netdev - [PATCH] net: usb: sr9800: fix uninitialized local variable

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Date:   Tue, 15 Oct 2019 22:20:20 +0200
From:   Valentin Vidic <vvidic@...entin-vidic.from.hr>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Chuhong Yuan <hslester96@...il.com>, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Valentin Vidic <vvidic@...entin-vidic.from.hr>,
        syzbot+f1842130bbcfb335bac1@...kaller.appspotmail.com
Subject: [PATCH] net: usb: sr9800: fix uninitialized local variable

Make sure res does not contain random value if the call to
sr_read_cmd fails for some reason.

Reported-by: syzbot+f1842130bbcfb335bac1@...kaller.appspotmail.com
Signed-off-by: Valentin Vidic <vvidic@...entin-vidic.from.hr>
---
 drivers/net/usb/sr9800.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/sr9800.c b/drivers/net/usb/sr9800.c
index c5d4a0060124..681e0def6356 100644
--- a/drivers/net/usb/sr9800.c
+++ b/drivers/net/usb/sr9800.c
@@ -335,7 +335,7 @@ static void sr_set_multicast(struct net_device *net)
 static int sr_mdio_read(struct net_device *net, int phy_id, int loc)
 {
 	struct usbnet *dev = netdev_priv(net);
-	__le16 res;
+	__le16 res = 0;
 
 	mutex_lock(&dev->phy_mutex);
 	sr_set_sw_mii(dev);
-- 
2.20.1