Bug 1302229 – segfault in script after ulimit -v [RHEL-7]

Bug 1302229 - segfault in script after ulimit -v [RHEL-7]

Summary:	segfault in script after ulimit -v [RHEL-7]

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	zsh (Show other bugs)
Sub Component:
Version:	7.2
Hardware:	Unspecified Unspecified

Priority	unspecified Severity low
Target Milestone:	rc
Target Release:	---
Assigned To:	Kamil Dudka
QA Contact:	Jan Kepler
Docs Contact:	Maxim Svistunov

URL:
Whiteboard:
Keywords:	Patch

Depends On:
Blocks:	1300958
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Reported:	2016-01-27 04:11 EST by Kamil Dudka
Modified:	2016-11-03 19:03 EDT (History)
CC List:	4 users (show)

See Also:
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 19:03:06 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Kamil Dudka 2016-01-27 04:11:48 EST

+++ 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 19:03:06 EDT

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

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