[Feb 16 18:32:54] ERROR[3039]: /root/src/asterisk-r103729/include/asterisk/lock.h:278 __ast_pthread_mutex_destroy: chan_sip.c line 4222 (__sip_destroy): Error: attempt to destroy locked mutex '&p->pvt_lock'.
[Feb 16 18:32:54] ERROR[3039]: /root/src/asterisk-r103729/include/asterisk/lock.h:281 __ast_pthread_mutex_destroy: chan_sip.c line 5738 (find_call): Error: '&p->pvt_lock' was locked here.
[Feb 16 18:32:54] ERROR[3039]: /root/src/asterisk-r103729/include/asterisk/lock.h:288 __ast_pthread_mutex_destroy: chan_sip.c line 4222 (__sip_destroy): Error destroying mutex &p->pvt_lock: Device or resource busy
*CLI>
Disconnected from Asterisk server

(gdb) thread apply all bt

Thread 1 (process 3053):
#0  0xb79a41f2 in sip_scheddestroy (p=0x8271338, ms=32000) at chan_sip.c:2900
#1  0xb79c5bb9 in check_auth (p=0x8271338, req=0xb7614f58, username=0x8212908 "726", secret=xxxx, md5secret=xxxxx "", sipmethod=2,
    uri=0xb7615185 "sip:xx.xx.xx:5061", reliable=XMIT_UNRELIABLE, ignore=0) at chan_sip.c:9942
#2  0xb79c661f in register_verify (p=0x8271338, sin=0x8240508, req=0xb7614f58, uri=0xb7615185 "sip:xxx.xxx.xxx:5061") at chan_sip.c:10133
#3  0xb79ec4bb in handle_request_register (p=0x8271338, req=0xb7614f58, sin=0x8240508, e=0xb7615185 "sip:xx.xx.xx:5061") at chan_sip.c:17535
#4  0xb79ed314 in handle_incoming (p=0x8271338, req=0xb7614f58, sin=0x8240508, recount=0xb76138cc, nounlock=0xb76138c8) at chan_sip.c:17754
#5  0xb79eddb4 in handle_request_do (req=0xb7614f58, sin=0x8240508) at chan_sip.c:17905
#6  0xb79a014c in _sip_tcp_helper_thread (pvt=0x0, ser=0x82404f0) at chan_sip.c:2218
#7  0xb799fbcb in sip_tcp_worker_fn (data=0x82404f0) at chan_sip.c:2142
#8  0x08139438 in ast_make_file_from_fd (data=0x82404f0) at tcptls.c:457
#9  0x08145b7d in dummy_start (data=0x82413c0) at utils.c:857
#10 0xb7c3b462 in start_thread () from /lib/i686/libpthread.so.0
#11 0xb7d2082e in clone () from /lib/i686/libc.so.6