runtime error: applying zero offset to null pointer

[gazer-star]

Describe the bug
runtime error: applying zero offset to null pointer.

// ./nanomq/nng/src/core/list.c:
void *
nni_list_first(const nni_list *list)
{
	nni_list_node *node = list->ll_head.ln_next;

	if (node == &list->ll_head) {
		return (NULL);
	}
	return (ITEM(list, node)); // null pointer.
}

To Reproduce
Build with UBSan: -DCMAKE_CXX_FLAGS="-g -O1 -fsanitize=address,undefined"
Start two nanomq server with different tcp address but the same ws address. (remove the pid file in /tmp/nanomq/nanomq.pid)

server 1

./nanomq

server2

./nanomq tart --url nmq-tcp://0.0.0.0:4453

Server Logs as follow

Additional context

2024-04-05 21:58:36 [2627426] ERROR /home/user/nanomq/nng/src/supplemental/nanolib/conf_ver2.c:1202 conf_parse_ver2: Configure file [(null)] or [/etc/nanomq.conf] not found or unreadable
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1141 print_conf: This NanoMQ instance configured as:
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1144 print_conf: tcp url:                  nmq-tcp://0.0.0.0:4453 
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1148 print_conf: websocket url:            nmq-ws://0.0.0.0:8083/mqtt
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1166 print_conf: daemon:                   false
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1168 print_conf: num_taskq_thread:         32
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1170 print_conf: max_taskq_thread:         32
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1171 print_conf: parallel:                 32
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1172 print_conf: property_size:            32
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1173 print_conf: max_packet_size:          1048576
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1175 print_conf: client_max_packet_size:   1048576
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1176 print_conf: msq_len:                  2048
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1177 print_conf: qos_duration:             10
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1178 print_conf: keepalive_backoff:        1.500000
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1215 print_conf: allow_anonymous:          true
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1219 print_conf: acl_nomatch:              allow
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1221 print_conf: enable_acl_cache:         on
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1223 print_conf: acl_cache_max_size:       32
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1224 print_conf: acl_cache_ttl:            60
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nng/src/supplemental/nanolib/conf.c:1227 print_conf: acl_deny_action:          ignore
2024-04-05 21:58:36 [2627426] INFO  /home/user/nanomq/nanomq/apps/broker.c:1272 store_pid: 2627426
nng_listen ws: Address in use
/home/user/nanomq/nng/src/core/list.c:39:10: runtime error: applying zero offset to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/user/nanomq/nng/src/core/list.c:39:10 in 

[wanghaEMQ]

Hi. Could you show the version number of commitid of nanomq you are using?

[wanghaEMQ]

I can't reproduce this issue on my pc.

./nanomq/nanomq start
Config file is not specified, use default config file: /etc/nanomq.conf
2024-04-13 03:34:35 [222557] ERROR /home/wangha/Documents/nanomq/nng/src/supplemental/nanolib/conf_ver2.c:1532  conf_parse_ver2: Configure file [/etc/nanomq.conf] or [/etc/nanomq.conf] not found or unreadable
NanoMQ Broker is started successfully!

./nanomq/nanomq start --url nmq-tcp://0.0.0.0:4453
Config file is not specified, use default config file: /etc/nanomq.conf
2024-04-13 03:34:48 [222678] ERROR /home/wangha/Documents/nanomq/nng/src/supplemental/nanolib/conf_ver2.c:1532  conf_parse_ver2: Configure file [/etc/nanomq.conf] or [/etc/nanomq.conf] not found or unreadable
NanoMQ Broker is started successfully!
^C
Broker exit(0).

[JaylinYu]

A pretty interesting way to test nanomq.
Anyway I doubt anyone would use it in such a strange way. even so, we don't recommend user to creat conflict listening address on websocket as well.
so I label it as invalid