linux-kernel - Re: [PATCH] optee: smc_abi.c: fix wrong pointer passed to IS_ERR/PTR

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Message-ID: <CAHUa44Gxs9-wB6xJ9+Fbkgzw+n8UkpLOzj0GDX4toH_O5Dtqwg@mail.gmail.com>
Date:   Mon, 11 Jul 2022 08:09:22 +0200
From:   Jens Wiklander <jens.wiklander@...aro.org>
To:     Yang Yingliang <yangyingliang@...wei.com>
Cc:     linux-kernel@...r.kernel.org, op-tee@...ts.trustedfirmware.org,
        sumit.garg@...aro.org
Subject: Re: [PATCH] optee: smc_abi.c: fix wrong pointer passed to IS_ERR/PTR_ERR()

On Tue, Jun 28, 2022 at 8:42 AM Yang Yingliang <yangyingliang@...wei.com> wrote:
>
> It should be 'rpc_arg' pass to IS_ERR/PTR_ERR().
>
> Fixes: ed8faf6c8f8c ("optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and OPTEE_SMC_CALL_WITH_REGD_ARG")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
>  drivers/tee/optee/smc_abi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

I'm picking up this. I've added some description in the commit message.

Thanks,
Jens

>
> diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
> index 385cb0aee610..a1c1fa1a9c28 100644
> --- a/drivers/tee/optee/smc_abi.c
> +++ b/drivers/tee/optee/smc_abi.c
> @@ -884,8 +884,8 @@ static int optee_smc_do_call_with_arg(struct tee_context *ctx,
>
>                 rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
>                 rpc_arg = tee_shm_get_va(shm, offs + rpc_arg_offs);
> -               if (IS_ERR(arg))
> -                       return PTR_ERR(arg);
> +               if (IS_ERR(rpc_arg))
> +                       return PTR_ERR(rpc_arg);
>         }
>
>         if  (rpc_arg && tee_shm_is_dynamic(shm)) {
> --
> 2.25.1
>