[lwip-devel] [bug #61066] mdns_resp_remove_netif does not set service pointers to NULL after freeing

[Paul Reimer]

URL:
  <https://savannah.nongnu.org/bugs/?61066>

                 Summary: mdns_resp_remove_netif does not set service pointers
to NULL after freeing
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: zaber_paul
            Submitted on: Fri 20 Aug 2021 09:47:10 PM UTC
                Category: apps
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head

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Details:

mdns_resp_remove_netif calls mem_free on each element of the mdns->services
array, but it does not set the pointers to NULL after doing so (which becomes
an issue when repeatedly calling mdns_resp_add_netif / mdns_resp_remove_netif
during runtime):

https://git.savannah.nongnu.org/cgit/lwip.git/tree/src/apps/mdns/mdns.c#n2439




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