Thread 9 (Thread -1218135152 (LWP 16032)):
#0  0x00bba402 in __kernel_vsyscall ()
#1  0x00d06a4e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2  0x00d028c4 in _L_mutex_lock_760 () from /lib/libpthread.so.0
#3  0x00d02768 in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0x001ed5d6 in pthread_mutex_lock () from /lib/libc.so.6
#5  0x08089162 in __ast_pthread_mutex_lock (filename=0x8175854 "channel.c", 
    lineno=974, func=0x8176d57 "ast_queue_frame", 
    mutex_name=0x8176633 "&chan->lock_dont_use", t=0x9a35b98)
    at /usr/src/asterisk-1.6.0.1/include/asterisk/lock.h:427
#6  0x0808b0a3 in ast_queue_frame (chan=0x9a35b18, fin=0xb7645c44)
    at channel.c:974
#7  0x0808b48b in ast_queue_hangup (chan=0x9a35b18) at channel.c:1025
#8  0x0071bd87 in local_hangup (ast=0x99dd998) at chan_local.c:553
#9  0x0808d077 in ast_hangup (chan=0x99dd998) at channel.c:1638
#10 0x00428fd2 in dial_exec_full (chan=0x995a318, data=0xb7648eb8, 
    peerflags=0xb7646d40, continue_exec=0x0) at app_dial.c:1931
#11 0x004299c5 in dial_exec (chan=0x995a318, data=0xb7648eb8)
    at app_dial.c:1964
#12 0x080f0156 in pbx_exec (c=0x995a318, app=0x99cdd68, data=0xb7648eb8)
    at pbx.c:944
#13 0x080f7321 in pbx_extension_helper (c=0x995a318, con=0x0, 
    context=0x995a560 "XXXXXXXXXXXXXXXXXXXXX", exten=0x995a5b0 "001", 
    priority=2, label=0x0, callerid=0x99c07e0 "003", action=E_SPAWN, 
    found=0xb764b2ec, combined_find_spawn=1) at pbx.c:3113
#14 0x080f8ec0 in ast_spawn_extension (c=0x995a318, 
    context=0x995a560 "XXXXXXXXXXXXXXXXXXXXX", exten=0x995a5b0 "001", 
    priority=2, callerid=0x99c07e0 "003", found=0xb764b2ec, 
    combined_find_spawn=1) at pbx.c:3604
#15 0x080f952c in __ast_pbx_run (c=0x995a318) at pbx.c:3690
#16 0x080fa76d in pbx_thread (data=0x995a318) at pbx.c:3954
#17 0x0814983a in dummy_start (data=0x99df2e8) at utils.c:917
#18 0x00d0046b in start_thread () from /lib/libpthread.so.0
#19 0x001e0dbe in clone () from /lib/libc.so.6

Thread 8 (Thread -1218380912 (LWP 16033)):
#0  0x00bba402 in __kernel_vsyscall ()
#1  0x00d06a4e in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#2  0x00d028c4 in _L_mutex_lock_760 () from /lib/libpthread.so.0
#3  0x00d02768 in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0x001ed5d6 in pthread_mutex_lock () from /lib/libc.so.6
#5  0x00719722 in __ast_pthread_mutex_lock (filename=0x71cf64 "chan_local.c", 
    lineno=314, func=0x71d3d2 "local_write", mutex_name=0x71d306 "&p->lock", 
    t=0x9a2c7a8) at /usr/src/asterisk-1.6.0.1/include/asterisk/lock.h:427
#6  0x0071abab in local_write (ast=0x9a35b18, f=0x9a33174) at chan_local.c:314
#7  0x080922aa in ast_write (chan=0x9a35b18, fr=0x99bd928) at channel.c:3168
#8  0x00efa5bc in moh_files_generator (chan=0x9a35b18, data=0x9a560e8, len=0, 
    samples=160) at res_musiconhold.c:318
#9  0x0808d963 in generator_force (data=0x9a35b18) at channel.c:1786
#10 0x0808f2ca in __ast_read (chan=0x9a35b18, dropaudio=0) at channel.c:2464
#11 0x08090bb3 in ast_read (chan=0x9a35b18) at channel.c:2786
#12 0x0053abb9 in agent_ack_sleep (data=0x9974e20) at chan_agent.c:955
#13 0x00540912 in login_exec (chan=0x9a35b18, data=0xb760ceb8)
    at chan_agent.c:2097
#14 0x080f0156 in pbx_exec (c=0x9a35b18, app=0x99a5a40, data=0xb760ceb8)
    at pbx.c:944
#15 0x080f7321 in pbx_extension_helper (c=0x9a35b18, con=0x0, 
    context=0x9a35d60 "XXXXXXXXXXXXXX", exten=0x9a35db0 "001", priority=1, 
    label=0x0, callerid=0x99c8f90 "003", action=E_SPAWN, found=0xb760f2ec, 
    combined_find_spawn=1) at pbx.c:3113
#16 0x080f8ec0 in ast_spawn_extension (c=0x9a35b18, 
    context=0x9a35d60 "XXXXXXXXXXXXXX", exten=0x9a35db0 "001", priority=1, 
    callerid=0x99c8f90 "003", found=0xb760f2ec, combined_find_spawn=1)
    at pbx.c:3604
#17 0x080f952c in __ast_pbx_run (c=0x9a35b18) at pbx.c:3690
#18 0x080fa76d in pbx_thread (data=0x9a35b18) at pbx.c:3954
#19 0x0814983a in dummy_start (data=0x99b65d8) at utils.c:917
#20 0x00d0046b in start_thread () from /lib/libpthread.so.0
#21 0x001e0dbe in clone () from /lib/libc.so.6