From 3c11c4bed02b202e278c0f5c319ae435d7fb9815 Mon Sep 17 00:00:00 2001

From: Johan Hovold <johan@kernel.org>

Date: Tue, 10 Dec 2019 12:25:59 +0100

Subject: [PATCH] USB: adutux: fix interface sanity check

Git-commit: 3c11c4bed02b202e278c0f5c319ae435d7fb9815

Patch-mainline: v5.5-rc2

References: bsc#1051510

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.

Fixes: 03270634e242 ("USB: Add ADU support for Ontrak ADU devices")

Cc: stable <stable@vger.kernel.org>     # 2.6.19

Signed-off-by: Johan Hovold <johan@kernel.org>

Link: https://lore.kernel.org/r/20191210112601.3561-3-johan@kernel.org

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-by: Takashi Iwai <tiwai@suse.de>

---

 drivers/usb/misc/adutux.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c

index 6f5edb9fc61e..d8d157c4c271 100644

--- a/drivers/usb/misc/adutux.c

+++ b/drivers/usb/misc/adutux.c

@@ -669,7 +669,7 @@ static int adu_probe(struct usb_interface *interface,

 	init_waitqueue_head(&dev->read_wait);

 	init_waitqueue_head(&dev->write_wait);

-	res = usb_find_common_endpoints_reverse(&interface->altsetting[0],

+	res = usb_find_common_endpoints_reverse(interface->cur_altsetting,

 			NULL, NULL,

 			&dev->interrupt_in_endpoint,

 			&dev->interrupt_out_endpoint);

-- 

2.16.4