[PATCH] net: kalmia: fix memory leaks

From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: "David S. Miller" <davem@davemloft.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Allison Randal <allison@lohutok.net>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-usb@vger.kernel.org (open list:USB NETWORKING DRIVERS),
	netdev@vger.kernel.org (open list:NETWORKING DRIVERS),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] net: kalmia: fix memory leaks
Date: Wed, 14 Aug 2019 13:56:43 -0500	[thread overview]
Message-ID: <1565809005-8437-1-git-send-email-wenwen@cs.uga.edu> (raw)

In kalmia_init_and_get_ethernet_addr(), 'usb_buf' is allocated through
kmalloc(). In the following execution, if the 'status' returned by
kalmia_send_init_packet() is not 0, 'usb_buf' is not deallocated, leading
to memory leaks. To fix this issue, add the 'out' label to free 'usb_buf'.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
 drivers/net/usb/kalmia.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/kalmia.c b/drivers/net/usb/kalmia.c
index d62b670..fc5895f 100644
--- a/drivers/net/usb/kalmia.c
+++ b/drivers/net/usb/kalmia.c
@@ -113,16 +113,16 @@ kalmia_init_and_get_ethernet_addr(struct usbnet *dev, u8 *ethernet_addr)
 	status = kalmia_send_init_packet(dev, usb_buf, ARRAY_SIZE(init_msg_1),
 					 usb_buf, 24);
 	if (status != 0)
-		return status;
+		goto out;
 
 	memcpy(usb_buf, init_msg_2, 12);
 	status = kalmia_send_init_packet(dev, usb_buf, ARRAY_SIZE(init_msg_2),
 					 usb_buf, 28);
 	if (status != 0)
-		return status;
+		goto out;
 
 	memcpy(ethernet_addr, usb_buf + 10, ETH_ALEN);
-
+out:
 	kfree(usb_buf);
 	return status;
 }
-- 
2.7.4

