tree 6be5bed68a1db424105a5f5f4513129b4c376f07
parent e5517c2a5a49ed5e99047008629f1cd60246ea0e
author Michel Dänzer <michel.daenzer@amd.com> 1480494601 +0900
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1480497180 +0100

drm: Don't call drm_for_each_crtc with a non-KMS driver

Fixes oops if userspace calls DRM_IOCTL_GET_CAP for
 DRM_CAP_PAGE_FLIP_TARGET on a non-KMS device node. (Normal userspace
doesn't do that, discovered by syzkaller)

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Fixes: f837297ad824 ("drm: Add DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags v2")
Cc: stable@vger.kernel.org
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161130083002.1520-1-michel@daenzer.net