diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2016-03-22 15:42:14 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-04-12 12:43:26 +0200 |
| commit | f35034f8ac72925591ae96841fcbeebad1af1dc8 (patch) | |
| tree | 3ff0a380d6e96b1d0b9835c0b7ad2ea47250d777 /drivers/gpu/drm/drm_crtc.c | |
| parent | d00b39c17573ece6f5fb1385314877d29f540db8 (diff) | |
| download | linux-next-f35034f8ac72925591ae96841fcbeebad1af1dc8.tar.gz | |
drm/core: Fix ordering in drm_mode_config_cleanup.
__drm_atomic_helper_plane_destroy_state calls
drm_framebuffer_unreference, which means that if drm_framebuffer_free
is called before plane->destroy freed memory will be accessed.
A similar case happens for the blob list, which was freed before the
crtc state was, resulting in the unreference_blob from crtc_destroy_state
pointing to garbage memory causing another opportunity for a GPF.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458657734-21866-1-git-send-email-maarten.lankhorst@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 55ffde5a3a4a..f7fe9e153dec 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -5914,6 +5914,15 @@ void drm_mode_config_cleanup(struct drm_device *dev) drm_property_destroy(dev, property); } + list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, + head) { + plane->funcs->destroy(plane); + } + + list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { + crtc->funcs->destroy(crtc); + } + list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, head_global) { drm_property_unreference_blob(blob); @@ -5932,15 +5941,6 @@ void drm_mode_config_cleanup(struct drm_device *dev) drm_framebuffer_free(&fb->refcount); } - list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, - head) { - plane->funcs->destroy(plane); - } - - list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { - crtc->funcs->destroy(crtc); - } - ida_destroy(&dev->mode_config.connector_ida); idr_destroy(&dev->mode_config.tile_idr); idr_destroy(&dev->mode_config.crtc_idr); |