=== Thread ID: -1215845488 (do_monitor           started at [22042] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 21559 handle_request_do &netlock 0xb79734e0 (1)
        asterisk(ast_bt_get_addresses+0x19) [0x8106e62]
        /usr/lib/asterisk/modules/chan_sip.so [0xb78e79af]
        /usr/lib/asterisk/modules/chan_sip.so [0xb79459a2]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7945740]
        asterisk(ast_io_wait+0x14d) [0x80fcebb]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7947588]
        asterisk [0x817792a]
        /lib/i686/libpthread.so.0 [0xb7bdb315]
        /lib/i686/libc.so.6(clone+0x5e) [0xb7e5a25e]
=== ---> Lock #1 (chan_sip.c): MUTEX 7008 find_call sip_pvt_ptr 0x9f51410 (1)
        asterisk(ast_bt_get_addresses+0x19) [0x8106e62]
        asterisk [0x807f510]
        asterisk(__ao2_lock+0x4a) [0x807f3c8]
        /usr/lib/asterisk/modules/chan_sip.so [0xb78fc282]
        /usr/lib/asterisk/modules/chan_sip.so [0xb79459be]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7945740]
        asterisk(ast_io_wait+0x14d) [0x80fcebb]
        /usr/lib/asterisk/modules/chan_sip.so [0xb7947588]
        asterisk [0x817792a]
        /lib/i686/libpthread.so.0 [0xb7bdb315]
        /lib/i686/libc.so.6(clone+0x5e) [0xb7e5a25e]
=== -------------------------------------------------------------------