linux/drivers/gpu
Jérôme Glisse 054892ed6a drm/amdgpu: forbid mapping of userptr bo through radeon device file
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 populated before anyone does
try to mmap it because then TTM_PAGE_FLAG_SG would be set in in the
ttm_tt flags. But that flag is check before ttm_tt_populate in the ttm
vm fault handler.

So to be safe just add a check to verify_access() callback.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-04-21 20:03:47 -04:00
..
drm drm/amdgpu: forbid mapping of userptr bo through radeon device file 2016-04-21 20:03:47 -04:00
host1x Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2016-03-21 13:48:00 -07:00
ipu-v3 gpu: ipu-v3: ipu-dmfc: Rename ipu_dmfc_init_channel to ipu_dmfc_config_wait4eot 2016-03-31 11:24:33 +02:00
vga vga_switcheroo: Add support for switching only the DDC 2016-02-09 11:21:07 +01:00
Makefile