linux-kernel - [PATCH] libertas: Fix possible refcount leak in if_usb

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Message-Id: <20220620092350.39960-1-hbh25y@gmail.com>
Date:   Mon, 20 Jun 2022 17:23:50 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     kvalo@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, wanghai38@...wei.com,
        dsd@...top.org, linville@...driver.com, dcbw@...hat.com
Cc:     libertas-dev@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] libertas: Fix possible refcount leak in if_usb_probe()

usb_get_dev will be called before lbs_get_firmware_async which means that
usb_put_dev need to be called when lbs_get_firmware_async fails.

Fixes: ce84bb69f50e ("libertas USB: convert to asynchronous firmware loading")
Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 drivers/net/wireless/marvell/libertas/if_usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/marvell/libertas/if_usb.c b/drivers/net/wireless/marvell/libertas/if_usb.c
index 5d6dc1dd050d..32fdc4150b60 100644
--- a/drivers/net/wireless/marvell/libertas/if_usb.c
+++ b/drivers/net/wireless/marvell/libertas/if_usb.c
@@ -287,6 +287,7 @@ static int if_usb_probe(struct usb_interface *intf,
 	return 0;
 
 err_get_fw:
+	usb_put_dev(udev);
 	lbs_remove_card(priv);
 err_add_card:
 	if_usb_reset_device(cardp);
-- 
2.25.1