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Merge branch 'rpz-shutdown-crash' into 'master'

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Fix crash at shutdown during an RPZ reload. [RT #46210]

See merge request isc-projects/bind9!71
This commit is contained in:
Evan Hunt 2018-10-05 13:59:26 -04:00
commit 9bf25f7f1e
2 changed files with 57 additions and 34 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
5046. [bug] named could crash during shutdown if an RPZ
reload was in progress. [RT #46210]
5045. [cleanup] Remove support for DNSSEC algorithms 3 (DSA)
and 6 (DSA-NSEC3-SHA1). [GL #22]

88
lib/dns/rpz.c
View File

@ -2052,40 +2052,59 @@ rpz_detach(dns_rpz_zone_t **rpzp, dns_rpz_zones_t *rpzs) {
dns_rpz_zone_t *rpz = *rpzp;
*rpzp = NULL;
if (isc_refcount_decrement(&rpz->refs) == 1) {
isc_refcount_destroy(&rpz->refs);
if (dns_name_dynamic(&rpz->origin))
dns_name_free(&rpz->origin, rpzs->mctx);
if (dns_name_dynamic(&rpz->client_ip))
dns_name_free(&rpz->client_ip, rpzs->mctx);
if (dns_name_dynamic(&rpz->ip))
dns_name_free(&rpz->ip, rpzs->mctx);
if (dns_name_dynamic(&rpz->nsdname))
dns_name_free(&rpz->nsdname, rpzs->mctx);
if (dns_name_dynamic(&rpz->nsip))
dns_name_free(&rpz->nsip, rpzs->mctx);
if (dns_name_dynamic(&rpz->passthru))
dns_name_free(&rpz->passthru, rpzs->mctx);
if (dns_name_dynamic(&rpz->drop))
dns_name_free(&rpz->drop, rpzs->mctx);
if (dns_name_dynamic(&rpz->tcp_only))
dns_name_free(&rpz->tcp_only, rpzs->mctx);
if (dns_name_dynamic(&rpz->cname))
dns_name_free(&rpz->cname, rpzs->mctx);
if (rpz->db_registered)
dns_db_updatenotify_unregister(rpz->db,
dns_rpz_dbupdate_callback, rpz);
if (rpz->dbversion != NULL)
dns_db_closeversion(rpz->db, &rpz->dbversion,
false);
if (rpz->db)
dns_db_detach(&rpz->db);
isc_ht_destroy(&rpz->nodes);
isc_timer_detach(&rpz->updatetimer);
isc_mem_put(rpzs->mctx, rpz, sizeof(*rpz));
if (isc_refcount_decrement(&rpz->refs) != 1) {
return;
}
isc_refcount_destroy(&rpz->refs);
if (dns_name_dynamic(&rpz->origin)) {
dns_name_free(&rpz->origin, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->client_ip)) {
dns_name_free(&rpz->client_ip, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->ip)) {
dns_name_free(&rpz->ip, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->nsdname)) {
dns_name_free(&rpz->nsdname, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->nsip)) {
dns_name_free(&rpz->nsip, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->passthru)) {
dns_name_free(&rpz->passthru, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->drop)) {
dns_name_free(&rpz->drop, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->tcp_only)) {
dns_name_free(&rpz->tcp_only, rpzs->mctx);
}
if (dns_name_dynamic(&rpz->cname)) {
dns_name_free(&rpz->cname, rpzs->mctx);
}
if (rpz->db_registered) {
dns_db_updatenotify_unregister(rpz->db,
dns_rpz_dbupdate_callback, rpz);
}
if (rpz->dbversion != NULL) {
dns_db_closeversion(rpz->db, &rpz->dbversion, false);
}
if (rpz->db) {
dns_db_detach(&rpz->db);
}
if (rpz->updaterunning) {
isc_task_purgeevent(rpz->rpzs->updater, &rpz->updateevent);
}
isc_timer_reset(rpz->updatetimer, isc_timertype_inactive,
NULL, NULL, true);
isc_timer_detach(&rpz->updatetimer);
isc_ht_destroy(&rpz->nodes);
isc_mem_put(rpzs->mctx, rpz, sizeof(*rpz));
}
void
@ -2107,7 +2126,8 @@ dns_rpz_detach_rpzs(dns_rpz_zones_t **rpzsp) {
if (isc_refcount_decrement(&rpzs->refs) == 1) {
isc_refcount_destroy(&rpzs->refs);
/*
* Forget the last of view's rpz machinery after the last reference.
* Forget the last of view's rpz machinery after
* the last reference.
*/
for (dns_rpz_num_t rpz_num = 0;
rpz_num < DNS_RPZ_MAX_ZONES;