From bc1c5829ecc698e41379f461f1fd7e8d600b879f Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 25 Jan 2023 12:38:37 +0100 Subject: [PATCH 0031/1085] drm/vc4: hvs: Initialize the dlist allocation list entry The vc4_hvs_dlist_allocation structure has a list that we don't initialize when we allocate a new instance. This makes any call reading the list structure (such as list_empty) fail with a NULL pointer dereference. Let's make sure our list is always initialized. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hvs.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -457,6 +457,8 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs if (!alloc) return ERR_PTR(-ENOMEM); + INIT_LIST_HEAD(&alloc->node); + spin_lock_irqsave(&hvs->mm_lock, flags); ret = drm_mm_insert_node(&hvs->dlist_mm, &alloc->mm_node, dlist_count);