[asterisk-bugs] [Asterisk 0015143]: Deadlock on chan_sip

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15143 
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Reported By:                cristiandimache
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15143
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.1.0 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-05-18 00:38 CDT
Last Modified:              2009-05-19 13:05 CDT
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Summary:                    Deadlock on chan_sip
Description: 
After a random period of time (around five hours), Asterisk freezes and no
calls can be made and SIP registration is unavailable.
I have compiled with DEBUG_THREADS and attached the output of core show
locks.

At this time, killing Asterisk seems to be the only way to solve the
problem.

I use realtime peers, but I don't think this is an issue here.
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 (0105027) irroot (reporter) - 2009-05-19 13:05
 https://issues.asterisk.org/view.php?id=15143#c105027 
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Ok this may be related to https://issues.asterisk.org/view.php?id=15151 i belive
so due to the following ... not
the most detailed argument for assosiation but i belive a strong one.

the version here is 1.6 and the orig bug i posted is 1.4 so square peg
into round hole time ....

###### The patch allows chan->masq to be pased before checking the FD 

== Thread ID: -1300178032 (pbx_thread started at [ 4045] pbx.c
ast_pbx_start())
=== ---> Lock https://issues.asterisk.org/view.php?id=0 (channel.c): MUTEX 2509
__ast_read (channel lock)
0xb6ac4de8 (1) 

##### See above the lock is while masqurading

=== ---> Lock https://issues.asterisk.org/view.php?id=1 (channel.c): MUTEX 4056
ast_do_masquerade (channel lock)
0xb6a28270 (1) 

##### The lock is generated when the find private returns the struct
locked as per me patch ....

=== ---> Lock https://issues.asterisk.org/view.php?id=1 (chan_sip.c): MUTEX 6464
find_call sip_pvt_ptr 0x83e9ba8
(1)

        /lib/i686/cmov/libc.so.6(clone+0x5e) [0xb707610e]
=== ---> Lock https://issues.asterisk.org/view.php?id=2 (chan_sip.c): MUTEX
19961 handle_request_do (channel
lock) 0x8609ea0 (1) 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-19 13:05 irroot         Note Added: 0105027                          
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