linux-kernel - Re: [PATCH v3] mtd: core: Fix resource leak in a for_each_child_of

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Message-ID: <ffc8f6162a863179f88304ed8801d44f@milecki.pl>
Date:   Tue, 11 Jul 2023 18:37:42 +0200
From:   Rafał Miłecki <rafal@...ecki.pl>
To:     Yang Rong <yangrong@...o.com>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        opensource.kernel@...o.com, luhongfei@...o.com
Subject: Re: [PATCH v3] mtd: core: Fix resource leak in a
 for_each_child_of_node() loop

On 2023-07-11 04:03, Yang Rong wrote:
> Ensure child node references are properly decremented in the error path
>   of this function implementation.

Nitpicking: it's actually a /success/ code path that misses
of_node_put().


> Fixes: 2df11f00100d ("mtd: core: try to find OF node for every MTD 
> partition")
> Signed-off-by: Yang Rong <yangrong@...o.com>

Acked-by: Rafał Miłecki <rafal@...ecki.pl>


> ---
> v2: 
> https://lore.kernel.org/all/20230710061412.2272-1-yangrong@vivo.com/
> The modifications made copared to the previous version are as follows:
> 1.Optimized the expression of the Subject, making it more accurate.
> 2.Optimized the content of the commit message.
> 3.Add the tag "Fixes".
> 
>  drivers/mtd/mtdcore.c | 1 +
>  1 file changed, 1 insertion(+)
>  mode change 100644 => 100755 drivers/mtd/mtdcore.c
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index e00b12aa5ec9..b02cb8b1a38d
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -591,6 +591,7 @@ static void mtd_check_of_node(struct mtd_info *mtd)
>  		if (plen == mtd_name_len &&
>  		    !strncmp(mtd->name, pname + offset, plen)) {
>  			mtd_set_of_node(mtd, mtd_dn);
> +			of_node_put(mtd_dn);
>  			break;
>  		}
>  	}