Description of problem:
SELinux is preventing qemu-system-x86 from 'read' accesses on the file cmdline.

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

If you believe that qemu-system-x86 should be allowed read access on the cmdline 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 'qemu-system-x86' --raw | audit2allow -M my-qemusystemx86
# semodule -X 300 -i my-qemusystemx86.pp

Additional Information:
Source Context                system_u:system_r:svirt_t:s0:c267,c505
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                cmdline [ file ]
Source                        qemu-system-x86
Source Path                   qemu-system-x86
Port                          <Unknown>
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) 4.11.9-300.fc26.x86_64 #1 SMP Wed
                              Jul 5 16:21:56 UTC 2017 x86_64 x86_64
Alert Count                   1
First Seen                    2017-07-13 06:37:38 EDT
Last Seen                     2017-07-13 06:37:38 EDT
Local ID                      cd4a4bce-9886-4b3c-a622-3671d9dfe664

Raw Audit Messages
type=AVC msg=audit(1499942258.349:695): avc:  denied  { read } for  pid=12081 comm="qemu-system-x86" name="cmdline" dev="proc" ino=340259 scontext=system_u:system_r:svirt_t:s0:c267,c505 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=file permissive=1


Hash: qemu-system-x86,svirt_t,unconfined_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:         4.11.9-300.fc26.x86_64
type:           libreport