linux-kernel - [PATCH] ARM: mxs: fix memory leak in mxs_machine

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Date:   Thu, 17 Nov 2022 06:20:11 +0000
From:   Zheng Yongjun <zhengyongjun3@...wei.com>
To:     <shawnguo@...nel.org>, <s.hauer@...gutronix.de>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <kernel@...gutronix.de>, <festevam@...il.com>, <linux-imx@....com>
Subject: [PATCH] ARM: mxs: fix memory leak in mxs_machine_init()

If of_property_read_string() failed, 'soc_dev_attr' should be
freed before return. Otherwise there is a memory leak.

Fixes: 2046338dcbc6 ("ARM: mxs: Use soc bus infrastructure")
Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
---
 arch/arm/mach-mxs/mach-mxs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
index 25c9d184fa4c..1c57ac401649 100644
--- a/arch/arm/mach-mxs/mach-mxs.c
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -393,8 +393,10 @@ static void __init mxs_machine_init(void)

 	root = of_find_node_by_path("/");
 	ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
-	if (ret)
+	if (ret) {
+		kfree(soc_dev_attr);
 		return;
+	}

 	soc_dev_attr->family = "Freescale MXS Family";
 	soc_dev_attr->soc_id = mxs_get_soc_id();
--
2.17.1