bind/backport-0023-Lock-zone-before-calling-zone_namerd_tostr.patch
jiangheng ad37c37958 backport some patches from community
(cherry picked from commit a9fd9ece9b9436b6103d084920c6897ef1adbae6)
2022-09-03 21:36:21 +08:00

70 lines
2.3 KiB
Diff

From b2bccc68a5d81ff543298ad7781202d97d31f9c4 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Tue, 10 Nov 2020 15:53:06 +1100
Subject: [PATCH] Lock zone before calling zone_namerd_tostr()
WARNING: ThreadSanitizer: data race
Read of size 8 at 0x000000000001 by thread T1:
#0 inline_raw lib/dns/zone.c:1375
#1 zone_namerd_tostr lib/dns/zone.c:15316
#2 dns_zone_name lib/dns/zone.c:15391
#3 xfrin_log lib/dns/xfrin.c:1605
#4 xfrin_destroy lib/dns/xfrin.c:1477
#5 dns_xfrin_detach lib/dns/xfrin.c:739
#6 xfrin_connect_done lib/dns/xfrin.c:970
#7 tcpdnsconnect_cb netmgr/tcpdns.c:786
#8 tcp_connect_cb netmgr/tcp.c:292
#9 <null> <null>
#10 <null> <null>
Previous write of size 8 at 0x000000000001 by thread T2 (mutexes: write M1):
#0 zone_shutdown lib/dns/zone.c:14462
#1 dispatch lib/isc/task.c:1152
#2 run lib/isc/task.c:1344
#3 <null> <null>
Location is heap block of size 2769 at 0x000000000013 allocated by thread T3:
#0 malloc <null>
#1 default_memalloc lib/isc/mem.c:713
#2 mem_get lib/isc/mem.c:622
#3 mem_allocateunlocked lib/isc/mem.c:1268
#4 isc___mem_allocate lib/isc/mem.c:1288
#5 isc__mem_allocate lib/isc/mem.c:2453
#6 isc___mem_get lib/isc/mem.c:1037
#7 isc__mem_get lib/isc/mem.c:2432
#8 dns_zone_create lib/dns/zone.c:984
#9 configure_zone bin/named/server.c:6502
#10 do_addzone bin/named/server.c:13391
#11 named_server_changezone bin/named/server.c:13788
#12 named_control_docommand bin/named/control.c:207
#13 control_command bin/named/controlconf.c:392
#14 dispatch lib/isc/task.c:1152
#15 run lib/isc/task.c:1344
#16 <null> <null>
(cherry picked from commit 84f43903da742a4d1040ad0dd7f1d1dca23ac31c)
Conflict: NA
Reference: https://gitlab.isc.org/isc-projects/bind9/-/commit/b2bccc68a5d81ff543298ad7781202d97d31f9c4
---
lib/dns/zone.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/lib/dns/zone.c b/lib/dns/zone.c
index 30b71bdb8c..d3d9f32bcc 100644
--- a/lib/dns/zone.c
+++ b/lib/dns/zone.c
@@ -14384,7 +14384,10 @@ void
dns_zone_name(dns_zone_t *zone, char *buf, size_t length) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(buf != NULL);
+
+ LOCK_ZONE(zone);
zone_namerd_tostr(zone, buf, length);
+ UNLOCK_ZONE(zone);
}
void
--
2.23.0