linux-kernel - [PATCH] drivers: mcb: fix resource leak in mcb

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Date:   Wed, 23 Nov 2022 19:32:21 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <morbidrsa@...il.com>
CC:     <gregkh@...uxfoundation.org>, <weiyongjun1@...wei.com>,
        <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH] drivers: mcb: fix resource leak in mcb_probe()

When probe hook function failed in mcb_probe(), it doesn't put the device.
Compiled test only.

Fixes: 7bc364097a89 ("mcb: Acquire reference to device in probe")
Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 drivers/mcb/mcb-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c
index 338fc889b357..b8ad4f16b4ac 100644
--- a/drivers/mcb/mcb-core.c
+++ b/drivers/mcb/mcb-core.c
@@ -71,8 +71,10 @@ static int mcb_probe(struct device *dev)
 
 	get_device(dev);
 	ret = mdrv->probe(mdev, found_id);
-	if (ret)
+	if (ret) {
 		module_put(carrier_mod);
+		put_device(dev);
+	}
 
 	return ret;
 }
-- 
2.17.1