[asterisk-bugs] [Asterisk 0013505]: Memory leak in channel variables

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13505 
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Reported By:                mav3rick
Assigned To:                Corydon76
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Project:                    Asterisk
Issue ID:                   13505
Category:                   Channels/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 143334 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-09-17 11:06 CDT
Last Modified:              2008-09-18 04:25 CDT
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Summary:                    Memory leak in channel variables
Description: 
I detected the leak on Asterisk 1.4.21.2. I reproduced the bug easily on
the SVN trunk version. 

After 5000 calls, Asterisk is using more than 500Mb. 

I recompiled with MALLOC_DEBUG (and DONT_OPTIMIZE), and after around 500
calls I found :

661364 bytes in 6321 allocations in file 'config.c'
(numbers increase with calls).

That was the only abnormal allocation (and the only increasing).

All 'config.c' allocations are :

XX bytes allocated in ast_variable_new at line 240 of config.c
(appeared a lot of times with different values).

I added debug to config.c to know which variable was concerned. The only
variables I saw was the variables I set in call files (outgoing calls).

====================================================================== 

---------------------------------------------------------------------- 
 (0092655) pj (reporter) - 2008-09-18 04:25
 http://bugs.digium.com/view.php?id=13505#c92655 
---------------------------------------------------------------------- 
Asterisk SVN-trunk-r143405 + 20080917__bug13505__trunk__debug.diff.txt
allocation in config.c isn't growing anymore (still 10 allocations) after
22 calls processed, but instead, another modules starts leaking, mainly
chan_sip, and pbx.c, mmlog is clean
example of possible leaking modules:

        55 bytes allocated in            copy_vars at line 11725 of
chan_sip.c
        63 bytes allocated in            copy_vars at line 11725 of
chan_sip.c
        63 bytes allocated in            copy_vars at line 11725 of
chan_sip.c
        55 bytes allocated in            copy_vars at line 11725 of
chan_sip.c

        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c
        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c
        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c
        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c
        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c
        28 bytes allocated in     add_pattern_node at line  1430 of pbx.c 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2008-09-18 04:25 pj             Note Added: 0092655                          
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