Description of problem:
SELinux is preventing /usr/bin/Xorg from getattr, associate access on the shared memory .

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that Xorg should be allowed getattr associate access on the  shm 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 Xorg /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:xserver_t:s0-s0:c0.c1023
Target Context                system_u:system_r:initrc_t:s0
Target Objects                 [ shm ]
Source                        Xorg
Source Path                   /usr/bin/Xorg
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           xorg-x11-server-Xorg-1.13.3-3.fc18.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.11.1-97.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.9.4-200.fc18.x86_64 #1 SMP Fri
                              May 24 20:10:49 UTC 2013 x86_64 x86_64
Alert Count                   1
First Seen                    2013-05-31 09:47:30 PDT
Last Seen                     2013-05-31 09:47:30 PDT
Local ID                      3154659f-f6c6-4357-8f85-6861f382d16b

Raw Audit Messages
type=AVC msg=audit(1370018850.315:510): avc:  denied  { getattr associate } for  pid=932 comm="Xorg" key=0  scontext=system_u:system_r:xserver_t:s0-s0:c0.c1023 tcontext=system_u:system_r:initrc_t:s0 tclass=shm


type=SYSCALL msg=audit(1370018850.315:510): arch=x86_64 syscall=shmctl success=yes exit=0 a0=a08011 a1=2 a2=7fff2c6bf4c0 a3=28 items=0 ppid=818 pid=932 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=tty1 comm=Xorg exe=/usr/bin/Xorg subj=system_u:system_r:xserver_t:s0-s0:c0.c1023 key=(null)

Hash: Xorg,xserver_t,initrc_t,shm,getattr,associate

audit2allow

#============= xserver_t ==============
allow xserver_t initrc_t:shm { getattr associate };

audit2allow -R
require {
	type xserver_t;
}

#============= xserver_t ==============
xserver_stream_connect(xserver_t)


Additional info:
reporter:       libreport-2.1.4
hashmarkername: setroubleshoot
kernel:         3.9.4-200.fc18.x86_64
type:           libreport