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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Miaoqian Lin <linmq006@gmail.com>,
        Helge Deller <deller@gmx.de>
Subject: [PATCH 4.19 221/239] parisc: pdc_stable: Fix memory leak in pdcs_register_pathentries
Date:   Mon, 24 Jan 2022 19:44:19 +0100
Message-Id: <20220124183950.132688245@linuxfoundation.org>
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From: Miaoqian Lin <linmq006@gmail.com>

commit d24846a4246b6e61ecbd036880a4adf61681d241 upstream.

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()：

   If this function returns an error, kobject_put() must be called to
   properly clean up the memory associated with the object.

Fix memory leak by calling kobject_put().

Fixes: 73f368cf679b ("Kobject: change drivers/parisc/pdc_stable.c to use kobject_init_and_add")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/parisc/pdc_stable.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/parisc/pdc_stable.c
+++ b/drivers/parisc/pdc_stable.c
@@ -992,8 +992,10 @@ pdcs_register_pathentries(void)
 		entry->kobj.kset = paths_kset;
 		err = kobject_init_and_add(&entry->kobj, &ktype_pdcspath, NULL,
 					   "%s", entry->name);
-		if (err)
+		if (err) {
+			kobject_put(&entry->kobj);
 			return err;
+		}
 
 		/* kobject is now registered */
 		write_lock(&entry->rw_lock);