The current FDT decoding tests calculate the memory required
for FDT manipulation by directly adding a fixed margin to
fdt_totalsize(gd->fdt_blob). The static analyzer flagged
"gd->fdt_blob->totalsize" as a tainted value being passed
to fdt_open_into().
Ensure the size is validated by checking that the total size
is within a reasonable maximum FDT limit for unit tests.
Signed-off-by: Adriana Nicolae <adriana@arista.com>
93d000bc52