SELinux is preventing /usr/sbin/groupadd from 'write' accesses on the file /dev/null.

*****  Plugin catchall (50.5 confidence) suggests  ***************************

If you believe that groupadd should be allowed write access on the null file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep groupadd /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

*****  Plugin leaks (50.5 confidence) suggests  ******************************

If you want to ignore groupadd trying to write access the null file, because you believe it should not need this access.
Then you should report this as a bug.  
You can generate a local policy module to dontaudit this access.
Do
# grep /usr/sbin/groupadd /var/log/audit/audit.log | audit2allow -D -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:system_r:groupadd_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:device_t:s0
Target Objects                /dev/null [ file ]
Source                        groupadd
Source Path                   /usr/sbin/groupadd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           shadow-utils-4.1.4.2-11.fc15
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.16-21.fc15
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 2.6.38.5-22.fc15.i686 #1 SMP
                              Mon May 2 20:17:28 UTC 2011 i686 i686
Alert Count                   2
First Seen                    Thu 05 May 2011 03:15:06 PM WEST
Last Seen                     Thu 05 May 2011 03:15:06 PM WEST
Local ID                      7bd7fd54-70a0-4abd-bf4f-55e2196b7a00

Raw Audit Messages
type=AVC msg=audit(1304604906.907:121): avc:  denied  { write } for  pid=16395 comm="groupadd" path="/dev/null" dev=sda1 ino=203 scontext=unconfined_u:system_r:groupadd_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:device_t:s0 tclass=file


type=SYSCALL msg=audit(1304604906.907:121): arch=i386 syscall=execve success=yes exit=0 a0=84b9e38 a1=84b8f88 a2=84b8780 a3=84b8f88 items=0 ppid=16391 pid=16395 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm=groupadd exe=/usr/sbin/groupadd subj=unconfined_u:system_r:groupadd_t:s0-s0:c0.c1023 key=(null)

Hash: groupadd,groupadd_t,device_t,file,write

audit2allow

#============= groupadd_t ==============
allow groupadd_t device_t:file write;

audit2allow -R

#============= groupadd_t ==============
allow groupadd_t device_t:file write;