Bug 1722216

Summary:	glibc: During exit, skip wide buffer handling for legacy stdio handles
Product:	[Fedora] Fedora	Reporter:	Florian Weimer <fweimer>
Component:	glibc	Assignee:	Florian Weimer <fweimer>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	29	CC:	aoliva, arjun.is, codonell, dj, fweimer, law, mfabian, pfrankli, rth, siddhesh
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Unspecified
Whiteboard:
Fixed In Version:	glibc-2.29.9000-29.fc31 glibc-2.29-17.fc30 glibc-2.28-35.fc29	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1722215	Environment:
Last Closed:	2019-09-21 05:46:56 UTC	Type:	---
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:	1722215

Description Florian Weimer 2019-06-19 17:31:20 UTC

+++ This bug was initially created as a clone of Bug #1722215 +++

This commit, which went into glibc 2.23, introduces wide stream buffer deallocation during the exit produces:

commit a601b74d31ca086de38441d316a3dee24c866305
Author: Paul Pluzhnikov <ppluzhnikov>
Date:   Sat Aug 8 16:27:58 2015 -0700

    In preparation for fixing BZ#16734, fix failure in misc/tst-error1-mem
    when _G_HAVE_MMAP is turned off.

This results in an out-of-bounds access with unpredictable consequences during process shutdown for i386 binaries which enable the legacy stdio handles.

Usually, this is supposed to happen only for very old binaries, but it turns out that the launchers in OpenJDK 8 are linked in such a way that this happens for them as well.  See bug 1688841 for details.

To maximize compatibility, we should backport the eventual upstream fix to glibc.

Comment 1 Fedora Update System 2019-09-05 09:20:16 UTC

FEDORA-2019-2e9a65b50a has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-2e9a65b50a

Comment 2 Fedora Update System 2019-09-05 12:53:25 UTC

glibc-2.29-22.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-2e9a65b50a

Comment 3 Fedora Update System 2019-09-06 09:44:23 UTC

FEDORA-2019-8532718f88 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2019-8532718f88

Comment 4 Fedora Update System 2019-09-06 12:33:58 UTC

glibc-2.29-22.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2019-09-06 13:21:50 UTC

glibc-2.28-39.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-8532718f88

Comment 6 Fedora Update System 2019-09-21 01:42:21 UTC

glibc-2.28-39.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.