[asterisk-bugs] [Asterisk 0019349]: [patch] Deadlock ast_channel_cmp_cb

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=19349 
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Reported By:                irroot
Assigned To:                
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Project:                    Asterisk
Issue ID:                   19349
Category:                   Core/Channels
Reproducibility:            random
Severity:                   major
Priority:                   normal
Status:                     confirmed
Asterisk Version:           1.8.4 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.8 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2011-05-23 08:48 CDT
Last Modified:              2011-05-23 10:19 CDT
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Summary:                    [patch] Deadlock ast_channel_cmp_cb
Description: 
=== Thread ID: 0xac887b70 (do_monitor           started at [24921]
chan_sip.c restart_monitor())
=== ---> Lock https://issues.asterisk.org/view.php?id=0 (chan_sip.c): MUTEX
24445 handle_request_do &netlock
0xb3a67a20 (1)
=== ---> Lock https://issues.asterisk.org/view.php?id=1 (chan_sip.c): MUTEX
22757 handle_request_refer p
0xb6b06b8 (1)
=== ---> Lock https://issues.asterisk.org/view.php?id=2 (pbx.c): MUTEX 7830
ast_async_goto chan 0xb636778 (1)
=== ---> Waiting for Lock https://issues.asterisk.org/view.php?id=3 (astobj2.c):
MUTEX 493 internal_ao2_link c
0xb71875e0 (1)
=== --- ---> Locked Here: astobj2.c line 657 (internal_ao2_callback)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xaac87b70 (pbx_thread           started at [ 5083] pbx.c
ast_pbx_start())
=== ---> Lock https://issues.asterisk.org/view.php?id=0 (cdr.c): RDLOCK 1131
post_cdr &(&be_list)->lock 0x81f3188
(1)
=== ---> Waiting for Lock https://issues.asterisk.org/view.php?id=1 (astobj2.c):
MUTEX 657 internal_ao2_callback
c 0xb71875e0 (1)
=== --- ---> Locked Here: astobj2.c line 657 (internal_ao2_callback)
=== -------------------------------------------------------------------
===
=== Thread ID: 0xaacffb70 (pbx_thread           started at [ 5083] pbx.c
ast_pbx_start())
=== ---> Lock https://issues.asterisk.org/view.php?id=0 (astobj2.c): MUTEX 657
internal_ao2_callback c 0xb71875e0
(1)
=== ---> Waiting for Lock https://issues.asterisk.org/view.php?id=1 (channel.c):
MUTEX 1641 ast_channel_cmp_cb
chan 0xb636778 (1)
=== --- ---> Locked Here: pbx.c line 7830 (ast_async_goto)
=== -------------------------------------------------------------------
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Issue History 
Date Modified    Username       Field                    Change               
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2011-05-23 10:19 lmadsen        Description Updated                          
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