linux-kernel - Re: [PATCH v2] clk/ti/adpll: allocate room for terminating null

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Message-ID: <8e45c174b787a26eb60762b8ca2e4747@sk2.org>
Date:   Fri, 27 Sep 2019 20:18:37 +0200
From:   Stephen Kitt <steve@....org>
To:     Tero Kristo <t-kristo@...com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-omap@...r.kernel.org,
        linux-clk@...r.kernel.org, Tony Lindgren <tony@...mide.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] clk/ti/adpll: allocate room for terminating null

Le 27/09/2019 20:05, Stephen Kitt a écrit :
> The buffer allocated in ti_adpll_clk_get_name doesn't account for the
> terminating null. This patch switches to ka_sprintf to avoid

Aargh, devm_kasprintf of course...

> overflowing.
> 
> Signed-off-by: Stephen Kitt <steve@....org>
> ---
>  drivers/clk/ti/adpll.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/clk/ti/adpll.c b/drivers/clk/ti/adpll.c
> index fdfb90058504..021cf9e2b4db 100644
> --- a/drivers/clk/ti/adpll.c
> +++ b/drivers/clk/ti/adpll.c
> @@ -195,14 +195,8 @@ static const char *ti_adpll_clk_get_name(struct
> ti_adpll_data *d,
>  			return NULL;
>  	} else {
>  		const char *base_name = "adpll";
> -		char *buf;
> -
> -		buf = devm_kzalloc(d->dev, 8 + 1 + strlen(base_name) + 1 +
> -				    strlen(postfix), GFP_KERNEL);
> -		if (!buf)
> -			return NULL;
> -		sprintf(buf, "%08lx.%s.%s", d->pa, base_name, postfix);
> -		name = buf;
> +		name = devm_kasprintf(d->dev, GFP_KERNEL, "%08lx.%s.%s",
> +				      d->pa, base_name, postfix);
>  	}
> 
>  	return name;