=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 140712912996096 (do_devstate_changes  started at [  724] devicestate.c ast_device_state_engine_init())
=== ---> Lock #0 (astobj2.c): MUTEX 657 internal_ao2_callback c 0xd08ce0 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_lock+0xaf) [0x4e17dd]
	asterisk(__ao2_lock+0x5a) [0x4442ac]
	asterisk() [0x444fbc]
	asterisk(__ao2_callback+0x5f) [0x44548d]
	asterisk(__ao2_find+0x31) [0x4455ff]
	asterisk() [0x46c502]
	asterisk(ast_channel_get_by_name_prefix+0x2e) [0x46c5f7]
	asterisk(ast_parse_device_state+0x58) [0x49f2c0]
	asterisk() [0x49f601]
	asterisk() [0x49fa95]
	asterisk() [0x49ff55]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== ---> Waiting for Lock #1 (channel.c): MUTEX 1641 ast_channel_cmp_cb chan 0x71c3d10 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_trylock+0xaf) [0x4e1b63]
	asterisk(__ao2_trylock+0x5a) [0x44436e]
	/usr/lib/asterisk/modules/chan_sip.so(+0x8072a) [0x7ffa4009072a]
	asterisk(ast_sched_runq+0x19a) [0x54c7a5]
	/usr/lib/asterisk/modules/chan_sip.so(+0x82bd6) [0x7ffa40092bd6]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== --- ---> Locked Here: channel.c line 3636 (__ast_read)
=== -------------------------------------------------------------------
===
=== Thread ID: 140712468190976 (do_monitor           started at [24497] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 23991 handle_request_do &netlock 0x7ffa402dcf80 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_lock+0xaf) [0x4e17dd]
	/usr/lib/asterisk/modules/chan_sip.so(+0x80e33) [0x7ffa40090e33]
	/usr/lib/asterisk/modules/chan_sip.so(+0x80c14) [0x7ffa40090c14]
	asterisk(ast_io_wait+0x1c4) [0x4dbaa8]
	/usr/lib/asterisk/modules/chan_sip.so(+0x82b24) [0x7ffa40092b24]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== ---> Waiting for Lock #1 (astobj2.c): MUTEX 493 internal_ao2_link c 0xd08ce0 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_lock+0xaf) [0x4e17dd]
	asterisk(__ao2_lock+0x5a) [0x4442ac]
	asterisk() [0x444ac0]
	asterisk(__ao2_link+0x34) [0x444c78]
	asterisk() [0x46ad6b]
	asterisk(__ast_channel_alloc+0x16e) [0x46b142]
	/usr/lib/asterisk/modules/chan_sip.so(+0x2520f) [0x7ffa4003520f]
	/usr/lib/asterisk/modules/chan_sip.so(+0x75e4d) [0x7ffa40085e4d]
	/usr/lib/asterisk/modules/chan_sip.so(+0x800b8) [0x7ffa400900b8]
	/usr/lib/asterisk/modules/chan_sip.so(+0x81399) [0x7ffa40091399]
	/usr/lib/asterisk/modules/chan_sip.so(+0x80c14) [0x7ffa40090c14]
	asterisk(ast_io_wait+0x1c4) [0x4dbaa8]
	/usr/lib/asterisk/modules/chan_sip.so(+0x82b24) [0x7ffa40092b24]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== --- ---> Locked Here: astobj2.c line 657 (internal_ao2_callback)
=== -------------------------------------------------------------------
===
=== Thread ID: 140712462018304 (pbx_thread           started at [ 5035] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 3636 __ast_read chan 0x71c3d10 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_lock+0xaf) [0x4e17dd]
	asterisk(__ao2_lock+0x5a) [0x4442ac]
	asterisk() [0x47187e]
	asterisk(ast_read+0x1d) [0x473ddb]
	asterisk(ast_safe_sleep_conditional+0xdf) [0x46c760]
	asterisk(ast_safe_sleep+0x2b) [0x46c8fe]
	/usr/lib/asterisk/modules/res_musiconhold.so(+0x5528) [0x7ffa463f8528]
	asterisk(pbx_exec+0x1fb) [0x50198c]
	/usr/lib/asterisk/modules/res_agi.so(+0xb49e) [0x7ffa46c2149e]
	/usr/lib/asterisk/modules/res_agi.so(+0xe186) [0x7ffa46c24186]
	/usr/lib/asterisk/modules/res_agi.so(+0xec64) [0x7ffa46c24c64]
	/usr/lib/asterisk/modules/res_agi.so(+0x1018c) [0x7ffa46c2618c]
	/usr/lib/asterisk/modules/res_agi.so(+0x102e3) [0x7ffa46c262e3]
	asterisk(pbx_exec+0x1fb) [0x50198c]
	asterisk() [0x50b8a7]
	asterisk(ast_spawn_extension+0x65) [0x50d2e9]
	asterisk() [0x50dd72]
	asterisk() [0x50f9b0]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== -------------------------------------------------------------------
===
=== Thread ID: 140712461510400 (pbx_thread           started at [ 5035] pbx.c ast_pbx_start())
=== ---> Waiting for Lock #0 (astobj2.c): MUTEX 657 internal_ao2_callback c 0xd08ce0 (1)
	asterisk(ast_bt_get_addresses+0x1d) [0x4e89a6]
	asterisk(__ast_pthread_mutex_lock+0xaf) [0x4e17dd]
	asterisk(__ao2_lock+0x5a) [0x4442ac]
	asterisk() [0x444ac0]
	asterisk(__ao2_link+0x34) [0x444c78]
	asterisk() [0x46ad6b]
	asterisk(__ast_channel_alloc+0x16e) [0x46b142]
	/usr/lib/asterisk/modules/chan_sip.so(+0x2520f) [0x7ffa4003520f]
	/usr/lib/asterisk/modules/chan_sip.so(+0x75e4d) [0x7ffa40085e4d]
	/usr/lib/asterisk/modules/chan_sip.so(+0x800b8) [0x7ffa400900b8]
	/usr/lib/asterisk/modules/chan_sip.so(+0x81399) [0x7ffa40091399]
	/usr/lib/asterisk/modules/chan_sip.so(+0x80c14) [0x7ffa40090c14]
	asterisk(ast_io_wait+0x1c4) [0x4dbaa8]
	/usr/lib/asterisk/modules/chan_sip.so(+0x82b24) [0x7ffa40092b24]
	asterisk() [0x56844e]
	/lib/libpthread.so.0(+0x69ca) [0x7ffa47eac9ca]
	/lib/libc.so.6(clone+0x6d) [0x7ffa486fd70d]
=== --- ---> Locked Here: astobj2.c line 657 (internal_ao2_callback)
=== -------------------------------------------------------------------
===
=======================================================================

Asterisk ending (0).