Description of problem:
SELinux is preventing cat from 'read' accesses on the file last_pwr.

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

If you believe that cat should be allowed read access on the last_pwr 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:
# ausearch -c 'cat' --raw | audit2allow -M my-cat
# semodule -X 300 -i my-cat.pp

Additional Information:
Source Context                system_u:system_r:tlp_t:s0
Target Context                system_u:object_r:var_run_t:s0
Target Objects                last_pwr [ file ]
Source                        cat
Source Path                   cat
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.2-35.fc29.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.18.11-301.fc29.x86_64 #1 SMP Mon
                              Oct 1 13:47:10 UTC 2018 x86_64 x86_64
Alert Count                   2
First Seen                    2018-10-05 11:44:23 CEST
Last Seen                     2018-10-05 16:56:12 CEST
Local ID                      4d1c107b-4537-4ec3-89d7-be03708990c1

Raw Audit Messages
type=AVC msg=audit(1538751372.360:251): avc:  denied  { read } for  pid=2295 comm="cat" name="last_pwr" dev="tmpfs" ino=33299 scontext=system_u:system_r:tlp_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=0


Hash: cat,tlp_t,var_run_t,file,read

Version-Release number of selected component:
selinux-policy-3.14.2-35.fc29.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.18.11-301.fc29.x86_64
type:           libreport

Potential duplicate: bug 1564739