(gdb) bt
#0  0x001c2612 in rdb_add_index () from /usr/lib/asterisk/modules/res_srtp.so
#1  0x001bc7a1 in srtp_unprotect_rtcp () from /usr/lib/asterisk/modules/res_srtp.so
#2  0x001bb199 in ast_srtp_unprotect (srtp=0xb720a5c8, buf=0xb73488c8, len=0xb7350954, rtcp=1)
    at res_srtp.c:328
#3  0x0087955a in __rtp_recvfrom (instance=0xd12da08) at res_rtp_asterisk.c:328
#4  rtcp_recvfrom (instance=0xd12da08) at res_rtp_asterisk.c:337
#5  ast_rtcp_read (instance=0xd12da08) at res_rtp_asterisk.c:1637
#6  0x0087c4af in ast_rtp_read (instance=0xd12da08, rtcp=1) at res_rtp_asterisk.c:1975
#7  0x042014c5 in sip_rtp_read (ast=0xb7200650) at chan_sip.c:6839
#8  sip_read (ast=0xb7200650) at chan_sip.c:6920
#9  0x080bb5b3 in __ast_read (chan=0xb7200650, dropaudio=0) at channel.c:3742
#10 0x080bd5ce in ast_read (c0=0xb79f9f98, c1=0xb7200650, config=0xb7352064, fo=0xb73515a8, rc=0xb73515a4)
    at channel.c:4083
#11 ast_generic_bridge (c0=0xb79f9f98, c1=0xb7200650, config=0xb7352064, fo=0xb73515a8, rc=0xb73515a4)
    at channel.c:6463
#12 0x080be35a in ast_channel_bridge (c0=0xb79f9f98, c1=0xb7200650, config=0xb7352064, fo=0xb73515a8,
    rc=0xb73515a4) at channel.c:6895
#13 0x080ed277 in ast_bridge_call (chan=0xb79f9f98, peer=0xb7200650, config=0xb7352064) at features.c:3187
#14 0x00cf0ba1 in dial_exec_full (chan=0xb79f9f98, data=<value optimized out>, peerflags=0xb73521a0,
    continue_exec=0x0) at app_dial.c:2633
#15 0x00cf3199 in dial_exec (chan=0xb79f9f98, data=0xb7354254 "LOCAL/41325200026,120,TwW")
    at app_dial.c:2733
#16 0x08137fab in pbx_exec (c=0xb79f9f98, app=0xd099018, data=0xb7354254 "LOCAL/41325200026,120,TwW")
    at pbx.c:1399
#17 0x0814467a in pbx_extension_helper (c=0xb79f9f98, con=0x0, context=0xb79fa300 "macro-godial",
    exten=0xb79fa350 "s", priority=14, label=0x0, callerid=0xb79d3cd8 "0041325119692", action=E_SPAWN,
    found=0xb7356e30, combined_find_spawn=1) at pbx.c:4074
#18 0x0020e5d2 in _macro_exec (chan=0xb79f9f98, data=0x0, exclusive=0) at app_macro.c:408
#19 0x08137fab in pbx_exec (c=0xb79f9f98, app=0xd0f5d50,
    data=0xb7358f04 "godial,0041325200026,172.19.81.118:2118,0") at pbx.c:1399
#20 0x0814467a in pbx_extension_helper (c=0xb79f9f98, con=0x0, context=0xb79fa300 "macro-godial",
    exten=0xb79fa350 "s", priority=6, label=0x0, callerid=0xb79d3cd8 "0041325119692", action=E_SPAWN,
---Type <return> to continue, or q <return> to quit---
    found=0xb735b328, combined_find_spawn=1) at pbx.c:4074
#21 0x08148f46 in ast_spawn_extension (c=0xb79f9f98, args=0x0) at pbx.c:4566
#22 __ast_pbx_run (c=0xb79f9f98, args=0x0) at pbx.c:4664
#23 0x0814acf0 in pbx_thread (data=0xb79f9f98) at pbx.c:4975
#24 0x0818abdb in dummy_start (data=0xb79fd178) at utils.c:971
#25 0x00190832 in start_thread () from /lib/libpthread.so.0
#26 0x00480e0e in clone () from /lib/libc.so.6