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Bug 1138751

Summary: shell hangs if setting variable from command that produces more than 120k and is piped
Product: Red Hat Enterprise Linux 6 Reporter: Filip Krska <fkrska>
Component: kshAssignee: Michal Hlavinka <mhlavink>
Status: CLOSED ERRATA QA Contact: Martin Kyral <mkyral>
Severity: urgent Docs Contact:
Priority: urgent    
Version: 6.5CC: akarlsso, bnater, jkejda, jsvarova, kdudka, mkyral, ovasik, tlavigne
Target Milestone: rcKeywords: Regression, Reproducer, ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: ksh-20120801-22.el6 Doc Type: Bug Fix
Doc Text:
Previously, the KornShell became unresponsive when setting a variable from a command that produced more than 120 k and was then piped. A patch has been applied to fix this bug, and KornShell now executes commands correctly.
 Story Points: ---
Clone Of:
: 1141243 1148830 1148831 (view as bug list) Environment:
Last Closed: 2015-07-22 06:55:57 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:    
Bug Blocks: 1148830, 1148831, 1159926    
Attachments:
Description Flags
patch to fix this
none
patch to fix this v2
none
patch to fix this v3 none

Description Filip Krska 2014-09-05 14:41:25 UTC 
Description of problem:

release fixing Bug 1062296 hangs on reproducer with added pipe

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

ksh-20120801-10.el6_5.9

How reproducible:

Always

Steps to Reproduce:
1. HANG=`dd if=/dev/zero bs=1k count=117 2>/dev/null|cat`
2.
3.

Actual results:

Command hangs

Expected results:

Command executes correctly

Additional info:

ksh-20120801-10.el6 doesn't reproduce => regression
Comment 4 Michal Hlavinka 2014-09-12 13:51:54 UTC 
reproducible, around one of eight times it hangs
Comment 5 Michal Hlavinka 2014-09-16 08:05:38 UTC 
Created attachment 937901 [details]
patch to fix this
Comment 9 Michal Hlavinka 2014-09-16 14:38:11 UTC 
Created attachment 938046 [details]
patch to fix this v2
Comment 10 Michal Hlavinka 2014-09-16 16:52:38 UTC 
*** Bug 1138590 has been marked as a duplicate of this bug. ***
Comment 15 Michal Hlavinka 2014-09-18 13:47:20 UTC 
Created attachment 938914 [details]
patch to fix this v3
Comment 22 Branislav Náter 2014-10-02 11:43:54 UTC 
Reproducer available qa_ack+
Comment 28 errata-xmlrpc 2015-07-22 06:55:57 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-2015-1450.html