Description of problem:
It happened after updating selinux-policy-targeted to selinux-policy-targeted-3.12.1-117.fc20.noarch.
SELinux is preventing qemu:CentOS from 'write' accesses on the blk_file /dev/dm-10.

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

If aby qemu:CentOS powinno mieć domyślnie write dostęp do dm-10 blk_file.
Then proszę to zgłosić jako błąd.
Można utworzyć lokalny moduł polityki, aby umożliwić ten dostęp.
Do
można tymczasowo zezwolić na ten dostęp wykonując polecenia:
# grep qemu:CentOS /var/log/audit/audit.log | audit2allow -M mojapolityka
# semodule -i mojapolityka.pp

Additional Information:
Source Context                system_u:system_r:svirt_t:s0:c357,c850
Target Context                system_u:object_r:fixed_disk_device_t:s0
Target Objects                /dev/dm-10 [ blk_file ]
Source                        qemu:CentOS
Source Path                   qemu:CentOS
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           qemu-system-x86-1.6.1-3.fc20.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-117.fc20.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.12.7-300.fc20.x86_64 #1 SMP Fri
                              Jan 10 15:35:31 UTC 2014 x86_64 x86_64
Alert Count                   4
First Seen                    2014-01-19 12:36:49 CET
Last Seen                     2014-01-19 12:37:14 CET
Local ID                      2718f684-5203-491e-8c02-b286cb010bed

Raw Audit Messages
type=AVC msg=audit(1390131434.659:2406): avc:  denied  { write } for  pid=4489 comm="qemu:CentOS" path="/dev/dm-10" dev="devtmpfs" ino=16270 scontext=system_u:system_r:svirt_t:s0:c357,c850 tcontext=system_u:object_r:fixed_disk_device_t:s0 tclass=blk_file


type=SYSCALL msg=audit(1390131434.659:2406): arch=x86_64 syscall=io_submit success=yes exit=EPERM a0=7fe1cadf2000 a1=1 a2=7fe1cede34d0 a3=8 items=0 ppid=1 pid=4489 auid=4294967295 uid=107 gid=107 euid=107 suid=107 fsuid=107 egid=107 sgid=107 fsgid=107 ses=4294967295 tty=(none) comm=qemu:CentOS exe=/usr/bin/qemu-system-x86_64 subj=system_u:system_r:svirt_t:s0:c357,c850 key=(null)

Hash: qemu:CentOS,svirt_t,fixed_disk_device_t,blk_file,write

Additional info:
reporter:       libreport-2.1.11
hashmarkername: setroubleshoot
kernel:         3.12.7-300.fc20.x86_64
type:           libreport