patch "usb: core: config: fix validation of wMaxPacketValue entries" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: core: config: fix validation of wMaxPacketValue entries

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 Mon Sep 17 00:00:00 2001
From: Pavel Hofman <[email protected]>
Date: Fri, 10 Dec 2021 09:52:18 +0100
Subject: usb: core: config: fix validation of wMaxPacketValue entries

The checks performed by commit aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors") require that initial value of the maxp variable contains both maximum packet size bits (10..0) and multiple-transactions bits (12..11). However, the existing code assings only the maximum packet size bits. This patch assigns all bits of wMaxPacketSize to the variable.

---
 drivers/usb/core/config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 16b1fd9dc60c..e3c3a73e1ed8 100644
@@ -406,7 +406,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno,
 	 * the USB-2 spec requires such endpoints to have wMaxPacketSize = 0
 	 * (see the end of section 5.6.3), so don't warn about them.
 	 */
-	maxp = usb_endpoint_maxp(&endpoint->desc);
+	maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize);
 	if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) {
 		dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n",
 		    cfgno, inum, asnum, d->bEndpointAddress);

2.34.1