=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 139672203400976 (do_monitor           started at [24411] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 23903 handle_request_do &netlock 0x7f07eb94df80 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f75d) [0x7f07eb70175d]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f53e) [0x7f07eb70153e]
        /usr/sbin/asterisk(ast_io_wait+0x1c4) [0x4d9172]
        /usr/lib/asterisk/modules/chan_sip.so(+0x814c0) [0x7f07eb7034c0]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== ---> Lock #1 (chan_sip.c): MUTEX 7464 find_call sip_pvt_ptr 0x1e77cc0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/sbin/asterisk(__ao2_lock+0x5a) [0x442188]
        /usr/lib/asterisk/modules/chan_sip.so(+0x29273) [0x7f07eb6ab273]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f777) [0x7f07eb701777]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f53e) [0x7f07eb70153e]
        /usr/sbin/asterisk(ast_io_wait+0x1c4) [0x4d9172]
        /usr/lib/asterisk/modules/chan_sip.so(+0x814c0) [0x7f07eb7034c0]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== ---> Waiting for Lock #2 (pbx.c): MUTEX 9541 pbx_builtin_setvar_helper chan 0x1e9f1e0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/sbin/asterisk(__ao2_lock+0x5a) [0x442188]
        /usr/sbin/asterisk(pbx_builtin_setvar_helper+0xfc) [0x51cd26]
        /usr/lib/asterisk/modules/chan_sip.so(+0x77feb) [0x7f07eb6f9feb]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7ea1c) [0x7f07eb700a1c]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7fcc3) [0x7f07eb701cc3]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f53e) [0x7f07eb70153e]
        /usr/sbin/asterisk(ast_io_wait+0x1c4) [0x4d9172]
        /usr/lib/asterisk/modules/chan_sip.so(+0x814c0) [0x7f07eb7034c0]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== --- ---> Locked Here: channel.c line 4661 (ast_write)
=== -------------------------------------------------------------------
===
=== Thread ID: 139671696987920 (pbx_thread           started at [ 5035] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 4661 ast_write chan 0x1e9f1e0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/sbin/asterisk(__ao2_lock+0x5a) [0x442188]
        /usr/sbin/asterisk(pbx_builtin_setvar_helper+0xfc) [0x51cd26]
        /usr/lib/asterisk/modules/chan_sip.so(+0x77feb) [0x7f07eb6f9feb]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7ea1c) [0x7f07eb700a1c]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7fcc3) [0x7f07eb701cc3]
        /usr/lib/asterisk/modules/chan_sip.so(+0x7f53e) [0x7f07eb70153e]
        /usr/sbin/asterisk(ast_io_wait+0x1c4) [0x4d9172]
        /usr/lib/asterisk/modules/chan_sip.so(+0x814c0) [0x7f07eb7034c0]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== ---> Waiting for Lock #1 (chan_sip.c): MUTEX 6047 sip_write p 0x1e77cc0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/sbin/asterisk(__ao2_lock+0x5a) [0x442188]
        /usr/lib/asterisk/modules/chan_sip.so(+0x224fa) [0x7f07eb6a44fa]
        /usr/sbin/asterisk(ast_write+0x132f) [0x473e5f]
        /usr/sbin/asterisk() [0x47c276]
        /usr/sbin/asterisk(ast_channel_bridge+0x1635) [0x47e1ed]
        /usr/sbin/asterisk(ast_bridge_call+0xdf9) [0x4ba825]
        /usr/lib/asterisk/modules/app_queue.so(+0x1a1d0) [0x7f07e5eb71d0]
        /usr/lib/asterisk/modules/app_queue.so(+0x1e263) [0x7f07e5ebb263]
        /usr/sbin/asterisk(pbx_exec+0x1fb) [0x4ff014]
        /usr/sbin/asterisk() [0x508f1a]
        /usr/sbin/asterisk(ast_spawn_extension+0x65) [0x50a95c]
        /usr/sbin/asterisk() [0x50b3e5]
        /usr/sbin/asterisk() [0x50d023]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== --- ---> Locked Here: chan_sip.c line 7464 (find_call)
=== -------------------------------------------------------------------
===
=== Thread ID: 139671695972112 (handle_tcptls_connection started at [  274] tcptls.c ast_tcptls_server_root())
=== ---> Waiting for Lock #0 (manager.c): MUTEX 3132 action_status c 0x1e9f1e0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x4e6043]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xaf) [0x4dee95]
        /usr/sbin/asterisk(__ao2_lock+0x5a) [0x442188]
        /usr/sbin/asterisk() [0x4edc6a]
        /usr/sbin/asterisk() [0x4f33b2]
        /usr/sbin/asterisk() [0x4f39cb]
        /usr/sbin/asterisk() [0x4f3db1]
        /usr/sbin/asterisk() [0x555ce6]
        /usr/sbin/asterisk() [0x566642]
        /lib/libpthread.so.0(+0x7971) [0x7f07fb6c7971]
        /lib/libc.so.6(clone+0x6d) [0x7f07fbf1594d]
=== --- ---> Locked Here: channel.c line 4661 (ast_write)
=== -------------------------------------------------------------------
===
=======================================================================