Description of problem:
SELinux is preventing udevadm from 'map' accesses on the arquivo /etc/selinux/targeted/contexts/files/file_contexts.bin.

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

If you believe that udevadm should be allowed map access on the file_contexts.bin file by default.
Then você deve informar que este é um erro.
Você pode gerar um módulo de política local para permitir este acesso.
Do
allow this access for now by executing:
# ausearch -c 'udevadm' --raw | audit2allow -M my-udevadm
# semodule -X 300 -i my-udevadm.pp

Additional Information:
Source Context                system_u:system_r:snappy_t:s0
Target Context                unconfined_u:object_r:file_context_t:s0
Target Objects                /etc/selinux/targeted/contexts/files/file_contexts
                              .bin [ file ]
Source                        udevadm
Source Path                   udevadm
Port                          <Desconhecido>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           selinux-policy-targeted-3.13.1-283.26.fc27.noarch
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                   2
First Seen                    2018-03-03 16:19:48 -03
Last Seen                     2018-03-14 09:15:40 -03
Local ID                      3856df41-f190-4105-af19-dc8b1037ffd7

Raw Audit Messages
type=AVC msg=audit(1521029740.566:335): avc:  denied  { map } for  pid=20707 comm="udevadm" path="/etc/selinux/targeted/contexts/files/file_contexts.bin" dev="sda7" ino=2492831 scontext=system_u:system_r:snappy_t:s0 tcontext=unconfined_u:object_r:file_context_t:s0 tclass=file permissive=1


Hash: udevadm,snappy_t,file_context_t,file,map

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:         4.15.8-300.fc27.x86_64
type:           libreport