There are also checks in (amdgpu|radeon)_gem_mmap_ioctl() to prevent
this as well.
But it shouldn't hurt us to check that here as well. So both patches are
Reviewed-by: Christian König
Regards,
Christian.
Am 19.04.2016 um 15:07 schrieb Jérôme Glisse:
> Allowing userptr bo which are basicly
On Wed, Apr 20, 2016 at 9:26 AM, Christian König
wrote:
> There are also checks in (amdgpu|radeon)_gem_mmap_ioctl() to prevent this as
> well.
>
> But it shouldn't hurt us to check that here as well. So both patches are
> Reviewed-by: Christian König
Applied both. Thanks!
Alex
>
> Regards,
Allowing userptr bo which are basicly a list of page from some vma
(so either anonymous page or file backed page) would lead to serious
corruption of kernel structures and counters (because we overwrite
the page->mapping field when mapping buffer).
This will already block if the buffer was populat
