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On 03/11/2011 09:47 PM, Maria Iano wrote:
On Mar 11, 2011, at 12:10 PM, Dominick Grift wrote:
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> 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)
>
>
I added those lines to my .te file and got this error:
[root@eng-vocdeviodb01 ~]# make -f /usr/share/selinux/devel/Makefile
ngiodb.pp
Compiling targeted ngiodb module
/usr/bin/checkmodule: loading policy configuration from tmp/ngiodb.tmp
ngiodb.te:117:ERROR 'unknown class fd used in rule' at token ';' on line
93504:
allow rgmanager_t unconfined_t:fd use;
#line 117
/usr/bin/checkmodule: error(s) encountered while parsing configuration
make: *** [tmp/ngiodb.mod] Error 1
Am I doing something wrong?
No its probably some el5 quirk. Looks like you would need to require
class fd use;
But i bet that after that then compiler will complain about other
required classes as well.
instead, for now, forget about this solution and try dwalsh'
"mcs_killall(rgmanager_t) solution first. I think that is a bit more
suitable, and if that is not the case we can always resort to my
solution described above later.
echo "policy_module(myrgmanager, 1.0.0) gen_require(\` type rgmanager_t;
') mcs_killall(rgmanager_t)" > myrgmanager.te;
make -f /usr/share/selinux/devel/Makefile myrgmanager.pp
sudo semodule -i myrgmanager.pp
Thanks,
Maria
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