[redhat-lspp] mls constraint issue in the java_t domain

[Stephen Smalley]

On Fri, 2007-05-25 at 17:26 -0700, Clarkson, Mike R (US SSA) wrote:
> I've got the following AVC denial message that I can't get past:
> 
> type=AVC msg=audit(1180136666.749:225351): avc:  denied  { write } for
> pid=6603 comm="java" name="3" dev=devpts ino=5
> scontext=m252_u:system_r:java_t:s15:c0.c255
> tcontext=m252_u:object_r:devpts_t:s0 tclass=chr_file
> 
> The corresponding output from audit2allow is:
> 
> [root at m252ut5 foo]# audit2allow -i /var/log/audit/audit.log -l -v -r
> 
> require {
>         class chr_file write;
>         class dir write;
>         type devpts_t;
>         type java_t;
>         type tmp_t;
>         role system_r;
> };
> 
> allow java_t devpts_t:chr_file write;
>         #TYPE=AVC  MSG=audit(1180136666.749:225351):  COMM="java"
> NAME="3"   : write
>         #TYPE=AVC  MSG=audit(1180136666.749:225351):  COMM="java"
> NAME="3"   : write
>         #TYPE=AVC  MSG=audit(1180136666.749:225351):  COMM="java"
> NAME="3"   : write
>         #TYPE=AVC  MSG=audit(1180136666.749:225351):  COMM="java"
> NAME="3"   : write
> allow java_t tmp_t:dir write;
>         #TYPE=AVC  MSG=audit(1180136666.757:225352):  COMM="java"
> NAME="hsperfdata_mbean"   : write
> 
> 
> This is an mls constraint issue because if I use "runcon -l s0 ..." (or
> equivalently remove the runcon statement) rather than "runcon -l
> s15:c0.c255 ...", everything works fine.
> 
> The two things that I would think are needed to allow this are:
> 	allow java_t devpts_t:chr_file write;
> 	mls_file_write_down(java_t)
> I've provided both of these. (I recognize that giving java_t write down
> privilege is not a good idea. This is just a temporary solution for demo
> purposes until we can get all of our domains set up properly.)
> 
> Any ideas for what I need to do to get past this AVC denial?

Use newrole -l, and it will relabel the pty for you.

-- 
Stephen Smalley
National Security Agency