(gdb) bt
#0  0x4018703f in realloc () from /lib/libc.so.6
#1  0x4047c104 in initreqprep (req=0xbd1ea82c, p=0x81752b0, cmd=0x404990e4 "INVITE", vxml_url=0x0) at chan_sip.c:3763
#2  0x40472b1b in transmit_invite (p=0x81752b0, cmd=0x404990e4 "INVITE", sdp=1, auth=0x0, authheader=0x0, vxml_url=0x0, 
    distinctive_ring=0x0, osptoken=0x0, addsipheaders=0, init=1) at chan_sip.c:3829
#3  0x40485a67 in sip_call (ast=0x817a798, dest=0xbd1ec13c "41", timeout=0) at chan_sip.c:1438
#4  0x0805e049 in ast_call (chan=0x817a798, addr=0xbd1ec13c "41", timeout=0) at channel.c:2033
#5  0x4108d100 in dial_exec_full (chan=0x80fabc8, data=0x817a798, peerflags=0xbd1ec3c0) at app_dial.c:1001
#6  0x4108ac4e in dial_exec (chan=0x80fabc8, data=0xbd1f056c) at app_dial.c:1278
#7  0x0807d131 in pbx_extension_helper (c=0x80fabc8, con=0x0, context=0x80fad10 "macro-call", exten=0x80fae04 "s", 
    priority=1, label=0x0, callerid=0x4108ac30 "U\211%G�%@\203%G�%@\f\215U%G�%@\213E\fRP\213E\bP%G�%@E%G�%@", action=1091642992) at pbx.c:482
#8  0x0807bd84 in ast_spawn_extension (c=0x80fabc8, context=0x80fad10 "macro-call", exten=0x80fae04 "s", priority=1, 
    callerid=0x0) at pbx.c:1847
#9  0x412578eb in macro_exec (chan=0x80fabc8, data=0x80fad10) at app_macro.c:170
#10 0x0807d131 in pbx_extension_helper (c=0x80fabc8, con=0x0, context=0x80fad10 "macro-call", exten=0x80fae04 "s", 
    priority=9, label=0x0, callerid=0x3 <Address 0x3 out of bounds>, action=1092984128) at pbx.c:482
#11 0x0807bd84 in ast_spawn_extension (c=0x80fabc8, context=0x80fad10 "macro-call", exten=0x80fae04 "s", priority=9, 
    callerid=0x0) at pbx.c:1847
#12 0x412578eb in macro_exec (chan=0x80fabc8, data=0x80fad10) at app_macro.c:170
#13 0x0807d131 in pbx_extension_helper (c=0x80fabc8, con=0x0, context=0x80fad10 "macro-call", exten=0x80fae04 "s", 
    priority=3, label=0x0, callerid=0x3 <Address 0x3 out of bounds>, action=1092984128) at pbx.c:482
#14 0x08076166 in ast_pbx_run (c=0x80fabc8) at pbx.c:1847
#15 0x0807d72f in pbx_thread (data=0x80fabc8) at pbx.c:2092
#16 0x400236de in pthread_handle_free () from /lib/libpthread.so.0

(gdb) frame 1
#1  0x4047c104 in initreqprep (req=0xbd1ea82c, p=0x81752b0, cmd=0x404990e4 "INVITE", vxml_url=0x0) at chan_sip.c:3763
3763                    strncpy(p->fromuser, l, MAX(0,sizeof(p->fromuser) - 1));


(gdb) print *p
$2 = {lock = {__m_reserved = 0, __m_count = 0, __m_owner = 0x0, __m_kind = 1, __m_lock = {__status = 0, __spinlock = 0}}, 
  callid = "729bad2853f5887202771981518f43d4@10.10.10.77", '\0' <repeats 35 times>, randdata = '\0' <repeats 79 times>, 
  prefs = {order = "\002\003\004\023\024", '\0' <repeats 26 times>}, ocseq = 101, icseq = 0, callgroup = 0, 
  pickupgroup = 0, lastinvite = 0, flags = 1318912, capability = 786446, jointcapability = 786446, peercapability = 0, 
  prefcodec = 2, noncodeccapability = 1, callingpres = 1, authtries = 0, expiry = 0, branch = 324317742, 
  tag = 1210453292, sessionid = 0, sessionversion = 0, sa = {sin_family = 2, sin_port = 46854, sin_addr = {
      s_addr = 1896483338}, sin_zero = "\000\000\000\000\000\000\000"}, redirip = {sin_family = 0, sin_port = 0, 
    sin_addr = {s_addr = 0}, sin_zero = "\000\000\000\000\000\000\000"}, vredirip = {sin_family = 0, sin_port = 0, 
    sin_addr = {s_addr = 0}, sin_zero = "\000\000\000\000\000\000\000"}, redircodecs = 0, recv = {sin_family = 2, 
    sin_port = 46854, sin_addr = {s_addr = 1896483338}, sin_zero = "\000\000\000\000\000\000\000"}, ourip = {
    s_addr = 1292503562}, owner = 0x817a798, exten = '\0' <repeats 79 times>, refer_to = '\0' <repeats 79 times>, 
  referred_by = '\0' <repeats 79 times>, refer_contact = '\0' <repeats 79 times>, refer_call = 0x0, route = 0x0, 
  route_persistant = 0, from = '\0' <repeats 255 times>, useragent = '\0' <repeats 255 times>, 
  context = "voip-sip", '\0' <repeats 71 times>, fromdomain = '\0' <repeats 79 times>, 
  fromuser = '\0' <repeats 79 times>, fromname = '\0' <repeats 79 times>, 
  tohost = "10.10.10.113", '\0' <repeats 67 times>, language = '\0' <repeats 19 times>, 
  musicclass = "default", '\0' <repeats 12 times>, rdnis = '\0' <repeats 255 times>, theirtag = '\0' <repeats 255 times>, 
  username = "41", '\0' <repeats 253 times>, peername = "41", '\0' <repeats 253 times>, 
  authname = "41", '\0' <repeats 253 times>, uri = '\0' <repeats 255 times>, okcontacturi = '\0' <repeats 255 times>, 
  peersecret = '\0' <repeats 255 times>, peermd5secret = '\0' <repeats 255 times>, cid_num = '\0' <repeats 255 times>, 
  cid_name = '\0' <repeats 255 times>, 
  via = "SIP/2.0/UDP 10.10.10.77:5060;branch=z9hG4bK1354b22e;rport", '\0' <repeats 198 times>, 
  fullcontact = "sip:41@10.10.10.113:1719", '\0' <repeats 103 times>, accountcode = '\0' <repeats 19 times>, 
  our_contact = '\0' <repeats 255 times>, realm = '\0' <repeats 255 times>, nonce = '\0' <repeats 255 times>, 
  opaque = '\0' <repeats 255 times>, qop = '\0' <repeats 79 times>, domain = '\0' <repeats 255 times>, 
  lastmsg = "Init: INVITE", '\0' <repeats 243 times>, amaflags = 0, pendinginvite = 0, initreq = {rlPart1 = 0x0, 
    rlPart2 = 0x0, len = 0, headers = 0, header = {0x0 <repeats 64 times>}, lines = 0, line = {0x0 <repeats 64 times>}, 
    data = '\0' <repeats 4095 times>}, maxtime = 0, initid = -1, autokillid = -1, lastrtprx = 0, lastrtptx = 0, 
  rtptimeout = 60, rtpholdtimeout = 0, rtpkeepalive = 0, subscribed = 0, stateid = -1, dialogver = 0, vad = 0x0, 
  peerpoke = 0x0, registry = 0x0, rtp = 0x8177e80, vrtp = 0x0, packets = 0x0, history = 0x0, vars = 0x0, 
  next = 0x8150a30, onhold = 0}

(gdb) print *p->owner
$3 = {name = "SIP/41-5510", '\0' <repeats 68 times>, language = "fr", '\0' <repeats 17 times>, type = 0x40497c06 "SIP", 
  fds = {55, 56, -1, -1, -1, -1, 57, -1}, musicclass = "default", '\0' <repeats 12 times>, music_state = 0x0, 
  generatordata = 0x0, generator = 0x0, _bridge = 0x0, masq = 0x0, masqr = 0x0, cdrflags = 0, _softhangup = 0, 
  whentohangup = 0, blocker = 0, lock = {__m_reserved = 0, __m_count = 0, __m_owner = 0xbd1ffbe0, __m_kind = 1, 
    __m_lock = {__status = 1, __spinlock = 0}}, blockproc = 0x0, appl = 0x4108ee8a "AppDial", 
  data = 0x4108ee92 "(Outgoing Line)", fdno = 0, sched = 0x81750c0, streamid = -1, stream = 0x0, vstreamid = 0, 
  vstream = 0x0, oldwriteformat = 0, timingfd = 57, timingfunc = 0, timingdata = 0x0, _state = 0, rings = 0, 
  nativeformats = 2, readformat = 2, writeformat = 2, cid = {cid_dnid = 0x0, cid_num = 0x0, cid_name = 0x0, 
    cid_ani = 0x0, cid_rdnis = 0x0, cid_pres = 1, cid_ani2 = 0, cid_ton = 0, cid_tns = 0}, 
  context = "voip-sip", '\0' <repeats 71 times>, macrocontext = '\0' <repeats 79 times>, 
  macroexten = '\0' <repeats 79 times>, macropriority = 0, exten = '\0' <repeats 79 times>, priority = 1, 
  dtmfq = '\0' <repeats 79 times>, dtmff = {frametype = 0, subclass = 0, datalen = 0, samples = 0, mallocd = 0, 
    offset = 0, src = 0x0, data = 0x0, delivery = {tv_sec = 0, tv_usec = 0}, prev = 0x0, next = 0x0}, pvt = 0x817ab90, 
  pbx = 0x0, amaflags = 3, accountcode = '\0' <repeats 19 times>, cdr = 0x0, adsicpe = 0, 
  call_forward = '\0' <repeats 79 times>, zone = 0x0, monitor = 0x0, insmpl = 0, outsmpl = 0, fin = 0, fout = 0, 
  uniqueid = "1107774445.4", '\0' <repeats 19 times>, hangupcause = 0, varshead = {first = 0x817ac00, lock = {
      __m_reserved = 0, __m_count = 0, __m_owner = 0x0, __m_kind = 0, __m_lock = {__status = 0, __spinlock = 0}}}, 
  callgroup = 0, pickupgroup = 0, flags = 0, next = 0x81602a8}

(gdb) print p->owner->cid
$4 = {cid_dnid = 0x0, cid_num = 0x0, cid_name = 0x0, cid_ani = 0x0, cid_rdnis = 0x0, cid_pres = 1, cid_ani2 = 0, 
  cid_ton = 0, cid_tns = 0}