linux-kernel - Re: [Patch] iio: accel: bma400: Fix memory leak in bma400_get_steps

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Date:   Fri, 11 Nov 2022 23:12:32 +0530
From:   Jagath Jog J <jagathjog1996@...il.com>
To:     Dong Chenchen <dongchenchen2@...wei.com>
Cc:     dan@...obertson.com, jic23@...nel.org, lars@...afoo.de,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        yuehaibing@...wei.com
Subject: Re: [Patch] iio: accel: bma400: Fix memory leak in bma400_get_steps_reg()

On Thu, Nov 10, 2022 at 6:37 AM Dong Chenchen <dongchenchen2@...wei.com> wrote:
>
> When regmap_bulk_read() fails, it does not free steps_raw,
> which will cause a memory leak issue, this patch fixes it.
>
> Fixes: d221de60eee3 ("iio: accel: bma400: Add separate channel for step counter")
> Signed-off-by: Dong Chenchen <dongchenchen2@...wei.com>

Reviewed-by: Jagath Jog J <jagathjog1996@...il.com>

Thanks for catching this

Regards,
Jagath

> ---
>  drivers/iio/accel/bma400_core.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
> index ad8fce3e08cd..43976cf5a91b 100644
> --- a/drivers/iio/accel/bma400_core.c
> +++ b/drivers/iio/accel/bma400_core.c
> @@ -805,8 +805,10 @@ static int bma400_get_steps_reg(struct bma400_data *data, int *val)
>
>         ret = regmap_bulk_read(data->regmap, BMA400_STEP_CNT0_REG,
>                                steps_raw, BMA400_STEP_RAW_LEN);
> -       if (ret)
> +       if (ret) {
> +               kfree(steps_raw);
>                 return ret;
> +       }
>         *val = get_unaligned_le24(steps_raw);
>         kfree(steps_raw);
>         return IIO_VAL_INT;
> --
> 2.25.1
>