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Code Issues Releases Wiki Activity

4107. [bug] Address potential deadlock when updating zone content.

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[RT #39269]
This commit is contained in:
Mark Andrews 2015-04-18 13:45:03 +10:00
parent 1413616670
commit ef0e674456
2 changed files with 12 additions and 5 deletions
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3
CHANGES
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@ -1,3 +1,6 @@
4107. [bug] Address potential deadlock when updating zone content.
[RT #39269]
4106. [port] Improve readline support. [RT #38938]
4105. [port] Misc fixes for Microsoft Visual Studio

14
lib/dns/rbtdb.c
View File

@ -2428,6 +2428,7 @@ setnsec3parameters(dns_db_t *db, rbtdb_version_t *version) {
unsigned int count, length;
dns_rbtdb_t *rbtdb = (dns_rbtdb_t *)db;
RWLOCK(&rbtdb->tree_lock, isc_rwlocktype_read);
version->havensec3 = ISC_FALSE;
node = rbtdb->origin_node;
NODE_LOCK(&(rbtdb->node_locks[node->locknum].lock),
@ -2504,6 +2505,7 @@ setnsec3parameters(dns_db_t *db, rbtdb_version_t *version) {
unlock:
NODE_UNLOCK(&(rbtdb->node_locks[node->locknum].lock),
isc_rwlocktype_read);
RWUNLOCK(&rbtdb->tree_lock, isc_rwlocktype_read);
}
static void
@ -2565,6 +2567,13 @@ closeversion(dns_db_t *db, dns_dbversion_t **versionp, isc_boolean_t commit) {
goto end;
}
/*
* Update the zone's secure status in version before making
* it the current version.
*/
if (version->writer && commit && !IS_CACHE(rbtdb))
iszonesecure(db, version, rbtdb->origin_node);
RBTDB_LOCK(&rbtdb->lock, isc_rwlocktype_write);
serial = version->serial;
if (version->writer) {
@ -2622,11 +2631,6 @@ closeversion(dns_db_t *db, dns_dbversion_t **versionp, isc_boolean_t commit) {
cleanup_version->changed_list,
link);
}
/*
* Update the zone's secure status.
*/
if (!IS_CACHE(rbtdb))
iszonesecure(db, version, rbtdb->origin_node);
/*
* Become the current version.
*/