(gdb) bt
#0  0x08074fa8 in __ast_fdleak_socket (domain=2, type=2, protocol=0, file=0x8143414 "acl.c", line=539, func=0x81437b1 "ast_ouraddrfor") at astfd.c:141
#1  0x0805ad2a in ast_ouraddrfor (them=0xb5ddf11c, us=0xb5ddf164) at acl.c:539
#2  0xb6d2dcf5 in ast_sip_ouraddrfor (them=0xb5ddf11c, us=0xb5ddf164) at chan_sip.c:1845
#3  0xb6d799be in sip_poke_peer (peer=0x8423bc8) at chan_sip.c:16867
#4  0xb6d4d994 in sip_poke_peer_s (data=0x8423bc8) at chan_sip.c:8236
#5  0x0811089f in ast_sched_runq (con=0x8210500) at sched.c:363
#6  0xb6d785ee in do_monitor (data=0x0) at chan_sip.c:16727
#7  0x081218ae in dummy_start (data=0x82017b0) at utils.c:856
#8  0xb7f8a39b in start_thread () from /lib/libpthread.so.0
#9  0xb73ef6de in clone () from /lib/libc.so.6
(gdb) f 0
#0  0x08074fa8 in __ast_fdleak_socket (domain=2, type=2, protocol=0, file=0x8143414 "acl.c", line=539, func=0x81437b1 "ast_ouraddrfor") at astfd.c:141
141             sproto = pe->p_name;
(gdb) list
136             if (res < 0 || res > 1023) {
137                     return res;
138             }
139
140             pe = getprotobynumber(protocol);
141             sproto = pe->p_name;
142
143             if (domain == PF_UNIX) {
144                     ast_copy_string(sdomain, "PF_UNIX", sizeof(sdomain));
145             } else if (domain == PF_INET) {
(gdb) p pe
$1 = (struct protoent *) 0x0