Hi Hans,
Thanks for the update. Please see a few additional comments below.
On Tue, Jan 30, 2018 at 11:27:01AM +0100, Hans Verkuil wrote:
...
> @@ -891,30 +1057,53 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
> case VIDIOC_STREAMOFF:
> case VIDIOC_S_INPUT:
> case VIDIOC_S_OUTPUT:
> - err = get_user(karg.vi, (s32 __user *)up);
> + err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
> + if (!err && assign_in_user((unsigned int __user *)up_native,
> + (compat_uint_t __user *)up))
> + err = -EFAULT;
> compatible_arg = 0;
> break;
>
> case VIDIOC_G_INPUT:
> case VIDIOC_G_OUTPUT:
> + err = alloc_userspace(sizeof(unsigned int), 0,
> + &up_native);
Fits on a single line.
> compatible_arg = 0;
> break;
>
> case VIDIOC_G_EDID:
> case VIDIOC_S_EDID:
> - err = get_v4l2_edid32(&karg.v2edid, up);
> + err = alloc_userspace(sizeof(struct v4l2_edid), 0, &up_native);
> + if (!err)
> + err = get_v4l2_edid32(up_native, up);
> compatible_arg = 0;
> break;
>
> case VIDIOC_G_FMT:
> case VIDIOC_S_FMT:
> case VIDIOC_TRY_FMT:
> - err = get_v4l2_format32(&karg.v2f, up);
> + err = bufsize_v4l2_format(up, &aux_space);
> + if (!err)
> + err = alloc_userspace(sizeof(struct v4l2_format),
> + aux_space, &up_native);
> + if (!err) {
> + aux_buf = up_native + sizeof(struct v4l2_format);
> + err = get_v4l2_format32(up_native, up,
> + aux_buf, aux_space);
> + }
> compatible_arg = 0;
> break;
>
> case VIDIOC_CREATE_BUFS:
> - err = get_v4l2_create32(&karg.v2crt, up);
> + err = bufsize_v4l2_create(up, &aux_space);
> + if (!err)
> + err = alloc_userspace(sizeof(struct v4l2_create_buffers),
> + aux_space, &up_native);
> + if (!err) {
> + aux_buf = up_native + sizeof(struct v4l2_create_buffers);
A few lines over 80 characters. It's not a lot but I see no reason to avoid
wrapping them either.
> + err = get_v4l2_create32(up_native, up,
> + aux_buf, aux_space);
> + }
> compatible_arg = 0;
> break;
>
The above can be addressed later, right now this isn't a priority.
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
--
Sakari Ailus
e-mail: sakari.ailus@xxxxxx