On Fri, 23 Sep 2011, Dan Carpenter wrote:
> Smatch has a new check for Rosenberg type information leaks where
> structs are copied to the user with uninitialized stack data in them.
>
> In this case, the hiddev_devinfo struct has a two byte hole.
>
> struct hiddev_devinfo {
> __u32 bustype; /* 0 4 */
> __u32 busnum; /* 4 4 */
> __u32 devnum; /* 8 4 */
> __u32 ifnum; /* 12 4 */
> __s16 vendor; /* 16 2 */
> __s16 product; /* 18 2 */
> __s16 version; /* 20 2 */
>
> /* XXX 2 bytes hole, try to pack */
>
> __u32 num_applications; /* 24 4 */
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
> index 7c1188b..4ef02b2 100644
> --- a/drivers/hid/usbhid/hiddev.c
> +++ b/drivers/hid/usbhid/hiddev.c
> @@ -641,6 +641,8 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> struct usb_device *dev = hid_to_usb_dev(hid);
> struct usbhid_device *usbhid = hid->driver_data;
>
> + memset(&dinfo, 0, sizeof(dinfo));
> +
> dinfo.bustype = BUS_USB;
> dinfo.busnum = dev->bus->busnum;
> dinfo.devnum = dev->devnum;
Applied, thanks Dan.
--
Jiri Kosina
SUSE Labs
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