linux-hardening - Re: [PATCH] scsi: csiostor: Use kcalloc() instead of kzalloc()

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Date: Fri, 12 Jan 2024 12:43:23 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: Erick Archer <erick.archer@....com>,
 "James E.J. Bottomley" <jejb@...ux.ibm.com>,
 "Martin K. Petersen" <martin.petersen@...cle.com>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Kees Cook <keescook@...omium.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
 Justin Stitt <justinstitt@...gle.com>, linux-scsi@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] scsi: csiostor: Use kcalloc() instead of kzalloc()

On 1/12/24 12:26, Erick Archer wrote:
> Use 2-factor multiplication argument form kcalloc() instead
> of kzalloc().
> 
> Link: https://github.com/KSPP/linux/issues/162
> Signed-off-by: Erick Archer <erick.archer@....com>
> ---
>   drivers/scsi/csiostor/csio_init.c | 15 +++++----------
>   1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c
> index d649b7a2a879..d72892e44fd1 100644
> --- a/drivers/scsi/csiostor/csio_init.c
> +++ b/drivers/scsi/csiostor/csio_init.c
> @@ -698,8 +698,7 @@ csio_lnodes_block_request(struct csio_hw *hw)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);

You should also mention and describe these `sizeof` changes in the changelog text.

Thanks
--
Gustavo