Bug 1302229

Summary:	segfault in script after ulimit -v [RHEL-7]
Product:	Red Hat Enterprise Linux 7	Reporter:	Kamil Dudka <kdudka>
Component:	zsh	Assignee:	Kamil Dudka <kdudka>
Status:	CLOSED ERRATA	QA Contact:	Jan Kepler <jkejda>
Severity:	low	Docs Contact:	Maxim Svistunov <msvistun>
Priority:	unspecified
Version:	7.2	CC:	isenfeld, jkejda, mkyral, ovasik
Target Milestone:	rc	Keywords:	Patch
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	zsh-5.0.2-18.el7	Doc Type:	Bug Fix
Doc Text:	zsh handles the "out of memory" scenario gracefully now The zsh shell allocates memory while printing the `out of memory` fatal error message. Previously, if the printing routine failed to allocate memory, it triggered an infinite recursion. Consequently, the zsh process terminated unexpectedly due to a stack overflow. With this update, the infinite recursion no longer appears in this scenario. As a result, after printing the fatal error message, zsh now terminates gracefully in case it runs out of memory.	Story Points:	---
Clone Of:	1300958	Environment:
Last Closed:	2016-11-03 23:03:06 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:	1300958

Description Kamil Dudka 2016-01-27 09:11:48 UTC

+++ This bug was initially created as a clone of Bug #1300958 +++

--- Additional comment from Kamil Dudka on 2016-01-25 14:56 CET ---
Created attachment #1118021 [details]
proof-of-concept reproducer

I have attached a universal reproducer script.  It is not completely reliable because dynamic linker and pthread run-time may run out of memory sooner than zsh itself in some cases.  Nevertheless, I am able to trigger the infinite recursion with upstream git HEAD if I create a statically linked executable.

--- Additional comment from Kamil Dudka on 2016-01-25 16:22:58 CET ---

reported upstream:

http://www.zsh.org/mla/workers/2016/msg00310.html

--- Additional comment from Kamil Dudka on 2016-01-27 09:25:40 CET ---

upstream commits:

https://sourceforge.net/p/zsh/code/ci/be32864e
https://sourceforge.net/p/zsh/code/ci/69c86cd2

--- Additional comment from Kamil Dudka on 2016-01-27 10:08:07 CET ---

fixed in zsh-5.2-4.fc24

Comment 8 errata-xmlrpc 2016-11-03 23:03:06 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