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Merge branch '2192-tsan-error-accessing-listener-connections' into 'main'

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Resolve "TSAN error accessing listener->connections"

Closes #2192

See merge request isc-projects/bind9!4206
This commit is contained in:
Mark Andrews 2020-10-01 07:13:09 +00:00
commit 061fb5e07e
1 changed files with 11 additions and 0 deletions
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11
bin/named/controlconf.c
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@ -96,6 +96,7 @@ struct controllistener {
dns_acl_t *acl;
bool exiting;
controlkeylist_t keys;
isc_mutex_t connections_lock;
controlconnectionlist_t connections;
isc_socktype_t type;
uint32_t perm;
@ -154,14 +155,19 @@ free_listener(controllistener_t *listener) {
if (listener->acl != NULL) {
dns_acl_detach(&listener->acl);
}
isc_mutex_destroy(&listener->connections_lock);
isc_mem_putanddetach(&listener->mctx, listener, sizeof(*listener));
}
static void
maybe_free_listener(controllistener_t *listener) {
LOCK(&listener->connections_lock);
if (listener->exiting && ISC_LIST_EMPTY(listener->connections)) {
UNLOCK(&listener->connections_lock);
free_listener(listener);
} else {
UNLOCK(&listener->connections_lock);
}
}
@ -571,7 +577,9 @@ conn_reset(void *arg) {
return;
}
LOCK(&listener->connections_lock);
ISC_LIST_UNLINK(listener->connections, conn, link);
UNLOCK(&listener->connections_lock);
#ifdef ENABLE_AFL
if (named_g_fuzz_type == isc_fuzz_rndc) {
named_fuzz_notify();
@ -629,7 +637,9 @@ newconnection(controllistener_t *listener, isc_nmhandle_t *handle) {
goto cleanup;
}
LOCK(&listener->connections_lock);
ISC_LIST_APPEND(listener->connections, conn, link);
UNLOCK(&listener->connections_lock);
return (ISC_R_SUCCESS);
cleanup:
@ -1129,6 +1139,7 @@ add_listener(named_controls_t *cp, controllistener_t **listenerp,
.address = *addr,
.type = type };
isc_mem_attach(mctx, &listener->mctx);
isc_mutex_init(&listener->connections_lock);
ISC_LINK_INIT(listener, link);
ISC_LIST_INIT(listener->keys);
ISC_LIST_INIT(listener->connections);