diff --git a/src/bin/pg_autoctl/ipaddr.c b/src/bin/pg_autoctl/ipaddr.c
index 7f61d49f5..5c6dff480 100644
--- a/src/bin/pg_autoctl/ipaddr.c
+++ b/src/bin/pg_autoctl/ipaddr.c
@@ -537,9 +537,11 @@ findHostnameLocalAddress(const char *hostname, char *localIpAddress, int size)
 								  size) == NULL)
 					{
 						log_warn("Failed to determine local ip address: %m");
+						freeifaddrs(ifaddrList);
 						return false;
 					}
 
+					freeifaddrs(ifaddrList);
 					return true;
 				}
 			}
@@ -565,15 +567,18 @@ findHostnameLocalAddress(const char *hostname, char *localIpAddress, int size)
 					{
 						/* check size >= INET6_ADDRSTRLEN */
 						log_warn("Failed to determine local ip address: %m");
+						freeifaddrs(ifaddrList);
 						return false;
 					}
 
+					freeifaddrs(ifaddrList);
 					return true;
 				}
 			}
 		}
 	}
 
+	freeifaddrs(ifaddrList);
 	freeaddrinfo(dns_lookup_addr);
 	return false;
 }
diff --git a/src/bin/pg_autoctl/monitor.c b/src/bin/pg_autoctl/monitor.c
index 04c6dc746..8e473ee9f 100644
--- a/src/bin/pg_autoctl/monitor.c
+++ b/src/bin/pg_autoctl/monitor.c
@@ -416,6 +416,10 @@ monitor_print_nodes_as_json(Monitor *monitor, char *formation, int groupId)
 		log_error("Failed to get the nodes from the monitor while running "
 				  "\"%s\" with formation %s and group %d",
 				  sql, formation, groupId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
@@ -429,10 +433,15 @@ monitor_print_nodes_as_json(Monitor *monitor, char *formation, int groupId)
 				  "it returned an unexpected result. "
 				  "See previous line for details.",
 				  sql, formation, groupId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	fformat(stdout, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -559,6 +568,10 @@ monitor_print_other_nodes_as_json(Monitor *monitor,
 	{
 		log_error("Failed to get the other nodes from the monitor while running "
 				  "\"%s\" with node id %d", sql, myNodeId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
@@ -571,10 +584,15 @@ monitor_print_other_nodes_as_json(Monitor *monitor,
 				  "\"%s\" with node id %d because it returned an "
 				  "unexpected result. See previous line for details.",
 				  sql, myNodeId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	fformat(stdout, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -1977,10 +1995,15 @@ monitor_print_state_as_json(Monitor *monitor, char *formation, int group)
 	{
 		log_error("Failed to parse current state from the monitor");
 		log_error("%s", context.strVal);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	fformat(stdout, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -2142,10 +2165,15 @@ monitor_print_last_events_as_json(Monitor *monitor,
 	{
 		log_error("Failed to parse %d last events from the monitor", count);
 		log_error("%s", context.strVal);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	fformat(stream, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -2379,6 +2407,10 @@ monitor_formation_uri(Monitor *monitor,
 	if (!context.parsedOk)
 	{
 		/* errors have already been logged */
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
@@ -2386,10 +2418,15 @@ monitor_formation_uri(Monitor *monitor,
 	{
 		log_error("Formation \"%s\" currently has no nodes in group 0",
 				  formation);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	strlcpy(connectionString, context.strVal, size);
+	free(context.strVal);
 
 	/* disconnect from PostgreSQL now */
 	pgsql_finish(&monitor->pgsql);
@@ -2490,6 +2527,10 @@ monitor_print_every_formation_uri_as_json(Monitor *monitor,
 	if (!context.parsedOk)
 	{
 		/* errors have already been logged */
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
@@ -2497,6 +2538,7 @@ monitor_print_every_formation_uri_as_json(Monitor *monitor,
 	pgsql_finish(&monitor->pgsql);
 
 	fformat(stream, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -2752,10 +2794,15 @@ monitor_print_formation_settings_as_json(Monitor *monitor, char *formation)
 	{
 		log_error("Failed to parse formation settings from the monitor "
 				  "for formation \"%s\"", formation);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	fformat(stdout, "%s\n", context.strVal);
+	free(context.strVal);
 
 	return true;
 }
@@ -2794,6 +2841,10 @@ monitor_synchronous_standby_names(Monitor *monitor,
 		log_error("Failed to get the synchronous_standby_names setting value "
 				  " from the monitor for formation %s and group %d",
 				  formation, groupId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
@@ -2803,10 +2854,15 @@ monitor_synchronous_standby_names(Monitor *monitor,
 				  " from the monitor for formation %s and group %d,"
 				  "see above for details",
 				  formation, groupId);
+		if (context.strVal)
+		{
+			free(context.strVal);
+		}
 		return false;
 	}
 
 	strlcpy(synchronous_standby_names, context.strVal, size);
+	free(context.strVal);
 
 	return true;
 }
diff --git a/src/bin/pg_autoctl/parsing.c b/src/bin/pg_autoctl/parsing.c
index 386e77d58..084a6d595 100644
--- a/src/bin/pg_autoctl/parsing.c
+++ b/src/bin/pg_autoctl/parsing.c
@@ -267,6 +267,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	if (json_type(json) != JSONObject)
 	{
 		log_error("Failed to parse JSON notification message: \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 
@@ -276,6 +277,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse JSOBJ notification state message: "
 				  "jsobj object type is not \"state\" as expected");
+		json_value_free(json);
 		return false;
 	}
 
@@ -285,6 +287,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse formation in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 	strlcpy(nodeState->formation, str, sizeof(nodeState->formation));
@@ -301,6 +304,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse node name in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 	strlcpy(nodeState->node.name, str, sizeof(nodeState->node.name));
@@ -311,6 +315,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse node host in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 	strlcpy(nodeState->node.host, str, sizeof(nodeState->node.host));
@@ -324,6 +329,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse reportedState in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 	nodeState->reportedState = NodeStateFromString(str);
@@ -334,6 +340,7 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse goalState in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 	nodeState->goalState = NodeStateFromString(str);
@@ -356,9 +363,11 @@ parse_state_notification_message(CurrentNodeState *nodeState,
 	{
 		log_error("Failed to parse health in JSON "
 				  "notification message \"%s\"", message);
+		json_value_free(json);
 		return false;
 	}
 
+	json_value_free(json);
 	return true;
 }
 
@@ -761,6 +770,8 @@ parseNodesArray(const char *nodesJSON,
 				  "[{node_id:number, node_name:string, "
 				  "node_host:string, node_port:number, node_lsn:string, "
 				  "node_is_primary:boolean}, ...]");
+		json_value_free(template);
+		json_value_free(json);
 		return false;
 	}
 
@@ -773,6 +784,8 @@ parseNodesArray(const char *nodesJSON,
 				  "%d nodes: pg_autoctl supports up to %d nodes",
 				  len,
 				  NODE_ARRAY_MAX_COUNT);
+		json_value_free(template);
+		json_value_free(json);
 		return false;
 	}
 
@@ -812,6 +825,8 @@ parseNodesArray(const char *nodesJSON,
 		if (!parseLSN(node->lsn, &lsn))
 		{
 			log_error("Failed to parse nodes array LSN value \"%s\"", node->lsn);
+			json_value_free(template);
+			json_value_free(json);
 			return false;
 		}
 
@@ -825,6 +840,8 @@ parseNodesArray(const char *nodesJSON,
 			{
 				log_error("Failed to parse nodes array: more than one node "
 						  "is listed with \"node_is_primary\" true.");
+				json_value_free(template);
+				json_value_free(json);
 				return false;
 			}
 		}
@@ -832,6 +849,9 @@ parseNodesArray(const char *nodesJSON,
 		++nodesArrayIndex;
 	}
 
+	json_value_free(template);
+	json_value_free(json);
+
 	/* now ensure the array is sorted by nodeId */
 	(void) pg_qsort(nodesArray->nodes,
 					nodesArray->count,
diff --git a/src/bin/pg_autoctl/pgsetup.c b/src/bin/pg_autoctl/pgsetup.c
index fa9f9d38d..42e6b5de8 100644
--- a/src/bin/pg_autoctl/pgsetup.c
+++ b/src/bin/pg_autoctl/pgsetup.c
@@ -460,15 +460,20 @@ get_pgpid(PostgresSetup *pgSetup, bool pgIsNotRunningIsOk)
 	{
 		/* yeah, that happens (race condition, kind of) */
 		log_debug("The PID file \"%s\" is empty", pidfile);
+		free(contents);
 		return false;
 	}
 	else if (splitLines(contents, lines, 1) != 1 ||
 			 !stringToInt(lines[0], &pid))
 	{
 		log_warn("Invalid data in PID file \"%s\"", pidfile);
+		free(contents);
 		return false;
 	}
 
+	free(contents);
+	contents = NULL;
+
 	/* postmaster PID (or negative of a standalone backend's PID) */
 	if (pid < 0)
 	{
@@ -764,6 +769,7 @@ pg_setup_get_local_connection_string(PostgresSetup *pgSetup,
 		!get_env_copy("PG_REGRESS_SOCK_DIR", pg_regress_sock_dir, MAXPGPATH))
 	{
 		/* errors have already been logged */
+		destroyPQExpBuffer(connStringBuffer);
 		return false;
 	}
 
@@ -816,8 +822,11 @@ pg_setup_get_local_connection_string(PostgresSetup *pgSetup,
 				  "long, pg_autoctl only supports connection strings up to "
 				  " %d bytes",
 				  connStringBuffer->data, connStringBuffer->len, MAXCONNINFO);
+		destroyPQExpBuffer(connStringBuffer);
+		return false;
 	}
 
+	destroyPQExpBuffer(connStringBuffer);
 	return true;
 }