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Re: help adding a type attribute to a domain



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On 03/11/2011 06:25 PM, Maria Iano wrote:
> 
> On Mar 11, 2011, at 12:12 PM, Dominick Grift wrote:
> 
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>> On 03/11/2011 06:10 PM, Dominick Grift wrote:
>>> On 03/11/2011 06:04 PM, Maria Iano wrote:
>>>
>>>> On Mar 11, 2011, at 11:48 AM, Dominick Grift wrote:
>>>
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>>>>> On 03/11/2011 05:42 PM, Daniel J Walsh wrote:
>>>>>> On 03/11/2011 10:57 AM, 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)
>>>>>>
>>>>>> You have rgmanager sending a kill signal to a process running as
>>>>>> unconfined_t
>>>>>
>>>>> There is no proof that its rgmanager doing that imho. Since
>>>>> rgmanager_t
>>>>> is an unconfined_domain it could be any generic application started
>>>>> by a
>>>>> process running in the rgmanager_t domain (eventually started by
>>>>> rgmanager)
>>>>>
>>>
>>>> We have red hat clustering running on the server, and the clustering
>>>> processes are running as rgmanager_t. When we move a service off the
>>>> server to another node, the clustering software calls a vendor  
>>>> script
>>>> like the red hat init.d scripts, with the stop command. That vendor
>>>> script calls another script which is a stop script. That stop  
>>>> scripts
>>>> if full of kill commands - that match all running processes against
>>>> various expressions and kill them.
>>>
>>>> We do have a custom policy with a bunch of allow rules but none of
>>>> them allow a domain transition.
>>>
>>> Yes i think i have a reasonable good idea now of what is going on.  
>>> The
>>> easiest solution to the constraint issue would probably be to run
>>> rgmanager_t on s0 - mcs_systemhigh.
>>>
>>> policy_module(myrgmanager, 1.0.0)
>>>
>>> gen_require(`
>>> type rgmanager_t, rgmanager_exec_t;
>>> ')
>>>
>>> init_ranged_daemon_domain(rgmanager_t, rgmanager_exec_t, s0 -
>>> mcs_systemhigh)
>>>
>>> make -f /usr/share/selinux/devel/Makefile myrgmanager.pp
>>> sudo semodule -i myrgmanager.pp
>>>
>>> (may or may not fix the mcs constraint issues)
>>>
>>
>> You would need to restart rgmanager and verify (ps auxZ | grep
>> rgmanager) that it runs on s0-s0:c0.c1023 instead of s0.
>>
> 
> When I run ps auxZ and grep for rgmanager I get 424 processes listed  
> but rgmanager_t only occurs on the left as the context and not in the  
> name of a process. Also none of them give me the s0 info. I've noticed  
> that generally seems to be hidden on my system. Here's the output of  
> one of them:
> 
> system_u:system_r:rgmanager_t   root     29683  0.0  0.0  23544   
> 5136 ?        S<Ls Mar09   0:00 clurgmgrd
> 

odd.. Anyways try to reproduce that avc denial and see if the
rgmanager_t in the avc denial says s0 or s0-s0:c0.c1023

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