Bug 742244

Summary: ksh script never comes back
Product: Red Hat Enterprise Linux 6 Reporter: Marko Karg <mkarg>
Component: kshAssignee: Michal Hlavinka <mhlavink>
Status: CLOSED ERRATA QA Contact: qe-baseos-tools-bugs
Severity: unspecified Docs Contact:
Priority: medium    
Version: 6.1CC: ddumas, mfranc, ovasik, prc
Target Milestone: rc   
Target Release: 6.2   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: ksh-20100621-10.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-12-06 16:25:10 UTC Type: ---
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:    
Bug Blocks: 743302    
Attachments:
Description Flags
strace of the script on 64bit none

Description Marko Karg 2011-09-29 13:46:22 UTC 
Created attachment 525570 [details]
strace of the script on 64bit

Description of problem:

On RHEL 6.1 64bit the following ksh never comes back:

#!/bin/ksh
f_cmd () {
	CMD="$1"
	OUT="$(eval "$CMD" 2>&1)"
	echo "$OUT"
}
f_cmd "dd if=/dev/zero bs=128001 count=1 | cat | cat >/dev/null"

Version-Release number of selected component (if applicable):

ksh-20100621-6.el6.x86_64

How reproducible:

always

Steps to Reproduce:
1. run the script from above on a 64bit RHEL 6.1 machine
  
Actual results:

The script never exits

Expected results:

Script should exit after executing the commands

Additional info:

The problem only occurs on 64bit architecture, not on 32bit. Also, current fedora 64bit does not show the problem.
Comment 10 errata-xmlrpc 2011-12-06 16:25:10 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.

http://rhn.redhat.com/errata/RHBA-2011-1647.html