This is a note to let you know that I've just added the patch titled
[media] usbvision fix overflow of interfaces array
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: usbvision-fix-overflow-of-interfaces-array.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@vger.kernel.org know about it.
From 588afcc1c0e45358159090d95bf7b246fb67565f Mon Sep 17 00:00:00 2001
From: Oliver Neukum oneukum@suse.com Date: Tue, 27 Oct 2015 09:51:34 -0200 Subject: [media] usbvision fix overflow of interfaces array
From: Oliver Neukum oneukum@suse.com
commit 588afcc1c0e45358159090d95bf7b246fb67565f upstream.
This fixes the crash reported in: http://seclists.org/bugtraq/2015/Oct/35 The interface number needs a sanity check.
Signed-off-by: Oliver Neukum oneukum@suse.com Cc: Vladis Dronov vdronov@redhat.com Signed-off-by: Hans Verkuil hans.verkuil@cisco.com Signed-off-by: Mauro Carvalho Chehab mchehab@osg.samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/usb/usbvision/usbvision-video.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/media/usb/usbvision/usbvision-video.c +++ b/drivers/media/usb/usbvision/usbvision-video.c @@ -1461,6 +1461,13 @@ static int usbvision_probe(struct usb_in printk(KERN_INFO "%s: %s found\n", __func__, usbvision_device_data[model].model_string);
+ /* + * this is a security check. + * an exploit using an incorrect bInterfaceNumber is known + */ + if (ifnum >= USB_MAXINTERFACES || !dev->actconfig->interface[ifnum]) + return -ENODEV; + if (usbvision_device_data[model].interface >= 0) interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0]; else if (ifnum < dev->actconfig->desc.bNumInterfaces)
Patches currently in stable-queue which might be from oneukum@suse.com are
queue-4.4/lan78xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.4/cx82310_eth-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.4/r8152-fix-the-wake-event.patch queue-4.4/sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.4/r8152-adjust-aldps-function.patch queue-4.4/smsc75xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.4/usbvision-fix-overflow-of-interfaces-array.patch queue-4.4/r8152-use-test_and_clear_bit.patch queue-4.4/usb-musb-ux500-fix-null-pointer-dereference-at-system-pm.patch