Description of problem:
I am trying to install snap hello-world, but when I try, I get this error and the installation freezes.
SELinux is preventing snapd from 'getattr' accesses on the file /proc/<pid>/stat.

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

If you believe that snapd should be allowed getattr access on the stat 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 'snapd' --raw | audit2allow -M my-snapd
# semodule -X 300 -i my-snapd.pp

Additional Information:
Source Context                system_u:system_r:snappy_t:s0
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                /proc/<pid>/stat [ file ]
Source                        snapd
Source Path                   snapd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-283.16.fc27.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.13.13-300.fc27.x86_64 #1 SMP Wed
                              Nov 15 15:47:50 UTC 2017 x86_64 x86_64
Alert Count                   1
First Seen                    2017-12-02 16:48:49 PST
Last Seen                     2017-12-02 16:48:49 PST
Local ID                      31e7b6b8-9755-41c6-af9e-aaf3e317a720

Raw Audit Messages
type=AVC msg=audit(1512262129.547:2888): avc:  denied  { getattr } for  pid=1483 comm="snapd" path="/proc/1852/stat" dev="proc" ino=9668616 scontext=system_u:system_r:snappy_t:s0 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=file permissive=1


Hash: snapd,snappy_t,unconfined_t,file,getattr

Version-Release number of selected component:
selinux-policy-3.13.1-283.16.fc27.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.3
hashmarkername: setroubleshoot
kernel:         4.13.13-300.fc27.x86_64
type:           libreport