[lwip-devel] [bug #66230] LWIP assert "pbuf_free: p->ref > 0" and "tcpip_thread: Invalid message" reported in lwip 2.2.0

[Kuldeep Siddheshwar Patil]

URL:
  <https://savannah.nongnu.org/bugs/?66230>

                 Summary: LWIP assert "pbuf_free: p->ref > 0" and
"tcpip_thread: Invalid message" reported in lwip 2.2.0
                   Group: lwIP - A Lightweight TCP/IP stack
               Submitter: kuldeepp
               Submitted: Thu 19 Sep 2024 06:27:35 AM UTC
                Category: pbufs
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.2.0


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Follow-up Comments:


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Date: Thu 19 Sep 2024 06:27:35 AM UTC By: Kuldeep Siddheshwar Patil <kuldeepp>
Currently, we are using lwip 2.2.0 version. We are runing basic ethernet
features such as iperf, mqtt, long ping together to test endurance. But we
observed that lwip assert is reported "pbuf_free: p->ref > 0" and
"tcpip_thread: Invalid message".

The current configuration we are using are  below,
PBUF_POOL_SIZE = 40
MEM_SIZE = 40 * 1024
LOCK_TCPIP_CORE() TCPIP core locking is enabled
MEMP_OVERFLOW_CHECK = 0
LWIP_TCPIP_CORE_LOCKING_INPUT =0
TCPIP_MBOX_SIZE = 32

When I investigated I found that, (netif->input( p, netif) != ERR_OK) this
condition is satisfied. but don't know the root cause of that. Request you to
please provide your input and if required more information for debug let me
know. Thanks in advance.







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