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H A Dsystem.c18871ad0cecba19a366008e6a9bf4cf724750094 Thu Mar 19 14:42:18 UTC 2020 Jens Wiklander <jens.wiklander@linaro.org> core: add overflow guard in system_set_prot()

Adds an early overflow guard in system_set_prot() against large va or sz
values.

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jerome Forissier <jerome@forissier.org>
Reported-by: Bastien Simondi <bsimondi@netflix.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>