linux-kernel - [PATCH AUTOSEL 5.4 2/2] mfd: dln2: Fix memory leak in dln2

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Message-Id: <20230510205026.105079-2-sashal@kernel.org>
Date:   Wed, 10 May 2023 16:50:26 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Qiang Ning <qning0106@....com>, Lee Jones <lee@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.4 2/2] mfd: dln2: Fix memory leak in dln2_probe()

From: Qiang Ning <qning0106@....com>

[ Upstream commit 96da8f148396329ba769246cb8ceaa35f1ddfc48 ]

When dln2_setup_rx_urbs() in dln2_probe() fails, error out_free forgets
to call usb_put_dev() to decrease the refcount of dln2->usb_dev.

Fix this by adding usb_put_dev() in the error handling code of
dln2_probe().

Signed-off-by: Qiang Ning <qning0106@....com>
Signed-off-by: Lee Jones <lee@...nel.org>
Link: https://lore.kernel.org/r/20230330024353.4503-1-qning0106@126.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mfd/dln2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/dln2.c b/drivers/mfd/dln2.c
index 707f4287ab4a0..80952237e4b43 100644
--- a/drivers/mfd/dln2.c
+++ b/drivers/mfd/dln2.c
@@ -797,6 +797,7 @@ static int dln2_probe(struct usb_interface *interface,
 	dln2_stop_rx_urbs(dln2);
 
 out_free:
+	usb_put_dev(dln2->usb_dev);
 	dln2_free(dln2);
 
 	return ret;
-- 
2.39.2