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From: Yang Yingliang <yangyingliang@huawei.com>
To: <ntb@lists.linux.dev>
Cc: <jdmason@kudzu.us>, <dave.jiang@intel.com>, <allenbh@gmail.com>,
	<yangyingliang@huawei.com>
Subject: [PATCH] NTB: ntb_transport: fix possible memory leak while device_register() fails
Date: Thu, 10 Nov 2022 23:19:17 +0800	[thread overview]
Message-ID: <20221110151917.399214-1-yangyingliang@huawei.com> (raw)

If device_register() returns error, the name allocated by
dev_set_name() need be freed. As comment of device_register()
says, it should use put_device() to give up the reference in
the error path. So fix this by calling put_device(), then the
name can be freed in kobject_cleanup(), and client_dev is freed
in ntb_transport_client_release().

Fixes: fce8a7bb5b4b ("PCI-Express Non-Transparent Bridge Support")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/ntb/ntb_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index a9b97ebc71ac..2abd2235bbca 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -410,7 +410,7 @@ int ntb_transport_register_client_dev(char *device_name)
 
 		rc = device_register(dev);
 		if (rc) {
-			kfree(client_dev);
+			put_device(dev);
 			goto err;
 		}
 
-- 
2.25.1


             reply	other threads:[~2022-11-10 15:20 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-10 15:19 Yang Yingliang [this message]
2022-11-10 15:33 ` [PATCH] NTB: ntb_transport: fix possible memory leak while device_register() fails Dave Jiang

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