lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Tue, 9 Oct 2018 17:37:15 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     jdelvare@...e.com, afd@...com, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] hwmon: (ina3221) Validate shunt resistor value from DT

On Mon, Oct 08, 2018 at 02:24:51PM -0700, Nicolin Chen wrote:
> The input->shunt_resistor is int type while the value from DT is
> unsigned int. Meanwhile, a divide-by-zero error would happen if
> the value is 0. So this patch just simply validates the value.
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka@...il.com>

Applied.

Thanks,
Guenter

> ---
> Changelog
> v1->v2:
>  * Validate the value and error out
> 
>  drivers/hwmon/ina3221.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
> index c3a497aed345..4f3ed24efe8e 100644
> --- a/drivers/hwmon/ina3221.c
> +++ b/drivers/hwmon/ina3221.c
> @@ -536,8 +536,14 @@ static int ina3221_probe_child_from_dt(struct device *dev,
>  	of_property_read_string(child, "label", &input->label);
>  
>  	/* Overwrite default shunt resistor value optionally */
> -	if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val))
> +	if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val)) {
> +		if (val < 1 || val > INT_MAX) {
> +			dev_err(dev, "invalid shunt resistor value %u of %s\n",
> +				val, child->name);
> +			return -EINVAL;
> +		}
>  		input->shunt_resistor = val;
> +	}
>  
>  	return 0;
>  }

Powered by blists - more mailing lists