Messages in this thread | | | From | Sumit Garg <> | Date | Thu, 20 Jan 2022 16:48:12 +0530 | Subject | Re: [PATCH v2] optee: add error checks in optee_ffa_do_call_with_arg() |
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On Thu, 20 Jan 2022 at 13:12, Jens Wiklander <jens.wiklander@linaro.org> wrote: > > 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(-) >
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
-Sumit
> 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); > } > -- > 2.31.1 >
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