On Wed, Sep 11, 2013 at 3:56 PM, Benjamin Tissoires
<benjamin.tissoires@xxxxxxxxxx> wrote:
> From: Kees Cook <keescook@xxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
As far as I know, this should be Cc: stable@xxxxxxxxxxxxxxx #3.11, correct?
josh
> ---
> v3:
> - no changes
>
> drivers/hid/hid-sony.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
> index 30dbb6b..b18320d 100644
> --- a/drivers/hid/hid-sony.c
> +++ b/drivers/hid/hid-sony.c
> @@ -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");
> --
> 1.8.3.1
>
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