[PATCH] kvx: exclude dtb from malloc zone

[Sascha Hauer]

Hi Clement,

On Thu, Jul 09, 2020 at 10:22:04PM +0200, Clement Leger wrote:
> When dtb is provided by the FSBL (first stage bootloader), it might
> end up in the malloc zone initialized by barebox. While the dtb is
> discarded after being unflatten, if the dtb is provided right after
> barebox elf, then the malloc can overwrite it while unflattening it when
> allocating nodes.
> To avoid that, exclude the dtb from the malloc zone by checking if it
> overlaps it. If so, determine the largest zone for the allocation and
> modify the memory area to use that.

Isn't there some safe place where the dtb can be copied to? Making the
malloc area smaller seems a bit wasteful.

Sascha

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