#0  0x0066ed34 in pthread_mutex_lock () from /lib/tls/libpthread.so.0
(gdb) bt full
#0  0x0066ed34 in pthread_mutex_lock () from /lib/tls/libpthread.so.0
No symbol table info available.
#1  0x080c23a4 in ast_mutex_lock (pmutex=0x200041ae) at /usr/src/asterisk_1.4_vanilla/include/asterisk/lock.h:532
No locals.
#2  0x080c2fea in ast_rtp_lookup_code (rtp=0x2000203a, isAstFormat=1, code=256) at rtp.c:1668
	pt = 0
#3  0x080c1525 in bridge_p2p_rtp_write (rtp=0x9ef92d0, bridged=0x2000203a, rtpheader=0x9ef9354, len=32, hdrlen=12) at rtp.c:1038
	res = 0
	payload = 18
	bridged_payload = 0
	version = 2
	padding = 0
	mark = 8388608
	ext = 0
	rtpPT = {isAstFormat = 1, code = 256}
	seqno = 42707
	__PRETTY_FUNCTION__ = "bridge_p2p_rtp_write"
#4  0x080c7b3d in p2p_rtp_callback (id=0x9f0c058, fd=42, events=1, cbdata=0x9ef92d0) at rtp.c:2912
	res = 32
	hdrlen = 12
	sin = {sin_family = 2, sin_port = 21637, sin_addr = {s_addr = 1536801048}, sin_zero = "\000\000\000\000\000\000\000"}
	len = 16
	header = (unsigned int *) 0x9ef9354
	rtp = (struct ast_rtp *) 0x9ef92d0
	bridged = (struct ast_rtp *) 0x2000203a
	__PRETTY_FUNCTION__ = "p2p_rtp_callback"
#5  0x080a1473 in ast_io_wait (ioc=0x9eab2b8, howlong=613) at io.c:279
	res = 3
	x = 2
	origcnt = 17
#6  0x0044704b in do_monitor (data=0x0) at chan_sip.c:14865
	res = 613
	sip = (struct sip_pvt *) 0x0
	peer = (struct sip_peer *) 0x0
	t = 1167931379
	fastrestart = 0
	lastpeernum = -1
	curpeernum = 8
	reloading = 0
	__PRETTY_FUNCTION__ = "do_monitor"
#7  0x080ec141 in dummy_start (data=0x9ead328) at utils.c:545
	_buffer = {__routine = 0x8067ec5 <ast_unregister_thread>, __arg = 0x98cbb0, __canceltype = 0, __prev = 0x0}
	ret = (void *) 0x0
	a = {start_routine = 0x446ae0 <do_monitor>, data = 0x0, 
  name = 0x9ead338 "do_monitor", ' ' <repeats 11 times>, "started at [14924] chan_sip.c restart_monitor()"}
#8  0x0066d371 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#9  0x00558ffe in clone () from /lib/tls/libc.so.6
No symbol table info available.
(gdb) quit