linux-kernel - Re: [PATCH] power: supply: Fix refcount leak in rk817_charger

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Message-ID: <638642f3.050a0220.8b7f1.d555@mx.google.com>
Date:   Tue, 29 Nov 2022 11:35:45 -0600
From:   Chris Morgan <macroalpha82@...il.com>
To:     Qiheng Lin <linqiheng@...wei.com>
Cc:     sre@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: supply: Fix refcount leak in rk817_charger_probe

On Mon, Nov 28, 2022 at 10:27:40PM +0800, Qiheng Lin wrote:
> of_get_child_by_name() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when not need anymore.
> Add missing of_node_put() to avoid refcount leak.
> 
> Fixes: 11cb8da0189b ("power: supply: Add charger driver for Rockchip RK817")
> Signed-off-by: Qiheng Lin <linqiheng@...wei.com>

Good catch, thank you!

Reviewed-by: Chris Morgan <macromorgan@...mail.com>

> ---
>  drivers/power/supply/rk817_charger.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/rk817_charger.c b/drivers/power/supply/rk817_charger.c
> index 635f051b0821..d25a81d79fac 100644
> --- a/drivers/power/supply/rk817_charger.c
> +++ b/drivers/power/supply/rk817_charger.c
> @@ -1060,8 +1060,10 @@ static int rk817_charger_probe(struct platform_device *pdev)
>  		return -ENODEV;
> 
>  	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
> -	if (!charger)
> +	if (!charger) {
> +		of_node_put(node);
>  		return -ENOMEM;
> +	}
> 
>  	charger->rk808 = rk808;
> 
> --
> 2.32.0
>