Thread 9 (Thread 0xb5bf7b70 (LWP 22029)):
#0  0xb77b5424 in __kernel_vsyscall ()
#1  0xb7529c89 in __lll_lock_wait () from /lib/i686/cmov/libpthread.so.0
#2  0xb7525099 in _L_lock_839 () from /lib/i686/cmov/libpthread.so.0
#3  0xb7524f2b in pthread_mutex_lock () from /lib/i686/cmov/libpthread.so.0
#4  0xb773e316 in pthread_mutex_lock () from /lib/i686/cmov/libc.so.6
#5  0x08116753 in __ast_pthread_mutex_lock (filename=0xb68ea2d4 "chan_sip.c", lineno=18859, func=0xb690157a "show_channels_cb", mutex_name=0xb68f5707 "cur",
    t=0xb6381078) at lock.c:248
#6  0x08085b1c in __ao2_lock (user_data=0xb63810a8, file=0xb68ea2d4 "chan_sip.c", func=0xb690157a "show_channels_cb", line=18859, var=0xb68f5707 "cur")
    at astobj2.c:162
#7  0xb68a3dd5 in show_channels_cb (__cur=0xb63810a8, __arg=0xb5bf6734, flags=2) at chan_sip.c:18859
#8  0x08086717 in internal_ao2_callback (c=0xa2ef578, flags=OBJ_NODATA, cb_fn=0xb68a3d81, arg=0xb5bf6734, data=0x0, type=DEFAULT, tag=0x0, file=0x0, line=0,
    funcname=0x0) at astobj2.c:673
#9  0x08086adc in __ao2_callback (c=0xa2ef578, flags=OBJ_NODATA, cb_fn=0xb68a3d81 <show_channels_cb>, arg=0xb5bf6734) at astobj2.c:773
#10 0xb68a4465 in sip_show_channels (e=0xb6907b60, cmd=-4, a=0xb5bf6774) at chan_sip.c:18930
#11 0x080c8556 in ast_cli_command_full (uid=-1, gid=-1, fd=36, s=0x109820b9 "sip show channels") at cli.c:2543
#12 0x08124fe3 in action_command (s=0xb5bf7280, m=0xb5bf700c) at manager.c:3664
#13 0x08129684 in process_message (s=0xb5bf7280, m=0xb5bf700c) at manager.c:4722
#14 0x08129fa7 in do_message (s=0xb5bf7280) at manager.c:4933
#15 0x0812a45c in session_do (data=0x108965d8) at manager.c:5048
#16 0x08180c89 in handle_tcptls_connection (data=0x108965d8) at tcptls.c:265
#17 0x0818fc0d in dummy_start (data=0x107b0a68) at utils.c:1010
#18 0xb7522955 in start_thread () from /lib/i686/cmov/libpthread.so.0
#19 0xb77311de in clone () from /lib/i686/cmov/libc.so.6

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

Thread 42 (Thread 0xb65a4b70 (LWP 21931)):
#0  0xb77b5424 in __kernel_vsyscall ()
#1  0xb7529c89 in __lll_lock_wait () from /lib/i686/cmov/libpthread.so.0
#2  0xb7525099 in _L_lock_839 () from /lib/i686/cmov/libpthread.so.0
#3  0xb7524f2b in pthread_mutex_lock () from /lib/i686/cmov/libpthread.so.0
#4  0xb773e316 in pthread_mutex_lock () from /lib/i686/cmov/libc.so.6
#5  0x08116753 in __ast_pthread_mutex_lock (filename=0x81be274 "astobj2.c", lineno=497, func=0x81be475 "internal_ao2_link", mutex_name=0x81be370 "c", t=0xa2ef548)
    at lock.c:248
#6  0x08085b1c in __ao2_lock (user_data=0xa2ef578, file=0x81be274 "astobj2.c", func=0x81be475 "internal_ao2_link", line=497, var=0x81be370 "c") at astobj2.c:162
#7  0x080861fc in internal_ao2_link (c=0xa2ef578, user_data=0xb6383d70, file=0x81be274 "astobj2.c", line=521, func=0x81be459 "__ao2_link") at astobj2.c:497
#8  0x0808637d in __ao2_link (c=0xa2ef578, user_data=0xb6383d70) at astobj2.c:521
#9  0xb687106d in sip_alloc (callid=0x0, addr=0x0, useglobal_nat=0, intended_method=4, req=0x0) at chan_sip.c:8183
#10 0xb68c38c2 in sip_send_mwi_to_peer (peer=0xa2ac378, cache_only=0) at chan_sip.c:26292
#11 0xb689151c in register_verify (p=0xb63810a8, addr=0xb65a3ca8, req=0xb65a3d2c, uri=0xb630de9d "sip:192.168.32.189:5060") at chan_sip.c:15412
#12 0xb68c0e77 in handle_request_register (p=0xb63810a8, req=0xb65a3d2c, addr=0xb65a3ca8, e=0xb630de9d "sip:192.168.32.189:5060") at chan_sip.c:25546
#13 0xb68c21c5 in handle_incoming (p=0xb63810a8, req=0xb65a3d2c, addr=0xb65a3ca8, recount=0xb65a3c44, nounlock=0xb65a3c40) at chan_sip.c:25828
#14 0xb68c2aa9 in handle_request_do (req=0xb65a3d2c, addr=0xb65a3ca8) at chan_sip.c:25992
#15 0xb68c26bd in sipsock_read (id=0xb6300df8, fd=13, events=1, ignore=0x0) at chan_sip.c:25926
#16 0x081111a4 in ast_io_wait (ioc=0xa2a8838, howlong=492) at io.c:292
#17 0xb68c4457 in do_monitor (data=0x0) at chan_sip.c:26478
#18 0x0818fc0d in dummy_start (data=0xa26fd90) at utils.c:1010
#19 0xb7522955 in start_thread () from /lib/i686/cmov/libpthread.so.0
#20 0xb77311de in clone () from /lib/i686/cmov/libc.so.6