[lwip-devel] [bug #43437] Memory corruption beyound memory pool

[Piotr]

Follow-up Comment #2, bug #43437 (project lwip):

I saw it "in action" :)

The "ram" is set like this:
   ram = (u8_t *)LWIP_MEM_ALIGN(LWIP_RAM_HEAP_POINTER);
So, it points to a buffer, which is reserved outside LwIP. I have reserved
this buffer to be e.g:

   u8_t a_buffer[MEM_SIZE];

then (lwipopts.h):
#define LWIP_RAM_HEAP_POINTER a_buffer

It is clear that code in mem_init sets "ram_end" to the end of the buffer and
hence all writings to this structure corrupt variables located after the
pool.

Simple workaround 
   u8_t a_buffer[MEM_SIZE+8];

Fixes it. 

Maybe I have missed something from the "porting" steps, that could be the case
as well. 

Ragards, 
Piotr.

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