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authorJens Wiklander <jens.wiklander@linaro.org>2021-12-28 21:25:57 +0100
committerJens Wiklander <jens.wiklander@linaro.org>2022-01-24 13:00:59 +0100
commit4064c461148ab129dfe5eaeea129b4af6cf4b9b7 (patch)
tree35f43aad8d9117fcbbf19d1f00780cbdb6d7c0ed /drivers/tee/optee
parenttee: optee: do not check memref size on return from Secure World (diff)
downloadlinux-4064c461148ab129dfe5eaeea129b4af6cf4b9b7.tar.xz
linux-4064c461148ab129dfe5eaeea129b4af6cf4b9b7.zip
optee: add error checks in optee_ffa_do_call_with_arg()
Adds error checking in optee_ffa_do_call_with_arg() for correctness. Fixes: 4615e5a34b95 ("optee: add FF-A support") Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee')
-rw-r--r--drivers/tee/optee/ffa_abi.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c
index 20a1b1a3d965..0775759a29c0 100644
--- a/drivers/tee/optee/ffa_abi.c
+++ b/drivers/tee/optee/ffa_abi.c
@@ -619,9 +619,18 @@ static int optee_ffa_do_call_with_arg(struct tee_context *ctx,
.data2 = (u32)(shm->sec_world_id >> 32),
.data3 = shm->offset,
};
- struct optee_msg_arg *arg = tee_shm_get_va(shm, 0);
- unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
- struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
+ struct optee_msg_arg *arg;
+ unsigned int rpc_arg_offs;
+ struct optee_msg_arg *rpc_arg;
+
+ arg = tee_shm_get_va(shm, 0);
+ if (IS_ERR(arg))
+ return PTR_ERR(arg);
+
+ rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
+ rpc_arg = tee_shm_get_va(shm, rpc_arg_offs);
+ if (IS_ERR(rpc_arg))
+ return PTR_ERR(rpc_arg);
return optee_ffa_yielding_call(ctx, &data, rpc_arg);
}