diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2015-11-11 13:29:08 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2015-11-17 14:02:13 +0300 |
| commit | 4572372847680ee04f184df916d5cf007c94ff7e (patch) | |
| tree | 8eafa5ba14dc1ce9da881cc04d3471df6ea39e5a | |
| parent | 24e79d0ddc416184594aa8193023c15d85ab15db (diff) | |
| download | linux-4572372847680ee04f184df916d5cf007c94ff7e.tar.xz | |
drm/core: Fix old_fb handling in drm_mode_atomic_ioctl.
plane_mask should be cleared inside the retry loop, because it gets
reset on every retry. Without this fix the plane->fb refcounting might
get out of sync on retries, resulting in either leaked memory or
use-after-free.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: stable@vger.kernel.org #v4.3
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447237751-9663-3-git-send-email-maarten.lankhorst@ubuntu.com
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 7bb3845d9974..0ac31b1ecb67 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1446,7 +1446,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, struct drm_plane *plane; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; - unsigned plane_mask = 0; + unsigned plane_mask; int ret = 0; unsigned int i, j; @@ -1486,6 +1486,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); retry: + plane_mask = 0; copied_objs = 0; copied_props = 0; |