Description of problem:
SELinux is preventing pmdalinux from 'unix_read' accesses on the semaphore Unknown.

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

If you believe that pmdalinux should be allowed unix_read access on the Unknown sem 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:
# ausearch -c 'pmdalinux' --raw | audit2allow -M my-pmdalinux
# semodule -X 300 -i my-pmdalinux.pp

Additional Information:
Source Context                system_u:system_r:pcp_pmcd_t:s0
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                Unknown [ sem ]
Source                        pmdalinux
Source Path                   pmdalinux
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-283.26.fc27.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.15.7-300.fc27.x86_64 #1 SMP Wed
                              Feb 28 17:53:39 UTC 2018 x86_64 x86_64
Alert Count                   21
First Seen                    2018-03-13 16:02:50 CET
Last Seen                     2018-03-13 17:05:50 CET
Local ID                      aaa25239-616e-4bc0-b876-b53271d8b61b

Raw Audit Messages
type=AVC msg=audit(1520957150.386:571): avc:  denied  { unix_read } for  pid=1456 comm="pmdalinux" key=-1591014495  scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=sem permissive=0


Hash: pmdalinux,pcp_pmcd_t,unconfined_t,sem,unix_read

Version-Release number of selected component:
selinux-policy-3.13.1-283.26.fc27.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.3
hashmarkername: setroubleshoot
kernel:         4.15.7-300.fc27.x86_64
type:           libreport