[asterisk-bugs] [Asterisk 0018310]: [patch] hint state changes deadlock/race

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18310 
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Reported By:                one47
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18310
Category:                   Core/PBX
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           1.6.2.14 
JIRA:                       SWP-2541 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-11-15 12:19 CST
Last Modified:              2011-01-06 07:06 CST
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Summary:                    [patch] hint state changes deadlock/race
Description: 
VERY similar to https://issues.asterisk.org/view.php?id=18165, but this is a
different deadlock path, so I have
raised a separate report.

Thread 1: taskprocessor  -> handle_statechange
    Lock order = conlock, hints, hint, pvt
Thread 2: chan_sip.c:  handle_request_do -> handle_response_notify
    Lock order = pvt, conlock

Thread2 only gets into the conlock if STATECHANGEQUEUE is true, ie. there
are rapid state changes happening on a subscribed hint.
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Relationships       ID      Summary
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related to          0018165 [patch] hint state changes deadlock pro...
has duplicate       0018535 app_queue deadlocks if weight is set
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 (0130252) one47 (reporter) - 2011-01-06 07:06
 https://issues.asterisk.org/view.php?id=18310#c130252 
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I am seeing some kind of corruption with the newer patch - I have not yet
identified the source, but it seems that the CallBack data that is passed
into chan_sip.c:cb_extensionstate() is not a sip_pvt*

The result is:

[Jan  6 12:41:37] ERROR[11547]:
/usr/src/asterisk-1.6.2.15/include/asterisk/lock.h:619
__ast_pthread_mutex_lock: chan_sip.c line 13045 (cb_extensionstate): Error
obtaining mutex: Invalid argument
Program received signal SIGSEGV, Segmentation fault.

I am still looking for any obvious reason for this. Not found it yet. 

Issue History 
Date Modified    Username       Field                    Change               
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2011-01-06 07:06 one47          Note Added: 0130252                          
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