=== Thread ID: 0x7f5df40e6700 (do_monitor           started at [28958] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 28366 handle_request_do &netlock 0x7f5de04b5400 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x5107aa]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xe0) [0x508417]
        /usr/lib/asterisk/modules/chan_sip.so(+0x9753d) [0x7f5de025b53d]
        /usr/lib/asterisk/modules/chan_sip.so(+0x97323) [0x7f5de025b323]
        /usr/sbin/asterisk(ast_io_wait+0x193) [0x501f0a]
        /usr/lib/asterisk/modules/chan_sip.so(+0x99359) [0x7f5de025d359]
        /usr/sbin/asterisk() [0x5a38c1]
        /lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a) [0x7f5e2f48fe9a]
        /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7f5e305d53fd]
=== ---> Lock #1 (chan_sip.c): MUTEX 9081 sip_pvt_lock_full pvt 0x7f5df0cd5340 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1d) [0x5107aa]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xe0) [0x508417]
        /usr/sbin/asterisk(__ao2_lock+0x93) [0x44d965]
        /usr/lib/asterisk/modules/chan_sip.so(+0x31b05) [0x7f5de01f5b05]
        /usr/lib/asterisk/modules/chan_sip.so(+0x97640) [0x7f5de025b640]
        /usr/lib/asterisk/modules/chan_sip.so(+0x97323) [0x7f5de025b323]
        /usr/sbin/asterisk(ast_io_wait+0x193) [0x501f0a]
        /usr/lib/asterisk/modules/chan_sip.so(+0x99359) [0x7f5de025d359]
        /usr/sbin/asterisk() [0x5a38c1]
        /lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a) [0x7f5e2f48fe9a]
        /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d) [0x7f5e305d53fd]
=== -------------------------------------------------------------------