Commit 9446edb9 authored Sep 11, 2013 by Kees Cook Committed by Jiri Kosina Sep 13, 2013

HID: sony: validate HID output report details



This driver must validate the availability of the HID output report and
its size before it can write LED states via buzz_set_leds(). This stops
a heap overflow that is possible if a device provides a malicious HID
output report:

[  108.171280] usb 1-1: New USB device found, idVendor=054c, idProduct=0002
...
[  117.507877] BUG kmalloc-192 (Not tainted): Redzone overwritten

CVE-2013-2890

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org #3.11
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent 78214e81

drivers/hid/hid-sony.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -537,6 +537,10 @@ static int buzz_init(struct hid_device *hdev)
		drv_data = hid_get_drvdata(hdev);
		BUG_ON(!(drv_data->quirks & BUZZ_CONTROLLER));

		/* Validate expected report characteristics. */
		if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 7))
		return -ENODEV;

		buzz = kzalloc(sizeof(*buzz), GFP_KERNEL);
		if (!buzz) {
		hid_err(hdev, "Insufficient memory, cannot allocate driver data\n");