Deadlock  situation :	lock A  is waiting for lock B	and 	lock B is waiting for lock A

=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 139896780806480 (pri_dchannel         started at [ 3982] sig_pri.c sig_pri_start_pri())
=== ---> Lock #0 (chan_dahdi.c): MUTEX 1998 my_lock_private &p->lock 0xd10b68 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f42d8d]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f43b21]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f89051]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f8f848]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Waiting for Lock #1 (astobj2.c): MUTEX 517 internal_ao2_link c 0x7f3c5c123808 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44798c]
        /usr/sbin/asterisk(__ao2_lock+0x62) [0x447825]
        /usr/sbin/asterisk [0x44982f]
        /usr/sbin/asterisk(__ao2_link+0x2d) [0x4499e3]
        /usr/sbin/asterisk [0x471a27]
        /usr/sbin/asterisk(__ast_channel_alloc+0x196) [0x472060]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f5c2dd]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f44a1d]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f8979a]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f90a4b]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== --- ---> Locked Here: astobj2.c line 676 (internal_ao2_callback)
=== -------------------------------------------------------------------
===
=== Thread ID: 139896780298576 (do_monitor           started at [10793] chan_dahdi.c restart_monitor())
=== ---> Lock #0 (chan_dahdi.c): MUTEX 10524 do_monitor &iflock 0x7f3c441acec0 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f42d8d]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f65f04]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Waiting for Lock #1 (chan_dahdi.c): MUTEX 10542 do_monitor &i->lock 0xd10b68 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f42d8d]
        /usr/lib/asterisk/modules/chan_dahdi.so [0x7f3c43f6600b]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== --- ---> Locked Here: chan_dahdi.c line 1998 (my_lock_private)
=== -------------------------------------------------------------------
===
=== Thread ID: 139896768534864 (do_monitor           started at [23651] chan_sip.c restart_monitor())
=== ---> Lock #0 (chan_sip.c): MUTEX 23108 handle_request_do &netlock 0x7f3c42684380 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c423de02a]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244de7b]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244dc1b]
        /usr/sbin/asterisk(ast_io_wait+0x1ba) [0x4ee477]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244fd91]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #1 (chan_sip.c): MUTEX 7625 find_call sip_pvt_ptr 0x7ddbd98 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44798c]
        /usr/sbin/asterisk(__ao2_lock+0x62) [0x447825]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c423f6272]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244de8f]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244dc1b]
        /usr/sbin/asterisk(ast_io_wait+0x1ba) [0x4ee477]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244fd91]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #2 (astobj2.c): MUTEX 676 internal_ao2_callback c 0x7f3c5c123808 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44798c]
        /usr/sbin/asterisk(__ao2_lock+0x62) [0x447825]
        /usr/sbin/asterisk [0x449d58]
        /usr/sbin/asterisk(__ao2_callback+0x59) [0x44a2d4]
        /usr/sbin/asterisk(__ao2_find+0x2b) [0x44a42d]
        /usr/sbin/asterisk [0x4733b9]
        /usr/sbin/asterisk(ast_channel_get_by_name_prefix+0x27) [0x4734d0]
        /usr/sbin/asterisk(ast_parse_device_state+0x3d) [0x4a233c]
        /usr/sbin/asterisk [0x4a265d]
        /usr/sbin/asterisk(ast_device_state+0x1a) [0x4a2685]
        /usr/sbin/asterisk [0x521982]
        /usr/sbin/asterisk(ast_extension_state+0x42) [0x521a53]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244b8d2]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244d282]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244e41c]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244dc1b]
        /usr/sbin/asterisk(ast_io_wait+0x1ba) [0x4ee477]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244fd91]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Waiting for Lock #3 (channel.c): MUTEX 1323 ast_channel_cmp_cb chan 0x8b12978 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44798c]
        /usr/sbin/asterisk(__ao2_lock+0x62) [0x447825]
        /usr/sbin/asterisk [0x472f34]
        /usr/sbin/asterisk [0x449e94]
        /usr/sbin/asterisk(__ao2_callback+0x59) [0x44a2d4]
        /usr/sbin/asterisk(__ao2_find+0x2b) [0x44a42d]
        /usr/sbin/asterisk [0x4733b9]
        /usr/sbin/asterisk(ast_channel_get_by_name_prefix+0x27) [0x4734d0]
        /usr/sbin/asterisk(ast_parse_device_state+0x3d) [0x4a233c]
        /usr/sbin/asterisk [0x4a265d]
        /usr/sbin/asterisk(ast_device_state+0x1a) [0x4a2685]
        /usr/sbin/asterisk [0x521982]
        /usr/sbin/asterisk(ast_extension_state+0x42) [0x521a53]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244b8d2]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244d282]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244e41c]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244dc1b]
        /usr/sbin/asterisk(ast_io_wait+0x1ba) [0x4ee477]
        /usr/lib/asterisk/modules/chan_sip.so [0x7f3c4244fd91]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== --- ---> Locked Here: chan_local.c line 307 (check_bridge)
=== --- ---> Locked Here: channel.c line 4774 (ast_channel_masquerade)
=== -------------------------------------------------------------------
===
=== Thread ID: 139896763455824 (pbx_thread           started at [ 4924] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 3897 ast_write chan 0x8a92728 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44880c]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x44873c]
        /usr/sbin/asterisk(ast_write+0xfd) [0x47acc5]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #1 (chan_local.c): MUTEX 374 local_write &p->lock 0x8b0ccc8 (1)				lock A
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336a75c]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c780]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Waiting for Lock #2 (chan_local.c): MUTEX 192 local_bridgedchannel &p->lock 0x8b609f8 (1)		lock B
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336a75c]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336bb16]
        /usr/sbin/asterisk(ast_bridged_channel+0x4a) [0x482d1b]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c47a]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c7c1]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== --- ---> Locked Here: chan_local.c line 374 (local_write)
=== -------------------------------------------------------------------
===
=== Thread ID: 139896762440016 (pbx_thread           started at [ 4924] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 3897 ast_write chan 0x8b31b38 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44880c]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x44873c]
        /usr/sbin/asterisk(ast_write+0xfd) [0x47acc5]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #1 (chan_local.c): MUTEX 374 local_write &p->lock 0x8b609f8 (1)				lock B
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336a75c]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c780]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #2 (chan_local.c): MUTEX 307 check_bridge p->chan->_bridge 0x8b12978 (2)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44880c]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x44873c]
        /usr/sbin/asterisk(ast_channel_masquerade+0xac) [0x47e4dc]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c687]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c7c1]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Lock #3 (chan_local.c): MUTEX 309 check_bridge p->owner 0x8aa5728 (2)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/sbin/asterisk [0x44798c]
        /usr/sbin/asterisk(__ao2_lock+0x62) [0x447825]
        /usr/sbin/asterisk(ast_channel_masquerade+0x46) [0x47e476]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c687]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c7c1]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== ---> Waiting for Lock #4 (chan_local.c): MUTEX 192 local_bridgedchannel &p->lock 0x8b0ccc8 (1)		lock A
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4fa9ec]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336a75c]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336bb16]
        /usr/sbin/asterisk(ast_bridged_channel+0x4a) [0x482d1b]
        /usr/sbin/asterisk(ast_channel_masquerade+0xce) [0x47e4fe]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c687]
        /usr/lib/asterisk/modules/chan_local.so [0x7f3c5336c7c1]
        /usr/sbin/asterisk(ast_write+0x11d8) [0x47bda0]
        /usr/sbin/asterisk [0x4837e1]
        /usr/sbin/asterisk(ast_channel_bridge+0x17bf) [0x485a69]
        /usr/sbin/asterisk(ast_bridge_call+0x1018) [0x4c9317]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e093c2c]
        /usr/lib/asterisk/modules/app_dial.so [0x7f3c4e095486]
        /usr/sbin/asterisk(pbx_exec+0x2c3) [0x515d1e]
        /usr/sbin/asterisk [0x521192]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x522ba3]
        /usr/sbin/asterisk [0x52332a]
        /usr/sbin/asterisk [0x52562f]
        /usr/sbin/asterisk [0x5833c9]
        /lib/libpthread.so.0 [0x7f3c62970faa]
        /lib/libc.so.6(clone+0x6d) [0x7f3c631a729d]
=== --- ---> Locked Here: chan_local.c line 374 (local_write)
=== -------------------------------------------------------------------
===
=======================================================================

root@astdez2:/var/log/asterisk#