This is a note to let you know that I've just added the patch titled
[media] usbvision: fix crash on detecting device with invalid configuration
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usbvision-fix-crash-on-detecting-device-with-invalid-configuration.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fa52bd506f274b7619955917abfde355e3d19ffe Mon Sep 17 00:00:00 2001
From: Vladis Dronov <vdronov@xxxxxxxxxx>
Date: Mon, 16 Nov 2015 15:55:11 -0200
Subject: [media] usbvision: fix crash on detecting device with invalid configuration
From: Vladis Dronov <vdronov@xxxxxxxxxx>
commit fa52bd506f274b7619955917abfde355e3d19ffe upstream.
The usbvision driver crashes when a specially crafted usb device with invalid
number of interfaces or endpoints is detected. This fix adds checks that the
device has proper configuration expected by the driver.
Reported-by: Ralf Spenneberg <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Vladis Dronov <vdronov@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/usb/usbvision/usbvision-video.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
--- a/drivers/media/usb/usbvision/usbvision-video.c
+++ b/drivers/media/usb/usbvision/usbvision-video.c
@@ -1470,9 +1470,23 @@ static int usbvision_probe(struct usb_in
if (usbvision_device_data[model].interface >= 0)
interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
- else
+ else if (ifnum < dev->actconfig->desc.bNumInterfaces)
interface = &dev->actconfig->interface[ifnum]->altsetting[0];
+ else {
+ dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
+ ifnum, dev->actconfig->desc.bNumInterfaces - 1);
+ ret = -ENODEV;
+ goto err_usb;
+ }
+
+ if (interface->desc.bNumEndpoints < 2) {
+ dev_err(&intf->dev, "interface %d has %d endpoints, but must"
+ " have minimum 2\n", ifnum, interface->desc.bNumEndpoints);
+ ret = -ENODEV;
+ goto err_usb;
+ }
endpoint = &interface->endpoint[1].desc;
+
if (!usb_endpoint_xfer_isoc(endpoint)) {
dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
__func__, ifnum);
Patches currently in stable-queue which might be from vdronov@xxxxxxxxxx are
queue-4.4/usbvision-fix-overflow-of-interfaces-array.patch
queue-4.4/usbvision-fix-crash-on-detecting-device-with-invalid-configuration.patch
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