patch "USB: idmouse: fix interface sanity checks" added to usb-linus

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

USB: idmouse: fix interface sanity checks

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 59920635b89d74b9207ea803d5e91498d39e8b69 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Tue, 10 Dec 2019 12:26:00 +0100
Subject: USB: idmouse: fix interface sanity checks

Make sure to use the current alternate setting when verifying the interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN() in usb_submit_urb() that kernels with panic_on_warn set would choke on.

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

index 4afb5ddfd361..e9437a176518 100644
@@ -322,7 +322,7 @@ static int idmouse_probe(struct usb_interface *interface,
 	int result;
 
 	/* check if we have gotten the data or the hid interface */
-	iface_desc = &interface->altsetting[0];
+	iface_desc = interface->cur_altsetting;
 	if (iface_desc->desc.bInterfaceClass != 0x0A)
 		return -ENODEV;
 

2.24.0