Re: [PATCH] media: v4l2-compat-ioctl32.c: copy reserved2 field in get_v4l2_buffer32

Greg Kroah-Hartman
2020-04-17T08:35:10Z

On Fri, Apr 17, 2020 at 11:45:23AM +0900, sy0816.kang@samsung.com wrote:
> From: Sunyoung Kang <sy0816.kang@samsung.com>
>
> get_v4l2_buffer32() didn't copy reserved2 field from userspace to driver.
> So the reserved2 value is not received through compat-ioctl32 in driver.
> This patch copy reserved2 field of v4l2_buffer in get_v4l2_buffer32().
>
> Signed-off-by: Sunyoung Kang <sy0816.kang@samsung.com>
> ---
> drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1 +
> 1 file changed, 1 insertion(+)

What driver is using the reserved fields? They should be ignored as
they are "reserved" for future use.

thanks,

greg k-h