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

Wed Jul 21 11:20:20 CDT 2010

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:                 fixed
Fixed in Version:           
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Date Submitted:             2010-04-15 08:06 CDT
Last Modified:              2010-07-21 11:20 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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---------------------------------------------------------------------- 
 (0124799) svnbot (reporter) - 2010-07-21 11:20
 https://issues.asterisk.org/view.php?id=17187#c124799 
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Repository: asterisk
Revision: 278479

_U  branches/1.6.2/
U   branches/1.6.2/res/res_timing_pthread.c

------------------------------------------------------------------------
r278479 | russell | 2010-07-21 11:20:17 -0500 (Wed, 21 Jul 2010) | 48
lines

Merged revisions 278465 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

........
  r278465 | russell | 2010-07-21 11:15:00 -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=278479 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-07-21 11:20 svnbot         Checkin                                      
2010-07-21 11:20 svnbot         Note Added: 0124799                          
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