Simon Goldschmidt a156c47e39 tftp: prevent overwriting reserved memory
This fixes CVE-2018-18439 ("insufficient boundary checks in network
image boot") by using lmb to check for a valid range to store
received blocks.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
[trini: Always build lib/lmb.o on LMB and lib/fdtdec.o on OF_LIBFDT]
Signed-off-by: Tom Rini <trini@konsulko.com>
2019-01-16 23:15:53 -05:00
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