help adding a type attribute to a domain

[Daniel J Walsh]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

I would bet this process is running with the wrong domain.  I don't
think you want rgmanager_t sending kill signals to user processes.

What process was it trying to kill?
> 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?
> 
> Thanks,
> Maria
> --
> selinux mailing list
> selinux at lists.fedoraproject.org
> https://admin.fedoraproject.org/mailman/listinfo/selinux
> 
> 

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/

iEYEARECAAYFAk16UQ8ACgkQrlYvE4MpobNa0gCeIA3EzwhJJz5F9igmDig78Yya
ZUkAoKqx6MXSZ/WWfpVr2QuftU7qGAHc
=+ZF7
-----END PGP SIGNATURE-----