[asterisk-bugs] [Asterisk 0018654]: [patch] [regression] Call Pickup Hangs Asterisk (deadlock?)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18654 
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Reported By:                Docent
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18654
Category:                   Features
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           SVN 
JIRA:                       SWP-3085 
Regression:                 Yes 
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:             2011-01-21 01:16 CST
Last Modified:              2011-04-17 04:19 CDT
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Summary:                    [patch] [regression] Call Pickup Hangs Asterisk
(deadlock?)
Description: 
Asterisk stops to service new calls when someone tries to pickup a call by
pressing *8. Some existing calls are also terminated, although others
continue to work. I still can run any command in the console, but I can't
stop or kill Asterisk. I can kill it only with -9 flag.
I found this trouble in versions 1.8.1, 1.8.2 and SVN.
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Relationships       ID      Summary
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has duplicate       0018906 Deadlock using pickup extension
has duplicate       0018955 after picking up a call, phones stop wo...
has duplicate       0019092 Calls getting stuck when dialing *8
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 (0133848) alecdavis (manager) - 2011-04-17 04:19
 https://issues.asterisk.org/view.php?id=18654#c133848 
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bug18654.diff2.txt
fixes the sip-a to dahdi-b with dahdi-c attempt to pickup dahdi-b

taking inspiration from app_directed_pickup.c where all of the pickup
routines keep the target locked until just before the unref<pre>
if (target) {
    res = pickup_do(chan, target);
    ast_channel_unlock(target);
    target = ast_channel_unref(target);
}</pre> 

Issue History 
Date Modified    Username       Field                    Change               
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2011-04-17 04:19 alecdavis      Note Added: 0133848                          
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