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

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Message-ID: <20230711020752.2344-1-yangrong@vivo.com>
Date:   Tue, 11 Jul 2023 10:03:10 +0800
From:   Yang Rong <yangrong@...o.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        linux-mtd@...ts.infradead.org (open list:MEMORY TECHNOLOGY DEVICES
        (MTD)), linux-kernel@...r.kernel.org (open list)
Cc:     opensource.kernel@...o.com, luhongfei@...o.com,
        Yang Rong <yangrong@...o.com>
Subject: [PATCH v3] mtd: core: Fix resource leak in a for_each_child_of_node() loop

Ensure child node references are properly decremented in the error path
  of this function implementation.

Fixes: 2df11f00100d ("mtd: core: try to find OF node for every MTD partition")
Signed-off-by: Yang Rong <yangrong@...o.com>
---
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;
 		}
 	}
-- 
2.35.3