linux-kernel - Re: [PATCH] iio: imu: adis16400: fix memory leak

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Date:   Thu, 19 Sep 2019 06:52:36 +0000
From:   "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
To:     "navid.emamdoost@...il.com" <navid.emamdoost@...il.com>
CC:     "Popa, Stefan Serban" <StefanSerban.Popa@...log.com>,
        "emamd001@....edu" <emamd001@....edu>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "knaack.h@....de" <knaack.h@....de>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "smccaman@....edu" <smccaman@....edu>,
        "kjlu@....edu" <kjlu@....edu>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>
Subject: Re: [PATCH] iio: imu: adis16400: fix memory leak

On Wed, 2019-09-18 at 12:03 -0500, Navid Emamdoost wrote:
> [External]
> 

Hey,

Thanks for this patch as well.
Comments inline here as well.

> In adis_update_scan_mode_burst, if adis->buffer allocation fails release
> the adis->xfer.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
> ---
>  drivers/iio/imu/adis_buffer.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/imu/adis_buffer.c
> b/drivers/iio/imu/adis_buffer.c
> index 9ac8356d9a95..1dbe25572a39 100644
> --- a/drivers/iio/imu/adis_buffer.c
> +++ b/drivers/iio/imu/adis_buffer.c
> @@ -35,8 +35,10 @@ static int adis_update_scan_mode_burst(struct iio_dev
> *indio_dev,
>  		return -ENOMEM;
>  
>  	adis->buffer = kzalloc(burst_length + sizeof(u16), GFP_KERNEL);
> -	if (!adis->buffer)
> +	if (!adis->buffer) {
> +		kfree(adis->xfer);

Same as the other patch: it would be a good idea to do "adis->xfer = NULL"
here.

>  		return -ENOMEM;
> +	}
>  
>  	tx = adis->buffer + burst_length;
>  	tx[0] = ADIS_READ_REG(adis->burst->reg_cmd);