linux-kernel - Re: [PATCH] remoteproc: k3-r5: Fix refcount leak in k3_r5_cluster_of

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Message-ID: <20220614225557.GB1236509@p14s>
Date:   Tue, 14 Jun 2022 16:55:57 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Miaoqian Lin <linmq006@...il.com>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Suman Anna <s-anna@...com>, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remoteproc: k3-r5: Fix refcount leak in
 k3_r5_cluster_of_init

On Sun, Jun 05, 2022 at 12:33:34PM +0400, Miaoqian Lin wrote:
> Every iteration of for_each_available_child_of_node() decrements
> the reference count of the previous node.
> When breaking early from a for_each_available_child_of_node() loop,
> we need to explicitly call of_node_put() on the child node.
> Add missing of_node_put() to avoid refcount leak.
> 
> Fixes: 6dedbd1d5443 ("remoteproc: k3-r5: Add a remoteproc driver for R5F subsystem")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>
> ---
>  drivers/remoteproc/ti_k3_r5_remoteproc.c | 2 ++
>  1 file changed, 2 insertions(+)

I have applied this patch.

Thanks,
Mathieu

> 
> diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> index 4840ad906018..0481926c6975 100644
> --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> @@ -1655,6 +1655,7 @@ static int k3_r5_cluster_of_init(struct platform_device *pdev)
>  		if (!cpdev) {
>  			ret = -ENODEV;
>  			dev_err(dev, "could not get R5 core platform device\n");
> +			of_node_put(child);
>  			goto fail;
>  		}
>  
> @@ -1663,6 +1664,7 @@ static int k3_r5_cluster_of_init(struct platform_device *pdev)
>  			dev_err(dev, "k3_r5_core_of_init failed, ret = %d\n",
>  				ret);
>  			put_device(&cpdev->dev);
> +			of_node_put(child);
>  			goto fail;
>  		}
>  
> -- 
> 2.25.1
>