From: Valentin Vidic <vvidic@valentin-vidic.from.hr>
Date: Tue, 15 Oct 2019 20:20:20 +0000 (+0200)
Subject: net: usb: sr9800: fix uninitialized local variable
X-Git-Tag: v4.9.199~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b6a353661f44bd53617d68f71b66a4b22e563649;p=platform%2Fkernel%2Flinux-amlogic.git

net: usb: sr9800: fix uninitialized local variable

commit 77b6d09f4ae66d42cd63b121af67780ae3d1a5e9 upstream.

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

Reported-by: syzbot+f1842130bbcfb335bac1@syzkaller.appspotmail.com
Signed-off-by: Valentin Vidic <vvidic@valentin-vidic.from.hr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/usb/sr9800.c b/drivers/net/usb/sr9800.c
index 004c955c1fd1..da0ae16f5c74 100644
--- a/drivers/net/usb/sr9800.c
+++ b/drivers/net/usb/sr9800.c
@@ -336,7 +336,7 @@ 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);