linux-kernel - Re: [PATCH] [v2] scsi: scsi_debug: Fix memleak in scsi_debug

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Date:   Sat, 26 Dec 2020 19:46:39 -0500
From:   Douglas Gilbert <dgilbert@...erlog.com>
To:     Dinghao Liu <dinghao.liu@....edu.cn>, kjlu@....edu
Cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] scsi: scsi_debug: Fix memleak in scsi_debug_init

On 2020-12-26 1:15 a.m., Dinghao Liu wrote:
> When sdeb_zbc_model does not match BLK_ZONED_NONE,
> BLK_ZONED_HA or BLK_ZONED_HM, we should free sdebug_q_arr
> to prevent memleak. Also there is no need to execute
> sdebug_erase_store() on failure of sdeb_zbc_model_str().
> 
> Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>

Acked-by: Douglas Gilbert <dgilbert@...erlog.com>

Thanks.

> ---
> 
> Changelog:
> 
> v2: - Add missed assignment statement for ret.
> ---
>   drivers/scsi/scsi_debug.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
> index 24c0f7ec0351..4a08c450b756 100644
> --- a/drivers/scsi/scsi_debug.c
> +++ b/drivers/scsi/scsi_debug.c
> @@ -6740,7 +6740,7 @@ static int __init scsi_debug_init(void)
>   		k = sdeb_zbc_model_str(sdeb_zbc_model_s);
>   		if (k < 0) {
>   			ret = k;
> -			goto free_vm;
> +			goto free_q_arr;
>   		}
>   		sdeb_zbc_model = k;
>   		switch (sdeb_zbc_model) {
> @@ -6753,7 +6753,8 @@ static int __init scsi_debug_init(void)
>   			break;
>   		default:
>   			pr_err("Invalid ZBC model\n");
> -			return -EINVAL;
> +			ret = -EINVAL;
> +			goto free_q_arr;
>   		}
>   	}
>   	if (sdeb_zbc_model != BLK_ZONED_NONE) {
>