(gdb) bt full
#0  0x00007f11bf84aa4b in memcpy () from /lib/libc.so.6
No symbol table info available.
#1  0x00000000004d00ea in ast_frdup (f=0x2328428) at frame.c:528
        out = 0x7f1191dd4010
        len = 35831414
        srclen = 5
        buf = 0x7f1191dd4010
        frames = 0x1f82460
        __PRETTY_FUNCTION__ = "ast_frdup"
#2  0x000000000046bfcf in __ast_queue_frame (chan=0x7f11b44f91f8, fin=0x23283b0, head=0, after=0x0) at channel.c:1449
        f = 0x22622c0
        cur = 0x2328428
        new_frames = 1
        new_voice_frames = 0
        queued_frames = 0
        queued_voice_frames = 0
        frames = {first = 0x22622c0, last = 0x22622c0}
        __PRETTY_FUNCTION__ = "__ast_queue_frame"
#3  0x000000000046c61b in ast_queue_frame (chan=0x7f11b44f91f8, fin=0x23283b0) at channel.c:1521
No locals.
#4  0x0000000000472eb6 in __ast_read (chan=0x7f11b44f91f8, dropaudio=0) at channel.c:3949
        readq_tail = 0x0
        read_action_payload = 0xc1dd2
        connected = {id = {name = {str = 0xc5f997eb950 <Address 0xc5f997eb950 out of bounds>, char_set = -1719748864, presentation = 32529, valid = 0 '\000'}, number = {
              str = 0x7fff2231a8fd "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\220\270`", plan = -1719748832,
              presentation = 32529, valid = 248 '\370'}, subaddress = {str = 0x7f11997eb720 "P\271~\231\021\177", type = -1081750182, odd_even_indicator = 17 '\021', valid = 127 '\177'},
            tag = 0xc5f997eb950 <Address 0xc5f997eb950 out of bounds>}, ani = {name = {
              str = 0x563474 "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\320H\211E\350H\213E\340H\211E\360H\213E\350H\211E\370H\213E\360H\213U\370\311\303UH\211\345H\203\354\060\211}\354\211u\350\213E", <incomplete sequence \354\272>, char_set = 5894900, presentation = 0, valid = 74 'J'}, number = {
              str = 0xc1dd2 <Address 0xc1dd2 out of bounds>, plan = 1336561226, presentation = 0, valid = 80 'P'}, subaddress = {str = 0x4faa4e4a <Address 0x4faa4e4a out of bounds>, type = -1719748272,
              odd_even_indicator = 17 '\021', valid = 127 '\177'}, tag = 0x471849 "D\211\342)\302\211?\302H\213E\020\211\020H\213E\020\213"}, ani2 = 0, source = 0}
        f = 0x2328338
        blah = 32529
        prestate = 6
        cause = 0
        __PRETTY_FUNCTION__ = "__ast_read"
#5  0x0000000000474ab9 in ast_read (chan=0x7f11b44f91f8) at channel.c:4274
No locals.
#6  0x00007f11bbce7e80 in generic_fax_exec (chan=0x7f11b44f91f8, details=0x3266098, reserved=0x223bee8, token=0x0) at res_fax.c:1251
        ready_chan = 0x7f11b44f91f8
        ofd = -99999
        exception = 0
        ms = 985
        timeout = 10000
        res = 0
        chancount = 1
        expected_frametype = 11
        expected_framesubclass = {integer = 1, codec = 1}
        t38negotiated = 1
        t38_parameters = {request_response = 2575219480, version = 983, max_ifp = 3150928244, rate = 32529, rate_management = AST_T38_RATE_MANAGEMENT_TRANSFERRED_TCF, fill_bit_removal = 0,
          transcoding_mmr = 0, transcoding_jbig = 0}
        tempvar = 0x0
        fax = 0x223bee8
        frame = 0x806ee0
        c = 0x7f11b44f91f8
        orig_write_format = 0
        orig_read_format = 0
        __PRETTY_FUNCTION__ = "generic_fax_exec"
#7  0x00007f11bbcee7a8 in receivefax_exec (chan=0x7f11b44f91f8, data=0x7f11997ee570 "/var/spool/asterisk/rxfax/fax-4930055379_1336561098.86585.tif") at res_fax.c:1761
        parse = 0x7f11997ebe00 "/var/spool/asterisk/rxfax/fax-4930055379_1336561098.86585.tif"
        modems = '\000' <repeats 127 times>
        channel_alive = 32529
        details = 0x3266098
        s = 0x223bee8
        token = 0x0
        doc = 0x225e2f0
        args = {argc = 1, argv = 0x7f11997ebfd8, filename = 0x7f11997ebe00 "/var/spool/asterisk/rxfax/fax-4930055379_1336561098.86585.tif", options = 0x0}
        opts = {flags = 0}
        info = {context = "\000\000\000\000\000\000\000\000\037\017Y", '\000' <repeats 68 times>, exten = '\000' <repeats 79 times>,
          cid = '\000' <repeats 48 times>, " \375\201\277\021\177\000\000\200\300~\231\021\177\000\000\000\000\000\000\000\000\000\000\063\060N", '\000' <repeats 13 times>"\240, \221O\264\021\177\000\000\205\361Y\000\000\000\000\000\060\362Y\000\000\000\000\000\030\000\000\000\354\001\000\000\024\354Y\000\000\000\000"}
        __PRETTY_FUNCTION__ = "receivefax_exec"
#8  0x00000000005015db in pbx_exec (c=0x7f11b44f91f8, app=0x7f11b4005950, data=0x7f11997ee570 "/var/spool/asterisk/rxfax/fax-4930055379_1336561098.86585.tif") at pbx.c:1430
        res = 32529
        u = 0x22e0520
        saved_c_appl = 0x0
        saved_c_data = 0x0
        __PRETTY_FUNCTION__ = "pbx_exec"
#9  0x000000000050b4f9 in pbx_extension_helper (c=0x7f11b44f91f8, con=0x0, context=0x7f11b44f9750 "faxreceiver", exten=0x7f11b44f97a0 "7504930055379", priority=4, label=0x0,
    callerid=0x7f11b4059410 "Anonymous", action=E_SPAWN, found=0x7f11997f0c60, combined_find_spawn=1) at pbx.c:4249
        e = 0x2252500
        app = 0x7f11b4005950
        res = -1269848448
        q = {incstack = {0x0 <repeats 128 times>}, stacklen = 0, status = 5, swo = 0x0, data = 0x0, foundcontext = 0x7f11b44f9750 "faxreceiver"}
        passdata = "/var/spool/asterisk/rxfax/fax-4930055379_1336561098.86585.tif\000\000\000Z\000\000\000\000\000\000\000\000\356~\231\021\177\000\000\t\350?\021\177\000\000\266C\206\277\021\177\000\000\002", '\000' <repeats 11 times>, "\021\177\000\000\265\346~\231\021\177\000\000\000\000\000\000\021\177\000\000s\000\000\000\060\000\000\060\002\000\000\000\000\000\000\000@\351~\231\021\177\000\000\000\000\000\000\n\000\000\000\266\346~\231\021\177\000\000\000\000\000\000\021\177\000\000\030\000\000\000\060\000\000\000\200\351~\231\021\177\000\000\300\350~\231\021\177\000\000?\350~\231\021\177\000\000\000\000\000\000\000\000\000\000`\346~\231\021\177\000\000@\347~\231"...
        matching_action = 0
        __PRETTY_FUNCTION__ = "pbx_extension_helper"
#10 0x000000000050d12f in ast_spawn_extension (c=0x7f11b44f91f8, context=0x7f11b44f9750 "faxreceiver", exten=0x7f11b44f97a0 "7504930055379", priority=4, callerid=0x7f11b4059410 "Anonymous",
    found=0x7f11997f0c60, combined_find_spawn=1) at pbx.c:4887
No locals.
#11 0x000000000050dbc2 in __ast_pbx_run (c=0x7f11b44f91f8, args=0x0) at pbx.c:4987
        digit = 0
        invalid = 0
        timeout = 0
        dst_exten = "\300\n\177\231\021\177", '\000' <repeats 14 times>, "x86_64", '\000' <repeats 14 times>"\260, \r\177\231\021\177\000\000&*\000\000\000\000\000\000@\022]", '\000' <repeats 26 times>, "(no\231?\021\177\000\000\000\000\000\000\000\000\000\000\262\313C\000\000\000\000\000\240\245\203\000\000\000\000\000\377\001\000\000\000\000\000\000\260\v\177\231\021\177\000\000\000\000\000\000(", '\000' <repeats 11 times>, "+\371\210\277\f\000\000\000\234\004\000\000\033\000\000\000\000\000\000\000\001\000\000\000\002\000\000\000n\000\000\000\071?\021\177\000\000\000\000\000\000\000\000\000\000U\317C\000\000\000\000\000\033\377\001\000\000\000\000\000\240\245\203\000\000\000\000\000\000\000\000\000\020\026\020@\000\000\000\000\020\026\020@(\000\000\000\001\000\001\000)\000\000\000"...
        pos = 0
        found = 1
        res = 0
        autoloopflag = 0
        error = 0
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#12 0x000000000050f8ca in pbx_thread (data=0x7f11b44f91f8) at pbx.c:5327
        c = 0x7f11b44f91f8
#13 0x0000000000564cdf in dummy_start (data=0x7f11b44eebd0) at utils.c:1004
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 8086962482745245905, 139713592559504, 139713566414592, 36311776, 7, 8086962482720080081, -8207357482968481583},
              __mask_was_saved = 0}}, __pad = {0x7f11997f0f80, 0x0, 0x7f11bf271280, 0x0}}
        __cancel_routine = 0x43a845 <ast_unregister_thread>
        __cancel_arg = 0x7f11997f1700
        not_first_call = 0
        ret = 0x7f11bfb23868
        a = {start_routine = 0x50f8a5 <pbx_thread>, data = 0x7f11b44f91f8, name = 0x7f11b4470830 "pbx_thread", ' ' <repeats 11 times>, "started at [ 5353] pbx.c ast_pbx_start()"}
#14 0x00007f11bf0608ca in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#15 0x00007f11bf89a86d in clone () from /lib/libc.so.6
No symbol table info available.
#16 0x0000000000000000 in ?? ()
No symbol table info available.