linux-kernel - Re: [PATCH 5/6] acpi: Check if @id is NULL in acpi_table

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Date:	Mon, 19 Aug 2013 13:29:03 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	lenb@...nel.org, rjw@...k.pl, liwanp@...ux.vnet.ibm.com,
	tj@...nel.org, akpm@...ux-foundation.org, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 5/6] acpi: Check if @id is NULL in acpi_table_parse()

On Fri, 2013-08-16 at 15:06 +0800, 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>

-Toshi


> ---
>  drivers/acpi/tables.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> 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)


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