Question：packet__queue function maybe have a memory leak

[Lieoxc]

I am using mosquitto compiled for the ATMEL Cortex-A5 as broker .
the mosquitto borker memory rises slowly，no stop.
I take some log in int packet__write(struct mosquitto *mosq) 。like that:

	while(packet->to_process > 0){
		write_length = net__write(mosq, &(packet->payload[packet->pos]), packet->to_process);
		if(write_length > 0){
			G_BYTES_SENT_INC(write_length);
			packet->to_process -= write_length;
			packet->pos += write_length;
		}else{
            #ifdef WIN32
                    errno = WSAGetLastError();
            #endif
			if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
				pthread_mutex_unlock(&mosq->current_out_packet_mutex);
				log__printf(NULL, MOSQ_LOG_INFO, "(%s,mid:%d): errno == EAGAIN or COMPAT_EWOULDBLOCK",mosq->id,packet->mid );
				return MOSQ_ERR_SUCCESS;// no free packet
			}else{
				pthread_mutex_unlock(&mosq->current_out_packet_mutex);
				switch(errno){
					case COMPAT_ECONNRESET:
						return MOSQ_ERR_CONN_LOST; // no free packet
					default:
						return MOSQ_ERR_ERRNO; // no free packet
				}
			}
		}
	}

beacuse my mqtt client is busy ,and cannot recv msg quickly，
when socket send buffer is fill, the net__write will cause errno == EAGAIN, then return MOSQ_ERR_SUCCESS without free packet.

when the next message need to pub, in int packet__queue(struct mosquitto *mosq, struct mosquitto__packet *packet) , i add some log :

packet->next = NULL;
pthread_mutex_lock(&mosq->out_packet_mutex);
if(mosq->out_packet){
	log__printf(NULL, MOSQ_LOG_INFO, "(%s,mid:%d): package to out_packet_last->Next,command:%x:",mosq->id,packet->mid,mosq->out_packet->command);
	mosq->out_packet_last->next = packet;
}else{
	log__printf(NULL, MOSQ_LOG_INFO, "(%s,mid:%d): package to out_packet:",mosq->id,packet->mid);
	mosq->out_packet = packet;
}
mosq->out_packet_last = packet;
pthread_mutex_unlock(&mosq->out_packet_mutex);
#ifdef WITH_BROKER
#  ifdef WITH_WEBSOCKETS
if(mosq->wsi){
	libwebsocket_callback_on_writable(mosq->ws_context, mosq->wsi);
	return 0;
}else{
	return packet__write(mosq);
}
#  else
int result = packet__write(mosq);
if(mosq->out_packet){
	log__printf(NULL, MOSQ_LOG_INFO, "(%s,mid:%d): out_packet is not NULL,command:%x :",mosq->id,packet->mid,mosq->out_packet->command);
}

return result;
#  endif

i fund that some times,it will run mosq->out_packet_last->next = packet; ,but i can not found anywhere to free mosq->out_packet_last, only see : mosq->out_packet_last = NULL

it is a memory leak? my mosquitto version is 1.5.0, but i use mosquitto 2.0.15 , it also cause memory rises slowly，no stop. i see mosquitto-2.0.15 packet__queue function and packet__write fucntion as same as mosquitto-1.5.0

this file is add log to packet__queue function ,it found some time, run mosq->out_packet_last->next = packet;
MqttServer_only_change_packet__queue.log

this file is add log to packet__queue function and packet__write function, it found that net__write cause errno == EAGAIN 。
my mqtt client run in STM singlechip ，CPU is 72MHz， cannot recv msg quickly
MqttServer.log