help adding a type attribute to a domain

[Maria Iano]

On Mar 11, 2011, at 12:09 PM, Miroslav Grepl wrote:

> On 03/11/2011 04:03 PM, Dominick Grift wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> On 03/11/2011 04:57 PM, Maria Iano wrote:
>>> I'm getting a denial that audit2why says is due to constraints.
>>> Sesearch does show that the action has an allow rule.
>>>
>>> Here are the audit messages:
>>>
>>> host=eng-vocngcn03.eng.gci type=AVC  
>>> msg=audit(1299844473.770:740848):
>>> avc:  denied  { sigkill } for  pid=22927 comm="kill"
>>> scontext=system_u:system_r:rgmanager_t:s0
>>> tcontext=system_u:system_r:unconfined_t:s0-s0:c0.c1023  
>>> tclass=process
>>>
>>> host=eng-vocngcn03.eng.gci type=SYSCALL
>>> msg=audit(1299844473.770:740848): arch=c000003e syscall=62  
>>> success=yes
>>> exit=0 a0=19ba a1=9 a2=9 a3=0 items=0 ppid=20173 pid=22927
>>> auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0
>>> fsgid=0 tty=(none) ses=4294967295 comm="kill" exe="/bin/kill"
>>> subj=system_u:system_r:rgmanager_t:s0 key=(null)
>>>
>>> Here is the result of running sesearch on that same server:
>>>
>>> [root at eng-vocngcn03]# sesearch --allow -s rgmanager_t -t  
>>> unconfined_t -
>>> c process -p sigkill
>>> Found 1 av rules:
>>>     allow rgmanager_t unconfined_t : process { sigchld sigkill };
>>>
>>> Here is what audit2why says:
>>>
>>> [root at eng-vocngcn03]# echo 'host=eng-vocngcn03.eng.gci type=AVC
>>> msg=audit(1299844473.770:740848): avc:  denied  { sigkill } for
>>> pid=22927 comm="kill" scontext=system_u:system_r:rgmanager_t:s0
>>> tcontext=system_u:system_r:unconfined_t:s0-s0:c0.c1023  
>>> tclass=process'
>>> | audit2why
>>> host=eng-vocngcn03.eng.gci type=AVC  
>>> msg=audit(1299844473.770:740848):
>>> avc:  denied  { sigkill } for  pid=22927 comm="kill"
>>> scontext=system_u:system_r:rgmanager_t:s0
>>> tcontext=system_u:system_r:unconfined_t:s0-s0:c0.c1023  
>>> tclass=process
>>>          Was caused by:
>>>                  Constraint violation.
>>>                  Check policy/constraints.
>>>                  Typically, you just need to add a type attribute to
>>> the domain to satisfy the constraint.
>>>
>>> This is a RHEL 5.5 server and it doesn't have the policy source  
>>> and I
>>> don't see an rpm available with that. I can't find a constraints  
>>> file,
>>> and I assume that's because it doesn't have the source. I'm trying  
>>> to
>>> work out how to add the necessary type attribute to the domain. I do
>>> have a custom policy on the system. It's very long so I'll include  
>>> the
>>> relevant pieces:
>>>
>>> require {
>>>          type rgmanager_t;
>>>          type unconfined_t;
>>>          class process { sigkill signal };
>>> ...<snip>...
>>> }
>>>
>>> allow rgmanager_t unconfined_t:process sigkill;
>>> ...<snip>...
>>>
>>> Is there something I can add to my policy to resolve the constraints
>>> issue?
>> What is that process running in the unconfined_t domain?
>> What is your distro?
>> Looks to be an mcs constrained.
>>
> What were you doing with rgmanager when this happened?
>

 From the logs it looks as though an automated process logged in over  
ssh and did something but I don't know what the process does. I'm  
trying to find out but the vendor is overseas so I don't know how soon  
I'll hear back.