[asterisk-bugs] [Asterisk 0017187]: crash when calling ao2_unlock inside pthread_timer_disable_continuous - NOT FIXED PLEASE RE-OPEN

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17187 
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Reported By:                Eddie Edwards
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17187
Category:                   Resources/res_timing_pthread
Reproducibility:            random
Severity:                   crash
Priority:                   normal
Status:                     closed
Asterisk Version:           1.6.1.18 
JIRA:                       SWP-1297 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 suspended
Fixed in Version:           
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Date Submitted:             2010-04-15 08:06 CDT
Last Modified:              2010-07-21 11:15 CDT
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Summary:                    crash when calling ao2_unlock inside
pthread_timer_disable_continuous - NOT FIXED PLEASE RE-OPEN
Description: 
See https://issues.asterisk.org/view.php?id=15915.  We are also experiencing
this issue.  Asterisk 1.6.1.6.

Bug has been closed because Digium thinks it is a compiler bug.  Quote
tilghman:

"As it turns out, the "@plt" is a dead giveaway as to the source of this
problem. This is a problem in the compiler/linker tools for your platform.
Please report this issue upstream to the package maintainers of your
distribution environment. This is NOT a bug in Asterisk, but a compiler (or
linker) bug."

This is clearly not the case.  By the time the bug is hit (at load of
around 200 calls) ao2_unlock has already been called thousands if not
millions of times.  The dynamic linker is not entered subsequently.  There
is no evidence of a linker problem.

In all likelihood, Asterisk is trashing the PLT itself via a bad pointer.

Please re-open https://issues.asterisk.org/view.php?id=15915 and fix.
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Relationships       ID      Summary
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has duplicate       0015915 crash when calling ao2_unlock inside pt...
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 (0124788) svnbot (reporter) - 2010-07-21 11:15
 https://issues.asterisk.org/view.php?id=17187#c124788 
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Repository: asterisk
Revision: 278465

U   trunk/res/res_timing_pthread.c

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r278465 | russell | 2010-07-21 11:14:59 -0500 (Wed, 21 Jul 2010) | 41
lines

Use poll() instead of select() in res_timing_pthread to avoid stack
corruption.

This code did not properly check FD_SETSIZE to ensure that it did not try
to
select() on fds that were too large.  Switching to poll() removes the
limitation
on the maximum fd value.

(closes issue https://issues.asterisk.org/view.php?id=15915)
Reported by: keiron

(closes issue https://issues.asterisk.org/view.php?id=17187)
Reported by: Eddie Edwards

(closes issue https://issues.asterisk.org/view.php?id=16494)
Reported by: Hubguru

(closes issue https://issues.asterisk.org/view.php?id=15731)
Reported by: flop

(closes issue https://issues.asterisk.org/view.php?id=12917)
Reported by: falves11

(closes issue https://issues.asterisk.org/view.php?id=14920)
Reported by: vrban

(closes issue https://issues.asterisk.org/view.php?id=17199)
Reported by: aleksey2000

(closes issue https://issues.asterisk.org/view.php?id=15406)
Reported by: kowalma

(closes issue https://issues.asterisk.org/view.php?id=17438)
Reported by: dcabot

(closes issue https://issues.asterisk.org/view.php?id=17325)
Reported by: glwgoes

(closes issue https://issues.asterisk.org/view.php?id=17118)
Reported by: erikje

possibly other issues, too ...

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http://svn.digium.com/view/asterisk?view=rev&revision=278465 

Issue History 
Date Modified    Username       Field                    Change               
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2010-07-21 11:15 svnbot         Checkin                                      
2010-07-21 11:15 svnbot         Note Added: 0124788                          
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