linux-kernel - Re: [PATCH] mips: cdmm: Fix refcount leak in mips_cdmm_phys

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Message-ID: <20220311142926.czypl55ni6wpqpjm@mobilestation>
Date:   Fri, 11 Mar 2022 17:29:26 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Miaoqian Lin <linmq006@...il.com>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mips: cdmm: Fix refcount leak in mips_cdmm_phys_base

On Wed, Mar 09, 2022 at 09:17:10AM +0000, Miaoqian Lin wrote:
> The of_find_compatible_node() function returns a node pointer with
> refcount incremented, We should use of_node_put() on it when done
> Add the missing of_node_put() to release the refcount.
> 
> Fixes: 2121aa3e2312 ("mips: cdmm: Add mti,mips-cdmm dtb node support")

Nice catch. Thanks.

Acked-by: Serge Semin <fancer.lancer@...il.com>

> Signed-off-by: Miaoqian Lin <linmq006@...il.com>
> ---
>  drivers/bus/mips_cdmm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
> index 626dedd110cb..fca0d0669aa9 100644
> --- a/drivers/bus/mips_cdmm.c
> +++ b/drivers/bus/mips_cdmm.c
> @@ -351,6 +351,7 @@ phys_addr_t __weak mips_cdmm_phys_base(void)
>  	np = of_find_compatible_node(NULL, NULL, "mti,mips-cdmm");
>  	if (np) {
>  		err = of_address_to_resource(np, 0, &res);
> +		of_node_put(np);
>  		if (!err)
>  			return res.start;
>  	}
> -- 
> 2.17.1
>