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H A Dspmc_shared_mem.ceed15e4310a7bcd90bf6d66b00037e05186329bb Tue Oct 18 13:03:13 UTC 2022 Marc Bonnici <marc.bonnici@arm.com> fix(el3-spmc): check descriptor size for overflow

Ensure that the provided descriptor size used when reserving space
for a memory descriptor does not overflow to prevent scope for
memory corruption. Reported by Matt Oh, Google Android Red Team.

Reported-by: mattoh@google.com
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: If06985c4de9a88ff82ce60d10e346da948ed383f