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

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Message-ID: <YwhlMEYlNdevCPQU@kernel.org>
Date:   Fri, 26 Aug 2022 09:16:16 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
        Paul Moore <paul@...l-moore.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>, keyrings@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH] security: move from strlcpy with unused retval to strscpy

On Thu, Aug 18, 2022 at 11:02:31PM +0200, Wolfram Sang wrote:
> 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://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
>  security/keys/request_key_auth.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
> index 41e9735006d0..8f33cd170e42 100644
> --- a/security/keys/request_key_auth.c
> +++ b/security/keys/request_key_auth.c
> @@ -178,7 +178,7 @@ struct key *request_key_auth_new(struct key *target, const char *op,
>  	if (!rka->callout_info)
>  		goto error_free_rka;
>  	rka->callout_len = callout_len;
> -	strlcpy(rka->op, op, sizeof(rka->op));
> +	strscpy(rka->op, op, sizeof(rka->op));
>  
>  	/* see if the calling process is already servicing the key request of
>  	 * another process */
> -- 
> 2.35.1
> 


Acked-by: Jarkko Sakkinen <jarkko@...nel.org>

BR, Jarkko