Bug 1382490

Summary: semodule_unpackage segfaults on certain inputs
Product: Red Hat Enterprise Linux 7 Reporter: Milos Malik <mmalik>
Component: policycoreutilsAssignee: Petr Lautrbach <plautrba>
Status: CLOSED WONTFIX QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: low    
Version: 7.3CC: dwalsh, lvrabec, mgrepl, mmalik, plautrba, ssekidde
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1382472
: 1382760 (view as bug list) Environment:
Last Closed: 2017-06-29 13:41:58 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
first input file found by AFL that crashed semodule_unpackage none

Description Milos Malik 2016-10-06 19:37:32 UTC 
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
Comment 1 Milos Malik 2016-10-06 19:38:14 UTC 
Created attachment 1208028 [details]
first input file found by AFL that crashed semodule_unpackage