Re: [lwip-members] accessing NULL pbuf in new code

[David Haas]

Hi Jani,

I saw that briefly, but I want to have a closer look, because I might 
want the callback to be made anyway with a zero length. If so, I'll 
change it.

I had done some quick tcp testing, but I guess I did'nt ctrl-c the client.

David.


Jani Monoses wrote:

> Hi 
> David I fixed two NULL pbuf accesses in new select() callback related code
> They seem easy enough but might not be the best since I have not looked at the 
> select
> code as a whole and maybe some similar fixes are needed in other places where
> p->tot_len is modified without checking whether it's a valid pbuf.
> The crashes I got and fixed happen when recv_tcp and netconn_recv get NULL pbuf
> which can happen when a FIN packet arrives.Simply CTRL-C ing a client which 
> talked to the unix
> simulator caused the latter to crash.
> (In api_lib.c and api_msg.c )
>
> Jani.
>
>
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