linux-kernel - Re: [PATCH] iio: light: apds9306: Fix off by one in apds9306_sampling_freq

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Date: Fri, 5 Apr 2024 17:44:31 +1030
From: Subhajit Ghosh <subhajit.ghosh@...aklogic.com>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen
 <lars@...afoo.de>, linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] iio: light: apds9306: Fix off by one in
 apds9306_sampling_freq_get()

On 4/4/24 18:01, Dan Carpenter wrote:
> The > comparison needs to be >= to prevent an out of bounds access.
> 
> Fixes: 620d1e6c7a3f ("iio: light: Add support for APDS9306 Light Sensor")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
> ---
>   drivers/iio/light/apds9306.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/light/apds9306.c b/drivers/iio/light/apds9306.c
> index 4d8490602cd7..49fa6b7d5170 100644
> --- a/drivers/iio/light/apds9306.c
> +++ b/drivers/iio/light/apds9306.c
> @@ -635,7 +635,7 @@ static int apds9306_sampling_freq_get(struct apds9306_data *data, int *val,
>   	if (ret)
>   		return ret;
>   
> -	if (repeat_rate_idx > ARRAY_SIZE(apds9306_repeat_rate_freq))
> +	if (repeat_rate_idx >= ARRAY_SIZE(apds9306_repeat_rate_freq))
>   		return -EINVAL;
Good find.

Reviewed-by: Subhajit Ghosh <subhajit.ghosh@...aklogic.com>

Regards,
Subhajit Ghosh
>   
>   	*val = apds9306_repeat_rate_freq[repeat_rate_idx][0];