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When there are unconsumed pending events, the events are destroyed by calling destroy callback, but the events list are remained, because there is no list_del(). It is possible that the page flip request is handled after drm_events_release() is called and before drm_fb_release(). In this case a drm_pending_event is remained not freed. So exynos driver checks again to remove it in its post close routine. But the file_priv->event_list contains undeleted ones, this can make oops for accessing invalid memory. Signed-off-by: YoungJun Cho <yj44.cho@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Dave Airlie <airlied@redhat.com> |
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