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Bug 1198671

Summary: zsh hangs in rt_sig state in getoutput()
Product: Red Hat Enterprise Linux 7 Reporter: Filip Krska <fkrska>
Component: zshAssignee: Kamil Dudka <kdudka>
Status: CLOSED ERRATA QA Contact: Jan Kepler <jkejda>
Severity: medium Docs Contact:
Priority: urgent    
Version: 7.2CC: fkrska, jkejda, kdudka, mkolaja, ovasik
Target Milestone: betaKeywords: ZStream
Target Release: 7.3   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: zsh-5.0.2-19.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1338663 (view as bug list) Environment:
Last Closed: 2016-11-03 23:01:51 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: 1311166, 1338663, 1622892    

Comment 5 Kamil Dudka 2015-08-10 10:58:08 UTC 
A similar issues is now discussed in the following thread on upstream ML:

http://www.zsh.org/mla/workers/2015/msg01897.html

Two patches were applied to address it recently:

http://sourceforge.net/p/zsh/code/ci/99586845
http://sourceforge.net/p/zsh/code/ci/df5f8255

The solution does not seem to be ready for RHEL yet.  One of the patches currently breaks the upstream test-suite on Intel x86_64:

http://www.zsh.org/mla/workers/2015/msg01961.html
Comment 6 Kamil Dudka 2015-08-10 16:15:54 UTC 
The following upstream commit makes the test-suite work again:

http://sourceforge.net/p/zsh/code/ci/a07f74fa
Comment 7 Kamil Dudka 2015-08-11 14:55:36 UTC 
Yet another follow-up commit upstream:

http://sourceforge.net/p/zsh/code/ci/93ca77f8
Comment 8 Kamil Dudka 2015-08-11 17:24:42 UTC 
Two more upstream commits on this topic:

http://sourceforge.net/p/zsh/code/ci/1af2e6e0
http://sourceforge.net/p/zsh/code/ci/128bf385
Comment 9 Kamil Dudka 2015-08-17 08:26:04 UTC 
One more commit upstream:

http://sourceforge.net/p/zsh/code/ci/5d019f42
Comment 10 Kamil Dudka 2015-09-10 14:38:11 UTC 
One more commit upstream:

http://sourceforge.net/p/zsh/code/ci/9f5dffa1
Comment 11 Kamil Dudka 2016-03-01 12:31:04 UTC 
The above patches may change the order of execution under some circumstances, which can be observed as a change in behavior inappropriate for RHEL-6 in its current phase of life.

I am moving this bug to RHEL-7 but for RHEL-6 I will pick the fixes that look safe enough to be applied on RHEL-6 (the signal queuing guards around code using heap memory allocation).  I will use bug #1311166 for the RHEL-6 fixes.
Comment 12 Kamil Dudka 2016-03-01 12:40:07 UTC 
*** Bug 1311172 has been marked as a duplicate of this bug. ***
Comment 14 Kamil Dudka 2016-03-01 15:31:26 UTC 
I have picked one more upstream commit to make sure that pattern matching will not become less interruptible because of the other upstream patches that were backported:

http://sourceforge.net/p/zsh/code/ci/8672d19f
Comment 19 Kamil Dudka 2016-03-09 16:08:42 UTC 
This seems to be also related (although more about interactive use of zsh):

https://sourceforge.net/p/zsh/code/ci/f4dfca49
Comment 29 errata-xmlrpc 2016-11-03 23:01:51 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-2016-2152.html