On Wed, Jul 12, 2017 at 02:18:32PM +0800, Jeffy Chen wrote:
> DRM_IOCTL_VERSION is supposed to update the name_len/date_len/desc_len
> fields to user.
>
> Fixes: 012c6741c6aa("switch compat_drm_version() to drm_ioctl_kernel()")
> Signed-off-by: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Linus, since Dave is a bit out with flu and this bug only exists in your
tree (not yet in drm-next), can you pls apply this directly? It's a fumble
in Al's rework. Direct mbox link from patchwork, in case you don't have
that in your archives anywhere:
https://patchwork.freedesktop.org/patch/166318/mbox/
Thanks, Daniel
>
> ---
>
> drivers/gpu/drm/drm_ioc32.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
> index 94acf51..2789356 100644
> --- a/drivers/gpu/drm/drm_ioc32.c
> +++ b/drivers/gpu/drm/drm_ioc32.c
> @@ -112,6 +112,9 @@ static int compat_drm_version(struct file *file, unsigned int cmd,
> v32.version_major = v.version_major;
> v32.version_minor = v.version_minor;
> v32.version_patchlevel = v.version_patchlevel;
> + v32.name_len = v.name_len;
> + v32.date_len = v.date_len;
> + v32.desc_len = v.desc_len;
> if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
> return -EFAULT;
> return 0;
> --
> 2.1.4
>
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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