RE: [PATCH] tpm: fix wrong return value in tpm_pcr_extend

[Roberto Sassu <roberto.sassu@huawei.com>]

> -----Original Message-----
> From: linux-integrity-owner@vger.kernel.org [mailto:linux-integrity-
> owner@vger.kernel.org] On Behalf Of Tianjia Zhang
> Sent: Tuesday, April 14, 2020 1:42 PM
> To: peterhuewe@gmx.de; jarkko.sakkinen@linux.intel.com; jgg@ziepe.ca;
> arnd@arndb.de; gregkh@linuxfoundation.org; zhang.jia@linux.alibaba.com
> Cc: linux-integrity@vger.kernel.org; linux-kernel@vger.kernel.org;
> tianjia.zhang@linux.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@huawei.com>

Roberto

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


> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.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