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Summary:ASTERISK-19356: Deadlock in cel_sqlite3_custom module reload
Reporter:Alex Villacís Lasso (a_villacis)Labels:
Date Opened:2012-02-14 11:41:37.000-0600Date Closed:2012-02-14 12:16:19.000-0600
Priority:MajorRegression?No
Status:Closed/CompleteComponents:CEL/cel_sqlite3_custom
Versions:1.8.9.1 1.8.9.2 Frequency of
Occurrence		Frequent
Related
Issues:
Environment:Linux pbx.palosanto.com 2.6.18-238.12.1.el5 #1 SMP Tue May 31 13:22:04 EDT 2011 x86_64 x86_64 x86_64 GNU/LinuxAttachments:
Description:On module reload, cel_sqlite3_custom will incorrectly lock again a lock instead of unlocking it.

A possible way to reproduce:
1) Load cel_sqlite3_custom
2) Reload module at least twice

[root@pbx tmp]# asterisk -rnx 'core show locks'

=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 0x4064a940 (tps_processing_function started at [  451] taskprocessor.c ast_taskprocessor_get())
=== ---> Lock #0 (event.c): RDLOCK 1452 handle_event &(&ast_event_subs[event_types[i]])->lock 0x8348d8 (1)
/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4f2390]
/usr/sbin/asterisk(__ast_rwlock_rdlock+0xf6) [0x4eceae]
/usr/sbin/asterisk [0x4b65f4]
/usr/sbin/asterisk [0x564c5e]
/usr/sbin/asterisk [0x577618]
/lib64/libpthread.so.0 [0x3be5a0673d]
/lib64/libc.so.6(clone+0x6d) [0x3be4ed44bd]
=== ---> Waiting for Lock #1 (cel_sqlite3_custom.c): MUTEX 241 write_cel &lock 0x2aaac7751380 (1)
/usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4f2390]
/usr/sbin/asterisk(__ast_pthread_mutex_lock+0xf6) [0x4eac91]
/usr/lib64/asterisk/modules/cel_sqlite3_custom.so [0x2aaac754fbf9]
/usr/sbin/asterisk [0x4b667b]
/usr/sbin/asterisk [0x564c5e]
/usr/sbin/asterisk [0x577618]
/lib64/libpthread.so.0 [0x3be5a0673d]
/lib64/libc.so.6(clone+0x6d) [0x3be4ed44bd]
=== --- ---> Locked Here: cel_sqlite3_custom.c line 354 (reload)
=== --- ---> Locked Here: cel_sqlite3_custom.c line 356 (reload)
=== -------------------------------------------------------------------
===
=======================================================================
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