[lwip-users] lwip 2.0.3 "p->ref > 0" assert

[Sergio R. Caprile]

That assertion is telling you that "someone" is trying to free a pbuf 
that has already been freed. Either by "himself" or "someone else".

That can be:
- a misbehaving application. You should check with a well-written and 
known-to-work application
- a buggy port, check your vendor forums
- a user not honoring the threading rules. Which API are you using ? 
NO_SYS= ? Do you have all your calls to low-level functions on the same 
context ? (either all foreground or all interrupts, no mixes)
- perhaps a buggy driver could also trash memory, but most of the times 
it is a threading problem or a crappy application