[lwip-users] pcb->next points to one of its ancestors causing an endless loop

[Philipp Zug]

Hi there!

I am using the LwIP-Stack on a Microcontroller without an OS directly
interfacing with the stack (via tcp_write, tcp_close and so on ...).
Under some rare circumstances, that I do not comprehend, it may happen
that one pcb points with its 'next' pointer to one of its ancestors
pointing on it. This causes an endless loop in the LwIP-Stack.
Example:
pcb A -> pcb B -> pcb C -> pcb A ....

Has anyone experienced a similar problem or any clue what could be wrong?

Thanks for your help,
phil