#0  0x00007fa2d70a07a4 in _int_free () from /lib64/libc.so.6
#1  0x00007fa2d1ebb136 in _talloc_free_internal (ptr=0x7fa298006460, location=0x7fa2cb7a5a18 "../lib/tevent/tevent_timed.c:351") at ../lib/talloc/talloc.c:962
#2  0x00007fa2d1ebc432 in _talloc_free (ptr=0x7fa298006460, location=0x7fa2cb7a5a18 "../lib/tevent/tevent_timed.c:351") at ../lib/talloc/talloc.c:1489
#3  0x00007fa2cb7a2902 in tevent_common_loop_timer_delay (ev=0x7fa2cc157090) at ../lib/tevent/tevent_timed.c:351
#4  0x00007fa2cb7a4bdd in epoll_event_loop_once (ev=0x7fa2cc157090, location=0x7fa2d24495c0 "../lib/ldb/common/ldb.c:626") at ../lib/tevent/tevent_epoll.c:916
#5  0x00007fa2cb7a197f in std_event_loop_once (ev=0x7fa2cc157090, location=0x7fa2d24495c0 "../lib/ldb/common/ldb.c:626") at ../lib/tevent/tevent_standard.c:112
#6  0x00007fa2cb79bfa9 in _tevent_loop_once (ev=0x7fa2cc157090, location=0x7fa2d24495c0 "../lib/ldb/common/ldb.c:626") at ../lib/tevent/tevent.c:530
#7  0x00007fa2d243fb63 in ldb_wait (handle=0x7fa298033ef0, type=LDB_WAIT_ALL) at ../lib/ldb/common/ldb.c:626
#8  0x00007fa2d24421a6 in ldb_search (ldb=0x7fa2cc168f40, mem_ctx=0x7fa298032d30, result=0x7fa2d5a84850, base=0x7fa29806e060, scope=LDB_SCOPE_BASE, attrs=0x7fa2d5a84860, exp_fmt=0x7fa2d2ef7a6e "objectClass=dnsZone")
    at ../lib/ldb/common/ldb.c:1577
#9  0x00007fa2d2ef438b in b9_find_zone_dn (state=0x7fa2cc155a60, zone_name=0x7fa2d5a849a0 "w764virtmatte.domain.com", mem_ctx=0x0, zone_dn=0x0) at ../source4/dns_server/dlz_bind9.c:730
#10 0x00007fa2d2ef459d in dlz_findzonedb (dbdata=0x7fa2cc155a60, name=0x7fa2d5a849a0 "w764virtmatte.domain.com") at ../source4/dns_server/dlz_bind9.c:791
#11 0x00007fa2d9999205 in dlopen_dlz_findzonedb (driverarg=0x0, dbdata=0x7fa2d30fe010, name=0x7fa2d5a849a0 "w764virtmatte.domain.com") at dlz_dlopen_driver.c:172
#12 0x00007fa2d920a9a8 in dns_sdlzfindzone (driverarg=0x7fa2d98cb1f0, dbdata=0x7fa2d30fe010, mctx=0x7fa2db2e92d0, rdclass=1, name=0x7fa2d5a84e20, dbp=0x7fa2d5a85090) at sdlz.c:1635
#13 0x00007fa2d911056b in dns_dlzfindzone (view=0x7fa2cc046ed0, name=0x7fa29cb7a100, minlabels=6, dbp=0x7fa2d5a85090) at dlz.c:302
#14 0x00007fa2d9946d2d in query_getdb (client=0x7fa29806b280, name=0x7fa29cb7a100, qtype=1, options=0, zonep=0x7fa2d5a85318, dbp=0x7fa2d5a853a0, versionp=0x7fa2d5a85328, is_zonep=0x7fa2d5a85400) at query.c:1036
#15 0x00007fa2d9952e7d in query_find (client=0x7fa29806b280, event=0x0, qtype=1) at query.c:5383
#16 0x00007fa2d9957e63 in ns_query_start (client=0x7fa29806b280) at query.c:7350
#17 0x00007fa2d9934d41 in client_request (task=0x7fa29e505bc0, event=0x7fa29cb77148) at client.c:1961
#18 0x00007fa2d821daa4 in dispatch (manager=0x7fa2d98cf010) at task.c:1012
#19 0x00007fa2d821dd48 in run (uap=0x7fa2d98cf010) at task.c:1157
#20 0x00007fa2d7bbf9d1 in start_thread () from /lib64/libpthread.so.0
#21 0x00007fa2d7110b5d in clone () from /lib64/libc.so.6