netdev - [PATCH 1/1] ax88172a: fix ax88172a

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Message-Id: <1594641537-1288-1-git-send-email-george.kennedy@oracle.com>
Date:   Mon, 13 Jul 2020 07:58:57 -0400
From:   George Kennedy <george.kennedy@...cle.com>
To:     george.kennedy@...cle.com, davem@...emloft.net, kuba@...nel.org,
        dan.carpenter@...cle.com, dhaval.giani@...cle.com,
        netdev@...r.kernel.org
Subject: [PATCH 1/1] ax88172a: fix ax88172a_unbind() failures

If ax88172a_unbind() fails, make sure that the return code is
less than zero so that cleanup is done properly and avoid UAF.

Signed-off-by: George Kennedy <george.kennedy@...cle.com>
Reported-by: syzbot+4cd84f527bf4a10fc9c1@...kaller.appspotmail.com
---
 drivers/net/usb/ax88172a.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c
index 4e514f5..fd9faf2 100644
--- a/drivers/net/usb/ax88172a.c
+++ b/drivers/net/usb/ax88172a.c
@@ -237,6 +237,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
 
 free:
 	kfree(priv);
+	if (ret >= 0)
+		ret = -EIO;
 	return ret;
 }
 
-- 
1.8.3.1