Messages in this thread Patch in this message | | | From | Jens Wiklander <> | Subject | [PATCH] optee: add error checks in optee_ffa_do_call_with_arg() | Date | Wed, 19 Jan 2022 09:07:36 +0100 |
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Adds error checking in optee_ffa_do_call_with_arg() for correctness.
Fixes: 4615e5a34b95 ("optee: add FF-A support") Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> --- drivers/tee/optee/ffa_abi.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c index d8c8683863aa..d88bd2e41572 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(arg)) + return PTR_ERR(arg); return optee_ffa_yielding_call(ctx, &data, rpc_arg); } -- 2.31.1
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