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authorJerome Forissier <jerome@forissier.org>2021-03-22 11:40:37 +0100
committerJens Wiklander <jens.wiklander@linaro.org>2021-03-30 10:44:50 +0200
commitc650b8dc7a7910eb25af0aac1720f778b29e679d (patch)
tree18a62c7103b2ce9cec1e1b090f9c54bbc0de1604 /drivers/tee/optee
parenta38fd8748464831584a19438cbb3082b5a2dab15 (diff)
downloadlinux-c650b8dc7a7910eb25af0aac1720f778b29e679d.tar.bz2
tee: optee: do not check memref size on return from Secure World
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>
Diffstat (limited to 'drivers/tee/optee')
-rw-r--r--drivers/tee/optee/core.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index cf4718c6d35d..63542c1cc291 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -79,16 +79,6 @@ int optee_from_msg_param(struct tee_param *params, size_t num_params,
return rc;
p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
p->u.memref.shm = shm;
-
- /* Check that the memref is covered by the shm object */
- if (p->u.memref.size) {
- size_t o = p->u.memref.shm_offs +
- p->u.memref.size - 1;
-
- rc = tee_shm_get_pa(shm, o, NULL);
- if (rc)
- return rc;
- }
break;
case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT: