linux-kernel - [UNTESTED PATCH] net/usb: kalmia: Fix uninit-value in kalmia_send_init

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Message-ID: <7266fe67c835f90e5c257129014a63e79e849ef9.camel@gmail.com>
Date:   Tue, 31 Jan 2023 12:14:54 +0100
From:   Miko Larsson <mikoxyzzz@...il.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [UNTESTED PATCH] net/usb: kalmia: Fix uninit-value in
 kalmia_send_init_packet

>From ef617d8df22945b871ab989e25c07d7c60ae21f6 Mon Sep 17 00:00:00 2001
From: Miko Larsson <mikoxyzzz@...il.com>
Date: Tue, 31 Jan 2023 11:01:20 +0100
Subject: [UNTESTED PATCH] net/usb: kalmia: Fix uninit-value in kalmia_send_init_packet

syzbot reports that act_len in kalmia_send_init_packet() is
uninitialized. Attempt to fix this by initializing it to 0.

Fixes: d40261236e8e ("net/usb: Add Samsung Kalmia driver for Samsung GT-B3730")
Reported-by: syzbot+cd80c5ef5121bfe85b55@...kaller.appspotmail.com
Signed-off-by: Miko Larsson <mikoxyzzz@...il.com>
---
 drivers/net/usb/kalmia.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/kalmia.c b/drivers/net/usb/kalmia.c
index 9f2b70ef39aa..b158fb7bf66a 100644
--- a/drivers/net/usb/kalmia.c
+++ b/drivers/net/usb/kalmia.c
@@ -56,7 +56,7 @@ static int
 kalmia_send_init_packet(struct usbnet *dev, u8 *init_msg, u8 init_msg_len,
 	u8 *buffer, u8 expected_len)
 {
-	int act_len;
+	int act_len = 0;
 	int status;
 
 	netdev_dbg(dev->net, "Sending init packet");
-- 
2.39.1