net: kalmia: fix memory leaks

BugLink: https://bugs.launchpad.net/bugs/1843463
[ Upstream commit f1472cb09f11ddb41d4be84f0650835cb65a9073 ]

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/net/usb/kalmia.c b/drivers/net/usb/kalmia.c
index ce0b0b4e3a57c49b3ea72cec38e46547a39d6a9e..c677ec2bae183b08995a8174d89303dd1923358a 100644 (file)
--- a/drivers/net/usb/kalmia.c
+++ b/drivers/net/usb/kalmia.c
@@ -117,16 +117,16 @@ kalmia_init_and_get_ethernet_addr(struct usbnet *dev, u8 *ethernet_addr)
        status = kalmia_send_init_packet(dev, usb_buf, sizeof(init_msg_1)
                / sizeof(init_msg_1[0]), 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, sizeof(init_msg_2)
                / sizeof(init_msg_2[0]), usb_buf, 28);
        if (status != 0)
-               return status;
+               goto out;
 
        memcpy(ethernet_addr, usb_buf + 10, ETH_ALEN);
-
+out:
        kfree(usb_buf);
        return status;
 }