Description of problem:
SELinux is preventing sh from 'write' accesses on the directory /tmp.

*****  Plugin restorecon (99.5 confidence) suggests   ************************

If you want to fix the label. 
/tmp default label should be tmp_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 /tmp

*****  Plugin catchall (1.49 confidence) suggests   **************************

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

Additional Information:
Source Context                system_u:system_r:abrt_t:s0-s0:c0.c1023
Target Context                system_u:object_r:tmpfs_t:s0
Target Objects                /tmp [ dir ]
Source                        sh
Source Path                   sh
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           filesystem-3.8-3.fc28.x86_64
Policy RPM                    selinux-policy-3.14.2-16.fc29.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.17.0-0.rc3.git3.1.fc29.x86_64 #1
                              SMP Thu May 3 20:42:06 UTC 2018 x86_64 x86_64
Alert Count                   2
First Seen                    2018-05-06 02:19:49 +05
Last Seen                     2018-05-06 02:19:49 +05
Local ID                      e855406c-608a-4fa6-beeb-11c968f352e6

Raw Audit Messages
type=AVC msg=audit(1525555189.593:320): avc:  denied  { write } for  pid=30402 comm="sh" name="/" dev="tmpfs" ino=21712 scontext=system_u:system_r:abrt_t:s0-s0:c0.c1023 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=0


Hash: sh,abrt_t,tmpfs_t,dir,write

Version-Release number of selected component:
selinux-policy-3.14.2-16.fc29.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.17.0-0.rc3.git4.1.fc29.x86_64
type:           libreport

Potential duplicate: bug 1555187