[Dec 16 20:35:26]     -- Starting Skinny session from 192.168.31.209
[Dec 16 20:35:26]     -- Device 'SEP000xxxxxxx' successfully registered
[Dec 16 20:35:26] Device capability set to '256'
[Dec 16 20:35:26] Adding button: 9, 1
[Dec 16 20:35:31] WARNING[15662]: chan_skinny.c:1607 find_subchannel_by_instance_reference: Could not find subchannel with reference '21' on 'JP'
*CLI>
Disconnected from Asterisk server

(gdb) bt full
#0  0x080a7541 in __ast_pthread_mutex_lock (filename=0x81b5d94 "channel.c", lineno=968, func=0x81b7373 "__ast_queue_frame", mutex_name=0x81b93a2 "(channel lock)", t=0x4e4f49ec)
    at /root/src/asterisk163715/include/asterisk/lock.h:478
        res = 132
        lt = (struct ast_lock_track *) 0x4e4f49ec
        canlog = 461
        bt = (struct ast_bt *) 0x81c5ba9
        __PRETTY_FUNCTION__ = "__ast_pthread_mutex_lock"
#1  0x080a7326 in __ast_channel_lock (chan=0x4e4f4954, filename=0x81b5d94 "channel.c", lineno=968, func=0x81b7373 "__ast_queue_frame") at channel.c:5134
        res = -1213441188
        __PRETTY_FUNCTION__ = "__ast_channel_lock"
#2  0x0809954a in __ast_queue_frame (chan=0x4e4f4954, fin=0xb5f570a0, head=0) at channel.c:968
        f = (struct ast_frame *) 0x84e1ed8
        cur = (struct ast_frame *) 0x0
        blah = 1
        qlen = 0
        __PRETTY_FUNCTION__ = "__ast_queue_frame"
#3  0x080998b3 in ast_queue_frame (chan=0x4e4f4954, fin=0xb5f570a0) at channel.c:1019
No locals.
#4  0x08099ab2 in ast_queue_control (chan=0x4e4f4954, control=AST_CONTROL_ANSWER) at channel.c:1066
        f = {frametype = AST_FRAME_CONTROL, subclass = 4, datalen = 0, samples = 0, mallocd = 0, mallocd_hdr_len = 0, offset = 0, src = 0x0, data = {ptr = 0x0, uint32 = 0,
    pad = "\000\000\000\000\000\000\000"}, delivery = {tv_sec = 0, tv_usec = 0}, frame_list = {next = 0x0}, flags = 0, ts = 0, len = 0, seqno = 0}
#5  0xb775a774 in handle_stimulus_message (req=0x857eeb8, s=0x8618a60) at chan_skinny.c:4690
        d = (struct skinny_device *) 0x840b748
        l = (struct skinny_line *) 0x84061e0
        sub = (struct skinny_subchannel *) 0x8503550
        c = (struct ast_channel *) 0xb5f57238
        t = 3052761640
        event = 9
        instance = 1
        callreference = 0
        __PRETTY_FUNCTION__ = "handle_stimulus_message"
        __FUNCTION__ = "handle_stimulus_message"
#6  0xb775f3d9 in handle_message (req=0x857eeb8, s=0x8618a60) at chan_skinny.c:5825
        res = 0
        __PRETTY_FUNCTION__ = "handle_message"
#7  0xb7760a73 in skinny_session (data=0x8618a60) at chan_skinny.c:6058
        res = 20
        req = (struct skinny_req *) 0x857eeb8
        s = (struct skinnysession *) 0x8618a60
        __PRETTY_FUNCTION__ = "skinny_session"
#8  0x0817741d in dummy_start (data=0x83d9250) at utils.c:962
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {-1213390860, 0, 4001536, -1242205256, -929731057, 211151220}, __mask_was_saved = 0}}, __pad = {0xb5f57480, 0x0, 0x0, 0x0}}
        __cancel_routine = (void (*)(void *)) 0x80762de <ast_unregister_thread>
        __cancel_arg = (void *) 0xb5f57b90
        not_first_call = 0
        ret = (void *) 0x0
        a = {start_routine = 0xb7760982 <skinny_session>, data = 0x8618a60, name = 0x8561e68 "skinny_session       started at [ 6105] chan_skinny.c accept_thread()"}
        lock_info = (struct thr_lock_info *) 0x8601f68
        mutex_attr = {__size = "\001\000\000", __align = 1}
        __PRETTY_FUNCTION__ = "dummy_start"
#9  0xb7ac3315 in start_thread () from /lib/i686/libpthread.so.0
No symbol table info available.
#10 0xb7d3ddde in clone () from /lib/i686/libc.so.6
No symbol table info available.