Thread (29 messages) 29 messages, 1 author, 2019-08-29
STALE2465d

[PATCH AUTOSEL 5.2 41/76] cx82310_eth: fix a memory leak bug

From: Sasha Levin <sashal@kernel.org>
Date: 2019-08-29 18:30:03
Also in: linux-usb, lkml, stable
Subsystem: networking drivers, the rest, usb networking drivers · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

From: Wenwen Wang <redacted>

[ 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 <redacted>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.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 5519248a791eb..32b08b18e1208 100644
--- a/drivers/net/usb/cx82310_eth.c
+++ b/drivers/net/usb/cx82310_eth.c
@@ -163,7 +163,8 @@ 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
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