linux-kernel - [PATCH 5.4 09/51] usbnet: fix error return code in usbnet

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Date:   Mon,  1 Nov 2021 10:17:13 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Wang Hai <wanghai38@...wei.com>,
        Johan Hovold <johan@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.4 09/51] usbnet: fix error return code in usbnet_probe()

From: Wang Hai <wanghai38@...wei.com>

commit 6f7c88691191e6c52ef2543d6f1da8d360b27a24 upstream.

Return error code if usb_maxpacket() returns 0 in usbnet_probe()

Fixes: 397430b50a36 ("usbnet: sanity check for maxpacket")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
Reviewed-by: Johan Hovold <johan@...nel.org>
Link: https://lore.kernel.org/r/20211026124015.3025136-1-wanghai38@huawei.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/usbnet.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1775,6 +1775,7 @@ usbnet_probe (struct usb_interface *udev
 	dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
 	if (dev->maxpacket == 0) {
 		/* that is a broken device */
+		status = -ENODEV;
 		goto out4;
 	}