Description of problem:
The Nagios check_procs plugin has a -u option to only check processes belonging to a named user. It consequently needs to read /etc/passwd. However, SELinux prevents it from doing this.

Version-Release number of selected component (if applicable):
selinux-policy-targeted-3.10.0-125.fc17.noarch
nagios-plugins-procs-1.4.15-5.fc17.x86_64

How reproducible:
Always.

Steps to Reproduce:
1. Set up the Nagios check_procs plugin on a Fedora 17 machine; I install nrpe, and add the following to /etc/nagios/nrpe.cfg:
command[check_ntpd]=/usr/lib64/nagios/plugins/check_procs -u ntp -C ntpd -w 1:1 -c 1:1

2. Check the plugin (I run on my Nagios server "/usr/lib64/nagios/plugins/check_nrpe -H <f17machine> -c check_ntpd")

Actual results:

AVC on the Fedora 17 machine:
May 30 17:09:42 f17machine kernel: [ 1887.911663] type=1400 audit(1338422982.262:48): avc:  denied  { read } for  pid=11373 comm="check_procs" name="passwd" dev="sda1" ino=421537 scontext=system_u:system_r:nagios_system_plugin_t:s0 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file

check_nrpe on the Nagios server fails with:
check_procs: User name was not found - ntp


Expected results:
No AVC; Nagios server reports:
PROCS OK: 1 process with UID = 38 (ntp), command name 'ntpd'


Additional info:
Temporary workaround:
chcon -t nagios_unconfined_plugin_exec_t /usr/lib64/nagios/plugins/check_procs