Description of problem:
Root is denied write access to files in /proc/<pid>/ which should be writable 
by him, even from an unconfined_t shell.

Version-Release number of selected component (if applicable):
selinux-policy-3.0.8-81.fc8.noarch
selinux-policy-targeted-3.0.8-81.fc8.noarch
kernel-2.6.23.14-107.fc8.x86_64

How reproducible:

Steps to Reproduce:
Login as root. Let's choose a confined process, e.g. hald.:
# cd /proc/$(/sbin/pidof hald)
# ls -l oom_adj
-rw-r--r-- 1 root root 0 Feb  1 16:12 oom_adj
# echo 1 > oom_adj 
bash: oom_adj: Permission denied


Actual results:
Write access is denied, an AVC message is generated:

avc: denied { write } for comm=bash dev=proc egid=0 euid=0 exe=/bin/bash 
exit=-13 fsgid=0 fsuid=0 gid=0 items=0 name=oom_adj pid=5920 
scontext=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 sgid=0 
subj=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 suid=0 tclass=file 
tcontext=system_u:system_r:hald_t:s0 tty=pts3 uid=0


Expected results:
Root should be allowed to tune the processes' writable parameters 
in /proc/<pid>/

Additional info:
The bug prevents the latencytop utility from working correctly with SELinux in 
enforcing mode (latencytop is going through package review: 
https://bugzilla.redhat.com/show_bug.cgi?id=431047 ).