[asterisk-bugs] [Asterisk 0019078]: pri lockup. no futher calls able to be taken

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=19078 
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Reported By:                alecdavis
Assigned To:                
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Project:                    Asterisk
Issue ID:                   19078
Category:                   Channels/chan_dahdi
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.8.2.3 
JIRA:                        
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:             2011-04-06 22:00 CDT
Last Modified:              2011-04-07 23:00 CDT
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Summary:                    pri lockup. no futher calls able to be taken
Description: 
attached backtrace and core show locks
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 (0133523) alecdavis (manager) - 2011-04-07 23:00
 https://issues.asterisk.org/view.php?id=19078#c133523 
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there seems to be a race between hangup and request.

this can be seen in the backtrace-apr7-2 between threads 15 and 18 both
trying to lock 0xb637bb40

rmudgett: looking at your chan_dahdi commits, I noticed this <pre>        
                       /*
                                 * We already have the B channel reserved
for this call.  We
                                 * just need to make sure that
dahdi_hangup() has completed
                                 * cleaning up before continuing.
                                 */
                                ast_mutex_lock(&p->lock);
                                ast_mutex_unlock(&p->lock);</pre>

seems relevant? 

Issue History 
Date Modified    Username       Field                    Change               
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2011-04-07 23:00 alecdavis      Note Added: 0133523                          
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