linux-kernel - [PATCH 4.9 08/26] cx82310_eth: fix a memory leak bug

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Message-Id: <20190908121100.249977437@linuxfoundation.org>
Date:   Sun,  8 Sep 2019 13:41:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wenwen Wang <wenwen@...uga.edu>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 08/26] cx82310_eth: fix a memory leak bug

[ Upstream commit 1eca92eef18719027d394bf1a2d276f43e7cf886 ]

In cx82310_bind(), 'dev->partial_data' is allocated through kmalloc().
Then, the execution waits for the firmware to become ready. If the firmware
is not ready in time, the execution is terminated. However, the allocated
'dev->partial_data' is not deallocated on this path, leading to a memory
leak bug. To fix this issue, free 'dev->partial_data' before returning the
error.

Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/usb/cx82310_eth.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/cx82310_eth.c b/drivers/net/usb/cx82310_eth.c
index 947bea81d9241..dfbdea22fbad9 100644
--- a/drivers/net/usb/cx82310_eth.c
+++ b/drivers/net/usb/cx82310_eth.c
@@ -175,7 +175,8 @@ static int cx82310_bind(struct usbnet *dev, struct usb_interface *intf)
 	}
 	if (!timeout) {
 		dev_err(&udev->dev, "firmware not ready in time\n");
-		return -ETIMEDOUT;
+		ret = -ETIMEDOUT;
+		goto err;
 	}
 
 	/* enable ethernet mode (?) */
-- 
2.20.1