=== Thread ID: -1215513712 (do_monitor           started at [19604] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 19148 handle_request_do &netlock 0xb79acc40 (1)
        asterisk(ast_bt_get_addresses+0x19) [0x80f786e]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7936288]
        /usr/lib/asterisk/modules/chan_sip.so [0xb79857e6]
        /usr/lib/asterisk/modules/chan_sip.so [0xb798557e]
        asterisk(ast_io_wait+0x14d) [0x80ed491]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7986fc1]
        asterisk [0x816d034]
        /lib/i686/libpthread.so.0 [0xb7c31315]
        /lib/i686/libc.so.6(clone+0x5e) [0xb7d1fdde]
=== ---> Lock #1 (astobj2.c): MUTEX 153 ao2_lock &p->priv_data.lock 0x837ab00 (1)
        asterisk(ast_bt_get_addresses+0x19) [0x80f786e]
        asterisk [0x807d21c]
        asterisk(ao2_lock+0x4e) [0x807d0df]
        /usr/lib/asterisk/modules/chan_sip.so [0xb794836f]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7985802]
        /usr/lib/asterisk/modules/chan_sip.so [0xb798557e]
        asterisk(ast_io_wait+0x14d) [0x80ed491]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7986fc1]
        asterisk [0x816d034]
        /lib/i686/libpthread.so.0 [0xb7c31315]
        /lib/i686/libc.so.6(clone+0x5e) [0xb7d1fdde]
=== ---> Lock #2 (pbx.c): RDLOCK 8477 ast_rdlock_contexts &conlock 0x81ef100 (1)
        asterisk(ast_bt_get_addresses+0x19) [0x80f786e]
        asterisk [0x810a01a]
        asterisk(ast_rdlock_contexts+0x32) [0x8122d21]
        asterisk [0x81155b5]
        asterisk(ast_add_extension+0x18) [0x811c6c0]
        asterisk(ast_extension_state_add+0x27e) [0x81123d0]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7983ad4]
        /usr/lib/asterisk/modules/chan_sip.so [0xb798507f]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7985c1c]
        /usr/lib/asterisk/modules/chan_sip.so [0xb798557e]
        asterisk(ast_io_wait+0x14d) [0x80ed491]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7986fc1]
        asterisk [0x816d034]
        /lib/i686/libpthread.so.0 [0xb7c31315]
        /lib/i686/libc.so.6(clone+0x5e) [0xb7d1fdde]
=== -------------------------------------------------------------------
===