Bug 1211540

Summary: ksh shell segv faults when handling trap
Product: Red Hat Enterprise Linux 7 Reporter: Martin Kyral <mkyral>
Component: kshAssignee: Siteshwar Vashisht <svashisht>
Status: CLOSED ERRATA QA Contact: Martin Kyral <mkyral>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1CC: ccheney, dkutalek, isenfeld, jkejda, kdudka, mhlavink, mkyral, ngalvin, ovasik, pandrade
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: ksh-20120801-26.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1117404 Environment:
Last Closed: 2016-11-04 07:45:36 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:
Embargoed:
Bug Depends On: 1117404    
Bug Blocks: 1203710, 1289025, 1295396, 1295829, 1313485    

Description Martin Kyral 2015-04-14 09:29:24 UTC 
+++ This bug was initially created as a clone of Bug #1117404 +++

Description of problem:
ksh shell segv faults when handling trap in function

Version-Release number of selected component (if applicable):
ksh-20120801-22.el7

How reproducible:
Very

Steps to Reproduce:
Example script to generate failure (repMon):
#!/bin/ksh
f()
{(
  trap "" HUP
)}
trap "" HUP
while [ 1 ] ; do
  f
done

./repMon
Segmentation fault (core dumped)

Expected results:
ksh does not crash

Additional info:
Failure does NOT occur on Solaris or RHEL 5.x - only RHEL 6.x.  Bash does not fault.

Tried workaround https://access.redhat.com/site/solutions/142573:
./repMon -c 2 nice -n19
Segmentation fault (core dumped)
Comment 7 errata-xmlrpc 2016-11-04 07:45:36 UTC 
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://rhn.redhat.com/errata/RHBA-2016-2510.html