]> git.karo-electronics.de Git - linux-beck.git/commit
drm: Don't call drm_for_each_crtc with a non-KMS driver
authorMichel Dänzer <michel.daenzer@amd.com>
Wed, 30 Nov 2016 08:30:01 +0000 (17:30 +0900)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 30 Nov 2016 09:13:00 +0000 (10:13 +0100)
commite94bd1736f1f60e916a85a80c0b0ebeaae36cce5
tree6be5bed68a1db424105a5f5f4513129b4c376f07
parente5517c2a5a49ed5e99047008629f1cd60246ea0e
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
drivers/gpu/drm/drm_ioctl.c