a-lunev opened a new pull request #5373:
URL: https://github.com/apache/incubator-nuttx/pull/5373


   ## Summary
   
   Added debug asserts and logging to investigate the rare (conn->dev == NULL) 
bug in TCP callback handlers.
   The discussion of the noticed bug started here: 
https://github.com/apache/incubator-nuttx/pull/5252#pullrequestreview-861912204
   
   As it turned out, the issue was mentioned initially in 2015 here: 
https://github.com/apache/incubator-nuttx/blob/63071a563a1f7646dab9a6bd718d8b4b550471c4/net/socket/net_monitor.c#L166
   
   ## Impact
   
   TCP
   
   ## Testing
   
   CONFIG_DEBUG_ASSERTIONS and CONFIG_DEBUG_NET_ERROR need to be enabled.


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