Bug 1119559

Summary:	gdb demangler segfaults on certain symbols
Product:	[Fedora] Fedora	Reporter:	John McIver <john.mciver.iii>
Component:	gdb	Assignee:	Jan Kratochvil <jan.kratochvil>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	20	CC:	gbenson, jan.kratochvil, palves, patrickm, pmuldoon, sergiodj
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Unspecified
Whiteboard:
Fixed In Version:	gdb-7.7.1-18.fc20	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-08-21 09:47:20 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:

Description John McIver 2014-07-15 04:16:28 UTC

Description of problem:
The GDB demangler segfaults on certain symbols.

Version-Release number of selected component (if applicable):
Fedora release: 20
GDB package version: 7.7.1-15.fc20.x86_64

How reproducible:
GDB will segfault consistently if a library contains symbols that cause the demangler to enter into an infinite loop.

Steps to Reproduce:
I am working on a simple test case that can be used to reproduce this. In the meantime please see the "Additional info" section.

Actual results:
Segmentation fault (core dumped)

Expected results:
GDB completes symbol elaboration and enters into interactive mode. 

Additional info:
This issue appears to have been fix by one of Redhat's own (Gary Benson). However the patch has not made its way into 7.7.1 or the Fedora RPM package (it does however appear to be part of the newly created 7.8 branch):

https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00404.html
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=210205

Comment 1 Fedora Update System 2014-08-14 20:03:44 UTC

gdb-7.7.1-18.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/gdb-7.7.1-18.fc20

Comment 2 Jan Kratochvil 2014-08-14 20:04:08 UTC

./test-demangle: 888 tests, 0 failures
->
./test-demangle: 895 tests, 0 failures

Comment 3 Fedora Update System 2014-08-16 00:27:30 UTC

Package gdb-7.7.1-18.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing gdb-7.7.1-18.fc20'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2014-9437/gdb-7.7.1-18.fc20
then log in and leave karma (feedback).

Comment 4 John McIver 2014-08-19 22:07:12 UTC

Provided positive karma feedback.

Comment 5 Fedora Update System 2014-08-21 09:47:20 UTC

gdb-7.7.1-18.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.