Bug 684829 - ksh crashes when IFS is unset inside a function
Summary: ksh crashes when IFS is unset inside a function
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: ksh
Version: 5.5
Hardware: Unspecified
OS: Unspecified
urgent
high
Target Milestone: rc
: ---
Assignee: Michal Hlavinka
QA Contact: BaseOS QE - Apps
URL:
Whiteboard:
Depends On: 683722
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-14 15:42 UTC by RHEL Program Management
Modified: 2011-03-28 07:46 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The KornShell's "IFS" variable contains a list of field separators and is used to separate the results of command substitution, parameter expansion, or separate fields with the "read" built-in command. Previously, ksh did not protect this variable from being freed. Consequent to this, when a user attempted to unset the "IFS" variable from within a function, ksh terminated unexpectedly with a segmentation fault. With this update, an upstream patch has been applied to address this issue, and using the "unset IFS" command inside a function body no longer causes ksh to crash.
Clone Of:
Environment:
Last Closed: 2011-03-28 07:46:01 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0385 0 normal SHIPPED_LIVE ksh bug fix update 2011-03-28 07:45:56 UTC

Description RHEL Program Management 2011-03-14 15:42:15 UTC 
This bug has been copied from bug #683722 and has been proposed
to be backported to 5.6 z-stream (EUS).
Comment 6 Jaromir Hradilek 2011-03-25 14:42:02 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
The KornShell's "IFS" variable contains a list of field separators and is used to separate the results of command substitution, parameter expansion, or separate fields with the "read" built-in command. Previously, ksh did not protect this variable from being freed. Consequent to this, when a user attempted to unset the "IFS" variable from within a function, ksh terminated unexpectedly with a segmentation fault. With this update, an upstream patch has been applied to address this issue, and using the "unset IFS" command inside a function body no longer causes ksh to crash.
Comment 7 errata-xmlrpc 2011-03-28 07:46:01 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0385.html
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