Re: NFS Home Directory Files Mis-Labelled

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On 04/20/2013 01:40 AM, Mike Pinkerton wrote:
[Note: I sent this message yesterday without first subscribing to the list -- intending to check the web archive for responses. Because my message has not yet shown up in the web archive, I subscribed in order to re-send this. My apologies if both messages make it out of the moderation queue.]

Last summer, I set up a network with about a dozen stationary boxes and 15-20 moveable users. All users are authenticating via FreeIPA, and have their home directories NFS-mounted from a central file server. Both the desktop boxes and the file server were running Fedora 16.

+  User home directories were mounted from "/srv/exports/<user_name>".

+  The desktop boxes had SE Linux boolean "use_nfs_home_dirs=1".

+ The file server had "/etc/selinux/targeted/contexts/files/file_contexts.local" with:

    /srv   system_u:object_r:home_root_t:s0

All was working well.

In March, I upgraded all of the desktop boxes, as well as the file server and the FreeIPA server to Fedora 18.

+ User home directories are still mounted from "/srv/exports/<user_name>".

+  The desktop boxes still have SE Linux boolean "use_nfs_home_dirs=1".

+ The file server still has "/etc/selinux/targeted/contexts/files/file_contexts.local" with:

    /srv   system_u:object_r:home_root_t:s0


The problems is that, as some users create files, they are being created with context:

    "system_u:object_r:user_home_t:s0"

rather than:

    "unconfined_u:object_r:user_home_t:s0"

If I run "restorecon -FR /srv" , then the files are re-labelled to the "unconfined_u".

I don't know how frequently files are created with the wrong context.

Any ideas as to what is happening?

Thanks.

Dan wrote a great blog

http://danwalsh.livejournal.com/63586.html

where you can find answers. Basically "unconfined_u" tells you that files have been created by a process running with "unconfined_u:*:*:* context.

Regards,
Miroslav
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