linux-kernel - Re: [PATCH] acpi: Check if @id is NULL in acpi_table

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Date:	Mon, 06 Jan 2014 12:49:11 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	rjw@...k.pl, lenb@...nel.org, toshi.kani@...com,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] acpi: Check if @id is NULL in acpi_table_parse()

On Monday, January 06, 2014 04:43:54 PM Tang Chen wrote:
> strncmp() does not check if the params are NULL. In acpi_table_parse(),
> if @id is NULL, the kernel will panic.
> 
> Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
> Acked-by: Toshi Kani <toshi.kani@...com>

Queued up for 3.14 (but please use the e-mail address from MAINTAINERS next
time).  Thanks!

> ---
>  drivers/acpi/tables.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
> index d67a1fe..5a5263b 100644
> --- a/drivers/acpi/tables.c
> +++ b/drivers/acpi/tables.c
> @@ -293,7 +293,7 @@ int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
>  	if (acpi_disabled)
>  		return -ENODEV;
>  
> -	if (!handler)
> +	if (!id || !handler)
>  		return -EINVAL;
>  
>  	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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