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On 02/05/2014 02:03 AM, Jayson Hurst wrote:
> If my daemon creates a file in /tmp which is labelled with my domains tmp
> file context as follows:
>
> -rw-------. 1001 1000 unconfined_u:object_r:qasd_tmp_t:s0
> /tmp/krb5cc_1001
>
> other daemons such as sshd (which use kerberos) will need access to this
> file as well. Is there a way to grant that access from my policy without
> having to specify an exact allow rule for sshd?
>
> I am seeing audit messages about this from audit2why.
>
> type=AVC msg=audit(1391534896.381:2642): avc: denied { getattr } for
> pid=2070 comm="sshd" path="/tmp/krb5cc_1001" dev=dm-0 ino=281219
> scontext=system_u:system_r:sshd_t:s0-s0:c0.c1023
> tcontext=unconfined_u:object_r:qasd_tmp_t:s0 tclass=file
>
> audit2allow gives me the following allow rule:
>
> allow sshd_t qasd_tmp_t:file { getattr unlink };
>
> But I don't want to create specific allow rules like this if I can help
> it.
>
>
>
Well you really want this content to probably be labeled user_tmp_t. One
problem, I see is you are creating content in /tmp that is well known name,
which can be dangerous. In Fedora we are putting this type of content under
/run/user/UID, rather then in /tmp.
You could make a call like setfscreatecon("system_u:object_r:user_tmp_t:s0")
before creating the content.
A file name transition rule would work, but I recommend that you do not create
a guessable name in /tmp.
>
>
> -- selinux mailing list selinux@xxxxxxxxxxxxxxxxxxxxxxx
> https://admin.fedoraproject.org/mailman/listinfo/selinux
>
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