leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm: Reject page_flip for !DRIVER_MODESET

Browse Source 
Somehow this one slipped through, which means drivers without modeset
support can be oopsed (since those also don't call
drm_mode_config_init, which means the crtc lookup will chase an
uninitalized idr).

Reported-by: Alexander Potapenko <glider@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Daniel Vetter 2016-08-20 12:22:11 +02:00 committed by Dave Airlie
parent fa8410b355
commit 6f00975c61
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/drm_crtc.c
View File

@ -5404,6 +5404,9 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
struct drm_pending_vblank_event *e = NULL;
int ret = -EINVAL;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
page_flip->reserved != 0)
return -EINVAL;