[ Upstream commit a73d4e1490913b76b292f91553b7ba08a65caa3f ]

This patch fixes a off-by-one mistake in nla_parse_nested() functions of
mac802154_hwsim driver. I had to enabled stack protector so I was able
to reproduce it.

Reference: https://github.com/linux-wpan/wpan-tools/issues/17Signed-off-by: NAlexander Aring <aring@mojatatu.com>
Signed-off-by: NStefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>