Include more Thread Sanitizer changes
Fix as much race conditions as possible.
This commit is contained in:
Petr Menšík
parent
23657868e6
commit
43f4de9bf3
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@ -0,0 +1,159 @@
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From 638561615c37e8eace986e268811335c12d1b6a1 Mon Sep 17 00:00:00 2001
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From: Mark Andrews <marka@isc.org>
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Date: Thu, 12 Dec 2019 20:41:44 +1100
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Subject: [PATCH] give zspill its own lock
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(cherry picked from commit a52189e8e67a20097539fe3e6f7da4e4c01dc340)
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---
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lib/dns/resolver.c | 45 +++++++++++++++++++++++++++++----------------
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1 file changed, 29 insertions(+), 16 deletions(-)
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diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
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index 9f65c0596a..04367f82c6 100644
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--- a/lib/dns/resolver.c
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+++ b/lib/dns/resolver.c
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@@ -460,20 +460,21 @@ struct dns_resolver {
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isc_mutex_t lock;
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isc_mutex_t nlock;
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isc_mutex_t primelock;
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+ isc_mutex_t zspill_lock;
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dns_rdataclass_t rdclass;
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isc_socketmgr_t * socketmgr;
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isc_timermgr_t * timermgr;
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isc_taskmgr_t * taskmgr;
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dns_view_t * view;
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- bool frozen;
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+ bool frozen;
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unsigned int options;
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dns_dispatchmgr_t * dispatchmgr;
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dns_dispatchset_t * dispatches4;
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- bool exclusivev4;
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+ bool exclusivev4;
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dns_dispatchset_t * dispatches6;
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isc_dscp_t querydscp4;
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isc_dscp_t querydscp6;
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- bool exclusivev6;
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+ bool exclusivev6;
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unsigned int nbuckets;
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fctxbucket_t * buckets;
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zonebucket_t * dbuckets;
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@@ -492,7 +493,7 @@ struct dns_resolver {
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unsigned int spillatmax;
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unsigned int spillatmin;
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isc_timer_t * spillattimer;
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- bool zero_no_soa_ttl;
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+ bool zero_no_soa_ttl;
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unsigned int query_timeout;
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unsigned int maxdepth;
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unsigned int maxqueries;
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@@ -502,14 +503,16 @@ struct dns_resolver {
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unsigned int retryinterval; /* in milliseconds */
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unsigned int nonbackofftries;
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+ /* Locked by lock. */
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+ unsigned int zspill; /* fetches-per-zone */
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+
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/* Locked by lock. */
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unsigned int references;
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- bool exiting;
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+ bool exiting;
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isc_eventlist_t whenshutdown;
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unsigned int activebuckets;
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- bool priming;
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+ bool priming;
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unsigned int spillat; /* clients-per-query */
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- unsigned int zspill; /* fetches-per-zone */
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dns_badcache_t * badcache; /* Bad cache. */
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@@ -1257,7 +1260,7 @@ fcount_incr(fetchctx_t *fctx, bool force) {
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isc_result_t result = ISC_R_SUCCESS;
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zonebucket_t *dbucket;
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fctxcount_t *counter;
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- unsigned int bucketnum, spill;
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+ unsigned int bucketnum;
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REQUIRE(fctx != NULL);
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REQUIRE(fctx->res != NULL);
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@@ -1266,10 +1269,6 @@ fcount_incr(fetchctx_t *fctx, bool force) {
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bucketnum = dns_name_fullhash(&fctx->domain, false)
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% RES_DOMAIN_BUCKETS;
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- LOCK(&fctx->res->lock);
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- spill = fctx->res->zspill;
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- UNLOCK(&fctx->res->lock);
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-
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dbucket = &fctx->res->dbuckets[bucketnum];
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LOCK(&dbucket->lock);
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@@ -1297,6 +1296,12 @@ fcount_incr(fetchctx_t *fctx, bool force) {
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ISC_LIST_APPEND(dbucket->list, counter, link);
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}
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} else {
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+ unsigned int spill;
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+
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+ LOCK(&fctx->res->zspill_lock);
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+ spill = fctx->res->zspill;
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+ UNLOCK(&fctx->res->zspill_lock);
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+
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if (!force && spill != 0 && counter->count >= spill) {
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counter->dropped++;
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fcount_logspill(fctx, counter);
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@@ -8811,6 +8816,7 @@ destroy(dns_resolver_t *res) {
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INSIST(res->nfctx == 0);
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+ DESTROYLOCK(&res->zspill_lock);
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DESTROYLOCK(&res->primelock);
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DESTROYLOCK(&res->nlock);
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DESTROYLOCK(&res->lock);
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@@ -9089,10 +9095,14 @@ dns_resolver_create(dns_view_t *view,
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if (result != ISC_R_SUCCESS)
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goto cleanup_nlock;
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+ result = isc_mutex_init(&res->zspill_lock);
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+ if (result != ISC_R_SUCCESS)
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+ goto cleanup_primelock;
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+
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task = NULL;
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result = isc_task_create(taskmgr, 0, &task);
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if (result != ISC_R_SUCCESS)
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- goto cleanup_primelock;
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+ goto cleanup_zspill_lock;
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isc_task_setname(task, "resolver_task", NULL);
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result = isc_timer_create(timermgr, isc_timertype_inactive, NULL, NULL,
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@@ -9100,7 +9110,7 @@ dns_resolver_create(dns_view_t *view,
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&res->spillattimer);
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isc_task_detach(&task);
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if (result != ISC_R_SUCCESS)
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- goto cleanup_primelock;
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+ goto cleanup_zspill_lock;
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#if USE_ALGLOCK
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result = isc_rwlock_init(&res->alglock, 0, 0);
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@@ -9133,6 +9143,9 @@ dns_resolver_create(dns_view_t *view,
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isc_timer_detach(&res->spillattimer);
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#endif
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+ cleanup_zspill_lock:
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+ DESTROYLOCK(&res->zspill_lock);
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+
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cleanup_primelock:
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DESTROYLOCK(&res->primelock);
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@@ -10275,9 +10288,9 @@ dns_resolver_setfetchesperzone(dns_resolver_t *resolver, uint32_t clients)
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{
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REQUIRE(VALID_RESOLVER(resolver));
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- LOCK(&resolver->lock);
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+ LOCK(&resolver->zspill_lock);
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resolver->zspill = clients;
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- UNLOCK(&resolver->lock);
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+ UNLOCK(&resolver->zspill_lock);
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}
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--
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2.21.0
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@ -0,0 +1,77 @@
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From 23a6775f62deeee63e9f7927be387fecf23a8074 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
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Date: Tue, 10 Dec 2019 10:02:09 +0100
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Subject: [PATCH] Ensure all zone_settimer() calls are done on locked zone
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(cherry picked from commit cf48e8eb326f824170f2069e5d5c33992b1783a4)
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(cherry picked from commit 3bac7e98074643ff62582545e5840e4195517b07)
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---
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lib/dns/zone.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/lib/dns/zone.c b/lib/dns/zone.c
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index e8cff77588..db837aae50 100644
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--- a/lib/dns/zone.c
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+++ b/lib/dns/zone.c
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@@ -10291,7 +10291,9 @@ zone_maintenance(dns_zone_t *zone) {
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default:
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break;
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}
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+ LOCK_ZONE(zone);
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zone_settimer(zone, &now);
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+ UNLOCK_ZONE(zone);
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}
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void
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@@ -13081,6 +13083,7 @@ zone_settimer(dns_zone_t *zone, isc_time_t *now) {
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isc_result_t result;
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REQUIRE(DNS_ZONE_VALID(zone));
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+ REQUIRE(LOCKED_ZONE(zone));
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ENTER;
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if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
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@@ -18405,6 +18408,7 @@ zone_rekey(dns_zone_t *zone) {
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UNLOCK_ZONE(zone);
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}
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+ LOCK_ZONE(zone);
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isc_time_settoepoch(&zone->refreshkeytime);
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/*
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@@ -18416,11 +18420,9 @@ zone_rekey(dns_zone_t *zone) {
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isc_time_t timethen;
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isc_stdtime_t then;
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- LOCK_ZONE(zone);
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DNS_ZONE_TIME_ADD(&timenow, zone->refreshkeyinterval,
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&timethen);
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zone->refreshkeytime = timethen;
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- UNLOCK_ZONE(zone);
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for (key = ISC_LIST_HEAD(dnskeys);
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key != NULL;
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@@ -18431,12 +18433,10 @@ zone_rekey(dns_zone_t *zone) {
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continue;
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DNS_ZONE_TIME_ADD(&timenow, then - now, &timethen);
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- LOCK_ZONE(zone);
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if (isc_time_compare(&timethen,
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&zone->refreshkeytime) < 0) {
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zone->refreshkeytime = timethen;
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}
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- UNLOCK_ZONE(zone);
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}
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zone_settimer(zone, &timenow);
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@@ -18444,6 +18444,7 @@ zone_rekey(dns_zone_t *zone) {
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isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80);
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dns_zone_log(zone, ISC_LOG_INFO, "next key event: %s", timebuf);
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}
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+ UNLOCK_ZONE(zone);
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done:
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dns_diff_clear(&diff);
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--
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2.21.0
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@ -0,0 +1,38 @@
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From 7e844b093b0442bdc5cdc5aefd56fdc05f9be88f Mon Sep 17 00:00:00 2001
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From: Mark Andrews <marka@isc.org>
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Date: Thu, 12 Dec 2019 19:17:39 +1100
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Subject: [PATCH] acquire task lock before calling push_readyq for task->flags
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access
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(cherry picked from commit 7c94d2cd7dfaa3f04cd86ad9ed97e8366a774a4c)
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---
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lib/isc/task.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/lib/isc/task.c b/lib/isc/task.c
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index 329604a465..f9c4354bd2 100644
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--- a/lib/isc/task.c
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+++ b/lib/isc/task.c
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@@ -473,7 +473,9 @@ task_ready(isc__task_t *task) {
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XTRACE("task_ready");
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LOCK(&manager->lock);
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+ LOCK(&task->lock);
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push_readyq(manager, task);
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+ UNLOCK(&task->lock);
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#ifdef USE_WORKER_THREADS
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if (manager->mode == isc_taskmgrmode_normal || has_privilege)
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SIGNAL(&manager->work_available);
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@@ -1263,7 +1265,9 @@ dispatch(isc__taskmgr_t *manager) {
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* might even hurt rather than help.
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*/
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#ifdef USE_WORKER_THREADS
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+ LOCK(&task->lock);
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push_readyq(manager, task);
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+ UNLOCK(&task->lock);
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#else
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ENQUEUE(new_ready_tasks, task, ready_link);
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if ((task->flags & TASK_F_PRIVILEGED) != 0)
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--
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2.21.0
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11
bind.spec
11
bind.spec
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@ -64,7 +64,7 @@ Summary: The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
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Name: bind
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License: MPLv2.0
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Version: 9.11.14
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Release: 1%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
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Release: 2%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
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Epoch: 32
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Url: https://www.isc.org/downloads/bind/
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#
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@ -165,6 +165,9 @@ Patch177: bind-9.11-serve-stale.patch
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Patch178: bind-9.11-serve-stale-dbfix.patch
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# https://bugzilla.redhat.com/show_bug.cgi?id=1736762
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Patch183: bind-9.11-rh1736762-5.patch
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Patch184: bind-9.11-rh1736762-6.patch
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Patch185: bind-9.11-rh1736762-7.patch
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Patch186: bind-9.11-rh1736762-8.patch
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# SDB patches
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Patch11: bind-9.3.2b2-sdbsrc.patch
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@ -571,6 +574,9 @@ are used for building ISC DHCP.
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%patch177 -p1 -b .serve-stale
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%patch178 -p1 -b .rh1770492
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%patch183 -p1 -b .rh1736762-5
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%patch184 -p1 -b .rh1736762-6
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%patch185 -p1 -b .rh1736762-7
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%patch186 -p1 -b .rh1736762-8
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mkdir lib/dns/tests/testdata/dstrandom
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cp -a %{SOURCE50} lib/dns/tests/testdata/dstrandom/random.data
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@ -1607,6 +1613,9 @@ fi;
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%changelog
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* Thu Dec 19 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.14-2
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- Include more Thread Sanitizer detected changes (#1736762)
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* Thu Dec 19 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.14-1
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- Update to 9.11.14
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