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

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

If si crede che cat dovrebbe avere possibilità di accesso read sui last_pwr file in modo predefinito.
Then si dovrebbe riportare il problema come bug.
E' possibile generare un modulo di politica locale per consentire questo accesso.
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                          <Sconosciuto>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-259.fc26.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 4.11.7-300.fc26.x86_64 #1 SMP Mon
                              Jun 26 14:54:05 UTC 2017 x86_64 x86_64
Alert Count                   1
First Seen                    2017-07-03 15:01:15 CEST
Last Seen                     2017-07-03 15:01:15 CEST
Local ID                      65dc3522-9269-42a4-86f8-87e6cac8db76

Raw Audit Messages
type=AVC msg=audit(1499086875.458:237): avc:  denied  { read } for  pid=2084 comm="cat" name="last_pwr" dev="tmpfs" ino=27427 scontext=system_u:system_r:tlp_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1


Hash: cat,tlp_t,var_run_t,file,read

Version-Release number of selected component:
selinux-policy-3.13.1-259.fc26.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.1
hashmarkername: setroubleshoot
kernel:         4.11.11-300.fc26.x86_64
type:           libreport

Potential duplicate: bug 1405768