[asterisk-bugs] [Asterisk 0018403]: [patch] Deadlock on SIP blind transfer (REFER)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18403 
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Reported By:                jthurman
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18403
Category:                   Channels/chan_sip/Transfers
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                       SWP-2667 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.8 
SVN Revision (number only!): 296824 
Request Review:              
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Date Submitted:             2010-11-30 18:25 CST
Last Modified:              2010-12-22 10:37 CST
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Summary:                    [patch] Deadlock on SIP blind transfer (REFER)
Description: 
All SIP:
- A calls B
- B blind-transfers A to C (Using REFER)
- Asterisk stops responding to SIP requests (Deadlocked)

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 (0129889) jthurman (reporter) - 2010-12-22 10:37
 https://issues.asterisk.org/view.php?id=18403#c129889 
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After some more in-depth testing, it appears that the
20101221-blind_deadlock.diff patch fixes the initial deadlock issue that I
was seeing.  However, I am still able to get random deadlocks in chan_sip,
but they are happening before handle_request_refer.  After application of
this patch there are no locks left after a transfer that could be cascading
to the next deadlock, so it is probably a different issue. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-12-22 10:37 jthurman       Note Added: 0129889                          
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