linux-kernel - Re: [PATCH] xen: move from strlcpy with unused retval to strscpy

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Date:   Tue, 23 Aug 2022 13:46:43 +0000
From:   Oleksandr Tyshchenko <Oleksandr_Tyshchenko@...m.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] xen: move from strlcpy with unused retval to strscpy


On 19.08.22 00:01, Wolfram Sang wrote:


Hello Wolfram

> Follow the advice of the below link and prefer 'strscpy' in this
> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.
>
> Link: https://urldefense.com/v3/__https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/__;!!GF_29dbcQIUBPA!x8tXRXTdzbSmaWA3GH-Aj-ZF2HrMIAVOr_qerO6avg05AKhT0RI7MnqV64DykFFHfuDwoDYtT-i5bw7nGYSpneDqzzGfhYFHcm7LBQ$  [lore[.]kernel[.]org]
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>


Looks correct:

Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>


> ---
>   drivers/xen/xen-scsiback.c                 | 2 +-
>   drivers/xen/xenbus/xenbus_probe_frontend.c | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
> index 7a0c93acc2c5..d3dcda344989 100644
> --- a/drivers/xen/xen-scsiback.c
> +++ b/drivers/xen/xen-scsiback.c
> @@ -1121,7 +1121,7 @@ static void scsiback_do_1lun_hotplug(struct vscsibk_info *info, int op,
>   				"%s: writing %s", __func__, state);
>   		return;
>   	}
> -	strlcpy(phy, val, VSCSI_NAMELEN);
> +	strscpy(phy, val, VSCSI_NAMELEN);
>   	kfree(val);
>   
>   	/* virtual SCSI device */
> diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c
> index 07b010a68fcf..f44d5a64351e 100644
> --- a/drivers/xen/xenbus/xenbus_probe_frontend.c
> +++ b/drivers/xen/xenbus/xenbus_probe_frontend.c
> @@ -40,7 +40,7 @@ static int frontend_bus_id(char bus_id[XEN_BUS_ID_SIZE], const char *nodename)
>   		return -EINVAL;
>   	}
>   
> -	strlcpy(bus_id, nodename + 1, XEN_BUS_ID_SIZE);
> +	strscpy(bus_id, nodename + 1, XEN_BUS_ID_SIZE);
>   	if (!strchr(bus_id, '/')) {
>   		pr_warn("bus_id %s no slash\n", bus_id);
>   		return -EINVAL;

-- 
Regards,

Oleksandr Tyshchenko