From 1dda6805471d4120dba2fa0f2cc1053c2dab28de Mon Sep 17 00:00:00 2001 From: YoungJun Cho Date: Tue, 29 Oct 2013 20:30:26 +0900 Subject: [PATCH] drm: delete unconsumed pending event list in drm_events_release 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 Signed-off-by: Kyungmin Park Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_fops.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index d0e2766..ee2d330 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -378,8 +378,10 @@ static void drm_events_release(struct drm_file *file_priv) } /* Remove unconsumed events */ - list_for_each_entry_safe(e, et, &file_priv->event_list, link) + list_for_each_entry_safe(e, et, &file_priv->event_list, link) { + list_del(&e->link); e->destroy(e); + } spin_unlock_irqrestore(&dev->event_lock, flags); } -- 2.7.4