tue Jan 15, 7:47 pm)
Re: [PATCH 04/26] KEYS: Add keyctl function to get a securit..., Stephen Smalley, (Wed Jan 16, 11:47 am)
[PATCH 01/26] KEYS: Increase the payload size when instantia..., David Howells, (Tue Jan 15, 7:46 pm)
[PATCH 02/26] KEYS: Check starting keyring as part of search, David Howells, (Tue Jan 15, 7:47 pm)