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Jerome Forissier 9584ce366c tee: optee: do not check memref size on return from Secure World

[ Upstream commit c650b8dc7a7910eb25af0aac1720f778b29e679d ]

When Secure World returns, it may have changed the size attribute of the
memory references passed as [in/out] parameters. The GlobalPlatform TEE
Internal Core API specification does not restrict the values that this
size can take. In particular, Secure World may increase the value to be
larger than the size of the input buffer to indicate that it needs more.

Therefore, the size check in optee_from_msg_param() is incorrect and
needs to be removed. This fixes a number of failed test cases in the
GlobalPlatform TEE Initial Configuratiom Test Suite v2_0_0_0-2017_06_09
when OP-TEE is compiled without dynamic shared memory support
(CFG_CORE_DYN_SHM=n).

Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Suggested-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-05-11 14:47:18 +02:00

call.c

tee: optee: replace might_sleep with cond_resched

2021-02-03 23:28:43 +01:00

core.c

tee: optee: do not check memref size on return from Secure World

2021-05-11 14:47:18 +02:00

device.c

optee: enable support for multi-stage bus enumeration

2020-07-10 09:41:53 +02:00

Kconfig

tee: optee: Fix compilation issue with nommu