(gdb) bt full
#0  0x00007f7b43e6fc94 in memcpy () from /lib/libc.so.6
No symbol table info available.
#1  0x00000000004cfcd2 in ast_frdup (f=0x11368b8) at frame.c:528
        out = 0x7f7afb3a3010
        len = 549831982
        srclen = 5
        buf = 0x7f7afb3a3010
        frames = 0x10cbb50
        __PRETTY_FUNCTION__ = "ast_frdup"
#2  0x000000000046bf4b in __ast_queue_frame (chan=0x109f878, fin=0x1136660, head=0, after=0x0) at channel.c:1449
        f = 0x11111b0
        cur = 0x11368b8
        new_frames = 5
        new_voice_frames = 0
        queued_frames = 0
        queued_voice_frames = 0
        frames = {first = 0x10d0390, last = 0x11111b0}
        __PRETTY_FUNCTION__ = "__ast_queue_frame"
#3  0x000000000046c597 in ast_queue_frame (chan=0x109f878, fin=0x1136660) at channel.c:1521
No locals.
#4  0x0000000000472dfb in __ast_read (chan=0x109f878, dropaudio=0) at channel.c:3934
        readq_tail = 0x0
        read_action_payload = 0x62f4
        connected = {id = {name = {str = 0xc5c0000001e <Address 0xc5c0000001e out of bounds>, char_set = 549832448, presentation = 32635, valid = 0 '\000'},
              str = 0x7fffb4d7e8fd "H\213K\bH\272\317\367S?\304 H\211\310H\301\371?H\367\352H\301\372\aH)\312H\211S\b1\300H\205\355u\030H\203\304\b[]\303f\2
            subaddress = {str = 0x7f7b20c5c720 "P\311\305 {\177", type = 1139285338, odd_even_indicator = 123 '{', valid = 127 '\177'}, tag = 0xc5c20c5c950 <
              str = 0x562cd4 "H\213E\340H\211E\360H\213E\350H\211E\370H\213E\360H\213U\370\311\303UH\211\345H\211}\330H\211u\320H\213E\330H\211E\340H\213E\32H\211\345H\203\354\060\211}\354\211u\350\213E", <incomplete sequence \354\272>, char_set = 5892596, presentation = 0, valid = 72 'H'}, number = {str = 0x62f4
              valid = 89 'Y'}, subaddress = {str = 0x4f912348 <Address 0x4f912348 out of bounds>, type = 549833040, odd_even_indicator = 123 '{', valid = 127
            tag = 0x4717b8 "D\211\342)\302\211?\302H\213E\020\211\020H\213E\020\213"}, ani2 = 0, source = 0}
        f = 0x11365e8
        blah = 32635
        prestate = 6
        cause = 0
        __PRETTY_FUNCTION__ = "__ast_read"
#5  0x00000000004749b3 in ast_read (chan=0x109f878) at channel.c:4257
No locals.
#6  0x00007f7b40d91e80 in generic_fax_exec (chan=0x109f878, details=0x10bd198, reserved=0x10143f8, token=0x0) at res_fax.c:1251
        ready_chan = 0x109f878
        ofd = -99999
        exception = 0
        ms = 987
        timeout = 10000
        res = 0
        chancount = 1
        expected_frametype = 11
        expected_framesubclass = {integer = 1, codec = 1}
        t38negotiated = 1
        t38_parameters = {request_response = 549833496, version = 983, max_ifp = 1088026932, rate = 32635, rate_management = AST_T38_RATE_MANAGEMENT_TRANSFER
        tempvar = 0x0
        fax = 0x10143f8
        frame = 0x805ea0
        c = 0x109f878
        orig_write_format = 0
        orig_read_format = 0
        __PRETTY_FUNCTION__ = "generic_fax_exec"
#7  0x00007f7b40d98787 in receivefax_exec (chan=0x109f878, data=0x7f7b20c5f570 "/var/spool/asterisk/rxfax/fax-4930050099_1334911772.5676.tif") at res_fax.c:1
        parse = 0x7f7b20c5ce00 "/var/spool/asterisk/rxfax/fax-4930050099_1334911772.5676.tif"
        modems = '\000' <repeats 127 times>
        channel_alive = 0
        details = 0x10bd198
        s = 0x10143f8
        token = 0x0
        doc = 0x1014350
        args = {argc = 1, argv = 0x7f7b20c5cfd8, filename = 0x7f7b20c5ce00 "/var/spool/asterisk/rxfax/fax-4930050099_1334911772.5676.tif", options = 0x0}
        opts = {flags = 0}
        info = {
          context = "\300\321\305 {\177\000\000\017nN\000\000\000\000\000\331\004\000\000\060\000\000\000\356|[\000\000\000\000\000\035#\221O\000\000\000\000000\000\000\000\000\a\000\000\000\216\020\000",
          exten = "\324\315[\000\000\000\000\000\362t\345C\005\000\000\000\062\060\061\062-04-20 10:49:33\000\000\000\000\000\210\245\016\001\000\000\000\000\000\000\000\000\210\245\016\001\000\000\000",
          cid = "\207\246\016\001", '\000' <repeats 12 times>, "(\000\000\000\060\000\000\000 \321\305 {\177\000\000P\320\305 {\177\000\000\260\317\305 {\177\177\000\000\263+N\000\000\000\000\000\377\000\000\000\000\000\000\000 \370\t\001\000\000\000\000\205\350Y\000\000\000\000\000\060\351Y\000\000\000\000\000\0
        __PRETTY_FUNCTION__ = "receivefax_exec"
#8  0x0000000000500e83 in pbx_exec (c=0x109f878, app=0x7f7b3c09d2f0, data=0x7f7b20c5f570 "/var/spool/asterisk/rxfax/fax-4930050099_1334911772.5676.tif") at p
        res = 32635
        u = 0x10ea550
        saved_c_appl = 0x0
        saved_c_data = 0x0
        __PRETTY_FUNCTION__ = "pbx_exec"
#9  0x000000000050ada1 in pbx_extension_helper (c=0x109f878, con=0x0, context=0x109fdd0 "faxreceiver", exten=0x109fe20 "7504930050099", priority=4, label=0x0
    combined_find_spawn=1) at pbx.c:4249
        e = 0x1124580
        app = 0x7f7b3c09d2f0
        res = 17971920
        q = {incstack = {0x0 <repeats 128 times>}, stacklen = 0, status = 5, swo = 0x0, data = 0x0, foundcontext = 0x109fdd0 "faxreceiver"}
        passdata = "/var/spool/asterisk/rxfax/fax-4930050099_1334911772.5676.tif\000\177\000\000\000\000\000\000\000\000\000\000?\243;{\177\000\000\300\375\31\002\000\000\000@\367\305 {\177\000\000\000\000\000\000\000\000\000\000\066\000\000\000\000\000\000\000\060\001\000\000\000\000\000\000\230\336\024D{\177\00000\a\000\000\000\023\000\000\000?;{\177\000\000P\001\000\000\000\000\000\000\210\315\004<\023", '\000' <repeats 11 times>"\270, \354\f\001\000\000\000\000@
        matching_action = 0
        __PRETTY_FUNCTION__ = "pbx_extension_helper"
#10 0x000000000050c9d7 in ast_spawn_extension (c=0x109f878, context=0x109fdd0 "faxreceiver", exten=0x109fe20 "7504930050099", priority=4, callerid=0x1015970
No locals.
#11 0x000000000050d46a in __ast_pbx_run (c=0x109f878, args=0x0) at pbx.c:4987
        digit = 0
        invalid = 0
        timeout = 0
        dst_exten = '\000' <repeats 96 times>"\370, \377\377\377\377\377\377\377\001", '\000' <repeats 31 times>, "\020\001\000\000\000\000\000\000\a", '\000\000\000\000\000\000\000\370\377\377\377\377\377\377\377\001\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000\033\377\001", '\000' <repeats 14 timp-\306 {\177\000"
        pos = 0
        found = 1
        res = 0
        autoloopflag = 0
        error = 0
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#12 0x000000000050f172 in pbx_thread (data=0x109f878) at pbx.c:5327
        c = 0x109f878
#13 0x00000000005644cf in dummy_start (data=0x10bc020) at utils.c:1004
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, -1503094604365523315, 140166828705680, 140166807561984, 17795120, 7, -1503094604357134707
            0x7f7b43896280, 0x0}}
        __cancel_routine = 0x43a845 <ast_unregister_thread>
        __cancel_arg = 0x7f7b20c62700
        not_first_call = 0
        ret = 0x7f7b44148868
        a = {start_routine = 0x50f14d <pbx_thread>, data = 0x109f878, name = 0x10a0050 "pbx_thread", ' ' <repeats 11 times>, "started at [ 5353] pbx.c ast_pb
#14 0x00007f7b436858ca in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#15 0x00007f7b43ebf86d in clone () from /lib/libc.so.6
No symbol table info available.
#16 0x0000000000000000 in ?? ()
No symbol table info available.