[asterisk-bugs] [Asterisk 0016257]: [patch] Memory leak in res_config_ldap when using realtime extensions

[Asterisk Bug Tracker]

The following issue is now READY FOR TESTING. 
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https://issues.asterisk.org/view.php?id=16257 
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Reported By:                nito
Assigned To:                seanbright
====================================================================== 
Project:                    Asterisk
Issue ID:                   16257
Category:                   Resources/res_config_ldap
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           1.6.0.17 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2009-11-16 17:32 CST
Last Modified:              2010-01-11 16:23 CST
====================================================================== 
Summary:                    [patch] Memory leak in res_config_ldap when using
realtime extensions
Description: 
When using realtime extensions we get a memory leak.

Configuration line

./configure --prefix=/usr/local/asterisk-1.6.0.17 --disable-xmldoc
--sysconfdir=/etc --localstatedir=/var --with-netsnmp

we also tried with make menuconfig selecting dontoptimize and
debug_malloc.

Running with valgrind we get:

--20782-- Command line
--20782--    /usr/local/asterisk/sbin/asterisk
--20782--    -vvvvddddddddcg
--20782-- Startup, with flags:
--20782--    -v
--20782--    --log-file=/tmp/valgrind-1.6.0.17.dontoptimze.out
--20782--    --leak-check=full
--20782--    --trace-children=yes
--20782--    --show-reachable=yes
--20782--    --leak-resolution=high
--20782--    --num-callers=50


and

==20782== 7,307,920 bytes in 30,632 blocks are still reachable in loss
record 2,
151 of 2,151
==20782==    at 0x4C278AE: malloc (vg_replace_malloc.c:207)
==20782==    by 0x43E825: __ast_alloc_region (astmm.c:114)
==20782==    by 0x43E7C4: __ast_calloc (astmm.c:203)
==20782==    by 0x4672D8: ast_variable_new (config.c:214)
==20782==    by 0x919D92C: realtime_ldap_entry_to_var
(res_config_ldap.c:323)
==20782==    by 0x919DA71: realtime_ldap_result_to_vars
(res_config_ldap.c:367)
==20782==    by 0x919F82E: realtime_ldap_base_ap (res_config_ldap.c:817)
==20782==    by 0x919FBCB: realtime_ldap (res_config_ldap.c:902)
==20782==    by 0x46D624: ast_load_realtime_helper (config.c:2045)
==20782==    by 0x46D826: ast_load_realtime (config.c:2068)
==20782==    by 0x165824D2: realtime_switch_common (pbx_realtime.c:93)
==20782==    by 0x16582841: realtime_common (pbx_realtime.c:140)
==20782==    by 0x16582898: realtime_exists (pbx_realtime.c:147)
==20782==    by 0x4BB552: pbx_find_extension (pbx.c:2264)
==20782==    by 0x4BE1D9: pbx_extension_helper (pbx.c:3072)
==20782==    by 0x4BF8A4: ast_exists_extension (pbx.c:3559)
==20782==    by 0x10FA763D: get_destination (chan_sip.c:11474)
==20782==    by 0x10FC7DC9: handle_request_invite (chan_sip.c:17655)
==20782==    by 0x10FCF1A2: handle_incoming (chan_sip.c:19190)
==20782==    by 0x10FD0061: handle_request_do (chan_sip.c:19464)
==20782==    by 0x10FCFA94: sipsock_read (chan_sip.c:19370)
==20782==    by 0x49FCDE: ast_io_wait (io.c:288)
==20782==    by 0x10FD130A: do_monitor (chan_sip.c:19865)
==20782==    by 0x51409A: dummy_start (utils.c:861)
==20782==    by 0x59813B9: start_thread (in /lib/libpthread-2.9.so)
==20782==    by 0x54E9FCC: clone (in /lib/libc-2.9.so)

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

---------------------------------------------------------------------- 
 (0116477) seanbright (manager) - 2010-01-11 16:23
 https://issues.asterisk.org/view.php?id=16257#c116477 
---------------------------------------------------------------------- 
Please test the attached patch and report results.  The patch was made
against 1.6.0.17. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-01-11 16:23 seanbright     Note Added: 0116477                          
2010-01-11 16:23 seanbright     Assigned To              suretec => seanbright
2010-01-11 16:23 seanbright     Status                   assigned => ready for
testing
======================================================================