Description of problem:
SELinux is preventing abrt-action-sav from 'write' accesses on the directory /var/lib/rpm.

*****  Plugin restorecon (94.8 confidence) suggests   ************************

If you want to fix the label. 
/var/lib/rpm default label should be rpm_var_lib_t.
Then you can run restorecon. The access attempt may have been stopped due to insufficient permissions to access a parent directory in which case try to change the following command accordingly.
Do
# /sbin/restorecon -v /var/lib/rpm

*****  Plugin catchall_labels (5.21 confidence) suggests   *******************

If you want to allow abrt-action-sav to have write access on the rpm directory
Then you need to change the label on /var/lib/rpm
Do
# semanage fcontext -a -t FILE_TYPE '/var/lib/rpm'
where FILE_TYPE is one of the following: abrt_tmp_t, abrt_upload_watch_tmp_t, abrt_var_cache_t, abrt_var_log_t, abrt_var_run_t, admin_home_t, mail_home_rw_t, mock_var_lib_t, rpm_var_cache_t, rpm_var_run_t, sosreport_tmp_t, tmp_t, user_home_dir_t, var_log_t, var_run_t, var_spool_t, var_t.
Then execute:
restorecon -v '/var/lib/rpm'


*****  Plugin catchall (1.44 confidence) suggests   **************************

If you believe that abrt-action-sav should be allowed write access on the rpm directory 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 'abrt-action-sav' --raw | audit2allow -M my-abrtactionsav
# semodule -X 300 -i my-abrtactionsav.pp

Additional Information:
Source Context                system_u:system_r:abrt_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:var_lib_t:s0
Target Objects                /var/lib/rpm [ dir ]
Source                        abrt-action-sav
Source Path                   abrt-action-sav
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    <Unknown>
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.16.2-300.fc28.x86_64 #1 SMP Thu
                              Apr 12 14:58:07 UTC 2018 x86_64 x86_64
Alert Count                   1
First Seen                    2018-04-22 21:07:31 CEST
Last Seen                     2018-04-22 21:07:31 CEST
Local ID                      45c040ad-7295-4a8d-b6aa-21ab9f36a331

Raw Audit Messages
type=AVC msg=audit(1524424051.29:237): avc:  denied  { write } for  pid=2903 comm="abrt-action-sav" name="rpm" dev="dm-0" ino=918868 scontext=system_u:system_r:abrt_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:var_lib_t:s0 tclass=dir permissive=0


Hash: abrt-action-sav,abrt_t,var_lib_t,dir,write


Additional info:
component:      selinux-policy
reporter:       libreport-2.9.4
hashmarkername: setroubleshoot
kernel:         4.16.2-300.fc28.x86_64
type:           libreport

Potential duplicate: bug 1500177