linux-kernel - [PATCH net] net: usb: rtl8150 fix unintiatilzed variables in rtl8150_get_link

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Message-ID: <20240619132816.11526-1-oneukum@suse.com>
Date: Wed, 19 Jun 2024 15:28:03 +0200
From: Oliver Neukum <oneukum@...e.com>
To: petkan@...leusys.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-usb@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>,
	syzbot+5186630949e3c55f0799@...kaller.appspotmail.com
Subject: [PATCH net] net: usb: rtl8150 fix unintiatilzed variables in rtl8150_get_link_ksettings

This functions retrieves values by passing a pointer. As the function
that retrieves them can fail before touching the pointers, the variables
must be initialized.

Reported-by: syzbot+5186630949e3c55f0799@...kaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@...e.com>
---
 drivers/net/usb/rtl8150.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
index 97afd7335d86..01a3b2417a54 100644
--- a/drivers/net/usb/rtl8150.c
+++ b/drivers/net/usb/rtl8150.c
@@ -778,7 +778,8 @@ static int rtl8150_get_link_ksettings(struct net_device *netdev,
 				      struct ethtool_link_ksettings *ecmd)
 {
 	rtl8150_t *dev = netdev_priv(netdev);
-	short lpa, bmcr;
+	short lpa = 0;
+	short bmcr = 0;
 	u32 supported;
 
 	supported = (SUPPORTED_10baseT_Half |
-- 
2.45.1