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core: clear the entire TA area
Previously we cleared (memset to zero) the size corresponding to code and data segments, however the allocation for the TA is made on the granularity of the memory pool, meaning that we did not clear all memory and because of that we could potentially leak code and data of a previous loaded TA. Fixes: OP-TEE-2018-0006: "Potential disclosure of previously loaded TA code and data" Signed-off-by: Joakim Bech <email@example.com> Tested-by: Joakim Bech <firstname.lastname@example.org> (QEMU v7, v8) Suggested-by: Jens Wiklander <email@example.com> Reviewed-by: Jens Wiklander <firstname.lastname@example.org> Reported-by: Riscure <email@example.com> Reported-by: Alyssa Milburn <firstname.lastname@example.org> Acked-by: Etienne Carriere <email@example.com>
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