Description of problem:
* found by American Fuzzy Lop

Version-Release number of selected component (if applicable):
libselinux-2.5-6.el7.x86_64
libselinux-devel-2.5-6.el7.x86_64
libselinux-python-2.5-6.el7.x86_64
libselinux-utils-2.5-6.el7.x86_64
libsemanage-2.5-4.el7.x86_64
libsemanage-devel-2.5-4.el7.x86_64
libsemanage-python-2.5-4.el7.x86_64
libsemanage-static-2.5-4.el7.x86_64
libsepol-2.5-6.el7.x86_64
libsepol-devel-2.5-6.el7.x86_64
libsepol-static-2.5-6.el7.x86_64
policycoreutils-2.5-9.el7.x86_64
policycoreutils-devel-2.5-9.el7.x86_64
policycoreutils-python-2.5-9.el7.x86_64

How reproducible:
* always

Steps to Reproduce:
# semodule_unpackage crash3 mypolicy.mod
security: ebitmap: high bit (1) is not a multiple of the map size (64)
security: ebitmap: map size 1 does not match my size 64 (high bit was 64)
security: ebitmap: map size 1 does not match my size 64 (high bit was 0)
Segmentation fault
# echo $?
139
# dmesg | tail -n 1
[ 2949.753911] semodule_unpack[10082]: segfault at 7f18626abfc8 ip 00007f10613f6dd4 sp 00007fff7b7c5200 error 6 in libsepol.so.1[7f10613c8000+95000]
# 

Actual results:
* segfault

Expected results:
* some error message but no segfault