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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191015202020.29114-1-vvidic@valentin-vidic.from.hr>
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