From 13b185182aeb48562cf63251b84bcf910b57a0fc Mon Sep 17 00:00:00 2001
From: Tomas Krizek <tkrizek@redhat.com>
Date: Mon, 27 Mar 2017 19:41:05 +0200
Subject: [PATCH] Coverity: fix REVERSE_INULL for pevent->inst
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With the DynDB API changes, the ldap instance is acquired
differently. Previously, obtaining the instance could fail when
LDAP was disconnecting, thus the NULL check was necessary in the
cleanup part.

Now, inst is obtained directly from the API. I'm not sure what is
the exact behaviour in edge cases such as LDAP disconnecting, so
I perform the NULL check a bit earlier, just to be safe.

Reviewed-By: Petr Menšík <pemensik@redhat.com>
---
 src/ldap_helper.c | 43 ++++++++++++++++++++++---------------------
 1 file changed, 22 insertions(+), 21 deletions(-)

diff --git a/src/ldap_helper.c b/src/ldap_helper.c
index 1fa0ec9adfa2b9ca589587244da03cc6f0584919..9e0174a785d41e2a809130b348345870ca880978 100644
--- a/src/ldap_helper.c
+++ b/src/ldap_helper.c
@@ -3714,6 +3714,7 @@ update_zone(isc_task_t *task, isc_event_t *event)
 	mctx = pevent->mctx;
 	dns_name_init(&prevname, NULL);
 
+	REQUIRE(inst != NULL);
 	INSIST(task == inst->task); /* For task-exclusive mode */
 
 	if (SYNCREPL_DEL(pevent->chgtype)) {
@@ -3730,12 +3731,11 @@ update_zone(isc_task_t *task, isc_event_t *event)
 	}
 
 cleanup:
-	if (inst != NULL) {
-		sync_concurr_limit_signal(inst->sctx);
-		sync_event_signal(inst->sctx, pevent);
-		if (dns_name_dynamic(&prevname))
-			dns_name_free(&prevname, inst->mctx);
-	}
+	sync_concurr_limit_signal(inst->sctx);
+	sync_event_signal(inst->sctx, pevent);
+	if (dns_name_dynamic(&prevname))
+		dns_name_free(&prevname, inst->mctx);
+
 	if (result != ISC_R_SUCCESS)
 		log_error_r("update_zone (syncrepl) failed for %s. "
 			    "Zones can be outdated, run `rndc reload`",
@@ -3760,14 +3760,14 @@ update_config(isc_task_t * task, isc_event_t *event)
 
 	mctx = pevent->mctx;
 
+	REQUIRE(inst != NULL);
 	INSIST(task == inst->task); /* For task-exclusive mode */
 	CHECK(ldap_parse_configentry(entry, inst));
 
 cleanup:
-	if (inst != NULL) {
-		sync_concurr_limit_signal(inst->sctx);
-		sync_event_signal(inst->sctx, pevent);
-	}
+	sync_concurr_limit_signal(inst->sctx);
+	sync_event_signal(inst->sctx, pevent);
+
 	if (result != ISC_R_SUCCESS)
 		log_error_r("update_config (syncrepl) failed for %s. "
 			    "Configuration can be outdated, run `rndc reload`",
@@ -3790,14 +3790,14 @@ update_serverconfig(isc_task_t * task, isc_event_t *event)
 
 	mctx = pevent->mctx;
 
+	REQUIRE(inst != NULL);
 	INSIST(task == inst->task); /* For task-exclusive mode */
 	CHECK(ldap_parse_serverconfigentry(entry, inst));
 
 cleanup:
-	if (inst != NULL) {
-		sync_concurr_limit_signal(inst->sctx);
-		sync_event_signal(inst->sctx, pevent);
-	}
+	sync_concurr_limit_signal(inst->sctx);
+	sync_event_signal(inst->sctx, pevent);
+
 	if (result != ISC_R_SUCCESS)
 		log_error_r("update_serverconfig (syncrepl) failed for %s. "
 			    "Configuration can be outdated, run `rndc reload`",
@@ -3860,6 +3860,7 @@ update_record(isc_task_t *task, isc_event_t *event)
 	dns_name_init(&prevname, NULL);
 	dns_name_init(&prevorigin, NULL);
 
+	REQUIRE(inst != NULL);
 	CHECK(zr_get_zone_ptr(inst->zone_register, &entry->zone_name, &raw, &secure));
 	zone_found = ISC_TRUE;
 
@@ -4020,13 +4021,12 @@ cleanup:
 			    ldap_entry_logname(entry), pevent->chgtype);
 	}
 
-	if (inst != NULL) {
-		sync_concurr_limit_signal(inst->sctx);
-		if (dns_name_dynamic(&prevname))
-			dns_name_free(&prevname, inst->mctx);
-		if (dns_name_dynamic(&prevorigin))
-			dns_name_free(&prevorigin, inst->mctx);
-	}
+	sync_concurr_limit_signal(inst->sctx);
+	if (dns_name_dynamic(&prevname))
+		dns_name_free(&prevname, inst->mctx);
+	if (dns_name_dynamic(&prevorigin))
+		dns_name_free(&prevorigin, inst->mctx);
+
 	if (raw != NULL)
 		dns_zone_detach(&raw);
 	if (secure != NULL)
@@ -4106,6 +4106,7 @@ syncrepl_update(ldap_instance_t *inst, ldap_entry_t **entryp, int chgtype)
 	isc_task_t *task = NULL;
 	isc_boolean_t synchronous;
 
+	REQUIRE(inst != NULL);
 	REQUIRE(entryp != NULL);
 	entry = *entryp;
 	REQUIRE(entry->class != LDAP_ENTRYCLASS_NONE);
-- 
2.9.3