[CentOS] SELinux : please explain ...
Daniel J Walsh
dwalsh at redhat.com
Wed Aug 1 15:45:43 UTC 2012
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On 08/01/2012 04:01 AM, Philippe Naudin wrote:
> Hello,
>
> This is somehow off-topic, since the problem appears on a modified
> CentOS-6.2 (turned into a xen-4.1 host) : I get SELinux errors, and I'm not
> able to understand them.
>
>> From audit2why :
> type=AVC msg=audit(1343724164.898:298772): avc: denied { mac_admin } for
> pid=12399 comm="restore" capability=33
> scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
> tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
> tclass=capability2
>
> ... and from audit2allow : #============= unconfined_t ============== allow
> unconfined_t self:capability2 mac_admin;
>
> I don't know what triggers these records in /var/log/audit (everything
> seems to work). Running retorecon -rv / doesn't produce any error.
>
> Can someone tell me what is the mac_admin functionnality, and if it is safe
> to allow it ? If I understand correctly what I have found by googling
> around, it is not advised.
>
> Thanks,
>
mac_admin means some where you have a command that is trying to set a file
context to something your current policy loaded into the kernel does not
understand.
Something like
touch /tmp/foobar
chcon -t unknownlabel /tmp/foobar
Would cause this AVC.
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