linux-kernel - RE: [PATCH] tpm: fix wrong return value in tpm_pcr

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Message-ID: <76d46ffbad294a6385779c29c4e5cafd@huawei.com>
Date:   Tue, 14 Apr 2020 11:55:43 +0000
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>,
        "peterhuewe@....de" <peterhuewe@....de>,
        "jarkko.sakkinen@...ux.intel.com" <jarkko.sakkinen@...ux.intel.com>,
        "jgg@...pe.ca" <jgg@...pe.ca>, "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "zhang.jia@...ux.alibaba.com" <zhang.jia@...ux.alibaba.com>
CC:     "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Silviu Vlasceanu" <Silviu.Vlasceanu@...wei.com>
Subject: RE: [PATCH] tpm: fix wrong return value in tpm_pcr_extend

> -----Original Message-----
> From: linux-integrity-owner@...r.kernel.org [mailto:linux-integrity-
> owner@...r.kernel.org] On Behalf Of Tianjia Zhang
> Sent: Tuesday, April 14, 2020 1:42 PM
> To: peterhuewe@....de; jarkko.sakkinen@...ux.intel.com; jgg@...pe.ca;
> arnd@...db.de; gregkh@...uxfoundation.org; zhang.jia@...ux.alibaba.com
> Cc: linux-integrity@...r.kernel.org; linux-kernel@...r.kernel.org;
> tianjia.zhang@...ux.alibaba.com
> Subject: [PATCH] tpm: fix wrong return value in tpm_pcr_extend
> 
> For the algorithm that does not match the bank, a positive
> value EINVAL is returned here. I think this is a typo error.
> It is necessary to return an error value.

Yes, thanks.

Reviewed-by: Roberto Sassu <roberto.sassu@...wei.com>

Roberto

HUAWEI TECHNOLOGIES Duesseldorf GmbH, HRB 56063
Managing Director: Li Peng, Li Jian, Shi Yanli


> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---
>  drivers/char/tpm/tpm-interface.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-
> interface.c
> index a438b1206fcb..1621ce818705 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -323,7 +323,7 @@ int tpm_pcr_extend(struct tpm_chip *chip, u32
> pcr_idx,
> 
>  	for (i = 0; i < chip->nr_allocated_banks; i++) {
>  		if (digests[i].alg_id != chip->allocated_banks[i].alg_id) {
> -			rc = EINVAL;
> +			rc = -EINVAL;
>  			goto out;
>  		}
>  	}
> --
> 2.17.1