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Description of problem:
* already fixed in upstream, but it still affects RHEL-7.3

Version-Release number of selected component (if applicable):
policycoreutils-debuginfo-2.5-9.el7.x86_64
policycoreutils-sandbox-2.5-9.el7.x86_64
policycoreutils-python-2.5-9.el7.x86_64
policycoreutils-newrole-2.5-9.el7.x86_64
policycoreutils-devel-2.5-9.el7.x86_64
policycoreutils-gui-2.5-9.el7.x86_64
policycoreutils-2.5-9.el7.x86_64

How reproducible:
* always

Steps to Reproduce:
# checkmodule -M -m -o mypolicy.mod mypolicy.te
checkmodule:  loading policy configuration from mypolicy.te
checkmodule:  policy configuration loaded
checkmodule:  writing binary representation (version 17) to mypolicy.mod
# rm -f mypolicy.fc mypolicy.nc
# touch mypolicy.fc mypolicy.nc
# semodule_package -o mypolicy.pp -m mypolicy.mod --fc mypolicy.fc
semodule_package:  Failed to mmap mypolicy.fc:  Invalid argument
# semodule_package -o mypolicy.pp -m mypolicy.mod --nc mypolicy.nc
semodule_package:  Failed to mmap mypolicy.nc:  Invalid argument
# 

Actual results:
* semodule_package calls mmap() on an empty file

Expected results:
* semodule_package doesn't call mmap() on an empty file

Probably fixed by this patch https://github.com/SELinuxProject/selinux/commit/266c16ff535a0d7fc89add6db3c13a879be6cdd5

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1883