0001377: freeradius segfaults - PacketFence

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Date Submitted

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0001377

PacketFence

upstream

public

2012-02-07 11:03

2012-02-28 14:31

Reporter

obilodeau

Assigned To

obilodeau

Priority

normal

Severity

minor

Reproducibility

random

Status

closed

Resolution

fixed

Platform

OS Version

Product Version

Target Version

3.2.0

Fixed in Version

3.2.0

Summary

0001377: freeradius segfaults

Description

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb54f4b90 (LWP 27887)]
0x00bc5726 in Perl_sv_setsv_flags () from /usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE/libperl.so

We're seeing this since a little while, so far we haven't got too deep into identifying root cause as we were thinking it was a freeradius problem... Now, I am getting tired of it...

Affects large environments

- Unable to reliably reproduce
- Tried freeradius 2.1.10-12 packaged and from source

Candidate solutions to move things forward:
- http://wiki.freeradius.org/Rlm_perl#Debug [^]
- recompile freeradius and perl together with a stable perl release (> 5.10)
- try to make the stacktrace better by compiling freeradius AND perl with debug/symbols enabled
- try other rlm_perl debug options as outlined on the freeradius-users list (http://www.mail-archive.com/search?q=debug+rlm_perl&l=freeradius-users%40lists.freeradius.org [^])

WORKAROUND:

Use watchdog script in addons/.

Steps To Reproduce

1. Have a large wireless deployment
2. See radiusd segfault at least once a week

Tags

No tags attached.

fixed in git revision

fixed in mtn revision

8219835d3324599dc23038758d2ef3324c25ae5b

Attached Files

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Notes
(0002574) obilodeau (reporter) 2012-02-21 14:09	We were able to reliably reproduce in a specific environment with a lot of load. With gdb we still tracked down the issue to rlm_perl / libperl.so. Discussing the problem to people outside of it, we got suggestions to track all native modules used by our perl module. We found out about Sys::Syslog which uses the native syslog library by default. We decided to port our logging to the native facilities offered by radius' rlm_perl and configure radius to log to the syslog by default.

(0002575) obilodeau (reporter) 2012-02-21 20:54	This is tentatively marked as fixed. We think we nailed it in at least one obvious crashing case but we won't know for sure until we've deployed the fix more widely. If you still get radiusd segfaults please let us know and re-open.

(0002583) obilodeau (reporter) 2012-02-28 14:31	Fixed in recently released 3.2.0.

Issue History
Date Modified	Username	Field	Change
2012-02-07 11:03	obilodeau	New Issue
2012-02-07 11:09	obilodeau	Description Updated
2012-02-21 14:05	obilodeau	Status	new => assigned
2012-02-21 14:05	obilodeau	Assigned To	=> obilodeau
2012-02-21 14:09	obilodeau	Note Added: 0002574
2012-02-21 14:10	obilodeau	Description Updated
2012-02-21 20:54	obilodeau	mtn revision	=> 8219835d3324599dc23038758d2ef3324c25ae5b
2012-02-21 20:54	obilodeau	Note Added: 0002575
2012-02-21 20:54	obilodeau	Status	assigned => resolved
2012-02-21 20:54	obilodeau	Fixed in Version	=> trunk
2012-02-21 20:54	obilodeau	Resolution	open => fixed
2012-02-28 14:22	obilodeau	Target Version	=> 3.2.0
2012-02-28 14:22	obilodeau	Fixed in Version	trunk => 3.2.0
2012-02-28 14:31	obilodeau	Note Added: 0002583
2012-02-28 14:31	obilodeau	Status	resolved => closed