linux-kernel - [PATCH] sh: sh4: Fix reference count leak in sq_dev

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Date:   Sat, 25 Jul 2020 08:17:26 +0800
From:   Yi Wang <wang.yi59@....com.cn>
To:     ysato@...rs.sourceforge.jp
Cc:     dalias@...c.org, akpm@...ux-foundation.org, peterz@...radead.org,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org,
        xue.zhihong@....com.cn, wang.yi59@....com.cn,
        wang.liang82@....com.cn, Liao Pingfang <liao.pingfang@....com.cn>
Subject: [PATCH] sh: sh4: Fix reference count leak in sq_dev_add

From: Liao Pingfang <liao.pingfang@....com.cn>

kobject_init_and_add() takes reference even when it fails. If this
function returns an error, kobject_put() must be called to properly
clean up the memory associated with the object.

Signed-off-by: Liao Pingfang <liao.pingfang@....com.cn>
Signed-off-by: Yi Wang <wang.yi59@....com.cn>
---
 arch/sh/kernel/cpu/sh4/sq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index d432164..3fbd6fd 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -350,6 +350,8 @@ static int sq_dev_add(struct device *dev, struct subsys_interface *sif)
 				     "%s", "sq");
 	if (!error)
 		kobject_uevent(kobj, KOBJ_ADD);
+	else
+		kobject_put(kobj);
 	return error;
 }
 
-- 
2.9.5