Prevent several possible crashes and hangs, limit more struct fields to read-only

autogen/convert_structs.py

@@ -83,7 +83,8 @@ override_field_invisible = {
 }
 
 override_field_immutable = {
-    "MarioState": [ "playerIndex", "controller" ],
+    "MarioState": [ "playerIndex", "controller", "marioObj", "marioBodyState", "statusForCamera" ],
+    "ObjectNode": [ "next", "prev" ],
     "Character": [ "*" ],
     "NetworkPlayer": [ "*" ],
     "TextureInfo": [ "*" ],
@@ -96,7 +97,11 @@ override_field_immutable = {
     "ModFile": [ "*" ],
     "BassAudio": [ "*" ],
     "Painting": [ "id", "imageCount", "textureType", "textureWidth", "textureHeight" ],
-    "SpawnInfo": [ "syncID" ]
+    "SpawnInfo": [ "syncID" ],
+    "CustomLevelInfo": [ "next" ],
+    "GraphNode": [ "next", "prev", "parent" ],
+    "ObjectWarpNode": [ "next "],
+    "SpawnInfo": [ "next" ],
 }
 
 override_field_version_excludes = {
@@ -265,7 +270,29 @@ def get_struct_field_info(struct, field):
 
     return fid, ftype, fimmutable, lvt, lot
 
+def output_nuke_struct(struct):
+    sid = struct['identifier']
+    print('function Nuke' + sid + "(struct)")
+    for field in struct['fields']:
+        fid, ftype, fimmutable, lvt, lot = get_struct_field_info(struct, field)
+        if fimmutable == 'true':
+            continue
+        if sid in override_field_invisible:
+            if fid in override_field_invisible[sid]:
+                continue
+        if lvt == 'LVT_COBJECT':
+            print('    Nuke' + ftype.replace('struct ', '') + '(struct.' + fid + ')')
+        elif lvt == 'LVT_COBJECT_P':
+            print('    struct.' + fid + ' = nil')
+        else:
+            print('    struct.' + fid + ' = 0')
+    print('end')
+    print('')
+
 def build_struct(struct):
+    # debug print out lua nuke functions
+    # output_nuke_struct(struct)
+
     sid = struct['identifier']
 
     # build up table and track column width

docs/lua/structs.md

@@ -539,7 +539,7 @@
 | fullName | `string` | read-only |
 | levelNum | `integer` |  |
 | modIndex | `integer` |  |
-| next | [CustomLevelInfo](structs.md#CustomLevelInfo) |  |
+| next | [CustomLevelInfo](structs.md#CustomLevelInfo) | read-only |
 | script | `Pointer` <`LevelScript`> | read-only |
 | scriptEntryName | `string` | read-only |
 | shortName | `string` | read-only |
@@ -802,9 +802,9 @@
 | children | [GraphNode](structs.md#GraphNode) |  |
 | extraFlags | `integer` |  |
 | flags | `integer` |  |
-| next | [GraphNode](structs.md#GraphNode) |  |
+| next | [GraphNode](structs.md#GraphNode) | read-only |
-| parent | [GraphNode](structs.md#GraphNode) |  |
+| parent | [GraphNode](structs.md#GraphNode) | read-only |
-| prev | [GraphNode](structs.md#GraphNode) |  |
+| prev | [GraphNode](structs.md#GraphNode) | read-only |
 | type | `integer` |  |
 
 [:arrow_up_small:](#)
@@ -1070,8 +1070,8 @@
 | invincTimer | `integer` |  |
 | isSnoring | `integer` |  |
 | knockbackTimer | `integer` |  |
-| marioBodyState | [MarioBodyState](structs.md#MarioBodyState) |  |
+| marioBodyState | [MarioBodyState](structs.md#MarioBodyState) | read-only |
-| marioObj | [Object](structs.md#Object) |  |
+| marioObj | [Object](structs.md#Object) | read-only |
 | minimumBoneY | `number` |  |
 | nonInstantWarpPos | [Vec3f](structs.md#Vec3f) | read-only |
 | numCoins | `integer` |  |
@@ -1095,7 +1095,7 @@
 | splineKeyframeFraction | `number` |  |
 | splineState | `integer` |  |
 | squishTimer | `integer` |  |
-| statusForCamera | [PlayerCameraState](structs.md#PlayerCameraState) |  |
+| statusForCamera | [PlayerCameraState](structs.md#PlayerCameraState) | read-only |
 | terrainSoundAddend | `integer` |  |
 | twirlYaw | `integer` |  |
 | unkB0 | `integer` |  |
@@ -1996,8 +1996,8 @@
 | Field | Type | Access |
 | ----- | ---- | ------ |
 | gfx | [GraphNodeObject](structs.md#GraphNodeObject) | read-only |
-| next | [ObjectNode](structs.md#ObjectNode) |  |
+| next | [ObjectNode](structs.md#ObjectNode) | read-only |
-| prev | [ObjectNode](structs.md#ObjectNode) |  |
+| prev | [ObjectNode](structs.md#ObjectNode) | read-only |
 
 [:arrow_up_small:](#)
 
@@ -2214,10 +2214,10 @@
 | activeAreaIndex | `integer` |  |
 | areaIndex | `integer` |  |
 | behaviorArg | `integer` |  |
-| next | [SpawnInfo](structs.md#SpawnInfo) |  |
+| next | [SpawnInfo](structs.md#SpawnInfo) | read-only |
 | startAngle | [Vec3s](structs.md#Vec3s) | read-only |
 | startPos | [Vec3s](structs.md#Vec3s) | read-only |
-| syncID | `integer` | read-only |
+| syncID | `integer` |  |
 | unk18 | [GraphNode](structs.md#GraphNode) |  |
 
 [:arrow_up_small:](#)

src/engine/graph_node.c

@@ -594,6 +594,7 @@ struct GraphNode *geo_remove_child(struct GraphNode *graphNode) {
     if (graphNode == NULL) { return NULL; }
 
     parent = graphNode->parent;
+    if (!parent) { return NULL; }
     firstChild = &parent->children;
 
     // Remove link with siblings

src/game/area.c

@@ -296,7 +296,10 @@ void load_mario_area(void) {
     stop_sounds_in_continuous_banks();
     load_area(gMarioSpawnInfo->areaIndex);
 
+    if (!gCurrentArea) { return; }
+
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
+        if (!gMarioStates[i].spawnInfo) { continue; }
         gMarioStates[i].spawnInfo->areaIndex = gCurrentArea->index;
     }
 

src/game/behaviors/purple_switch.inc.c

@@ -16,7 +16,7 @@ void bhv_purple_switch_loop(void) {
     u8 anyPlayerOnPlatform = FALSE;
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         if (!is_player_active(&gMarioStates[i])) { continue; }
-        if (gMarioStates[i].marioObj->platform == o) {
+        if (gMarioStates[i].marioObj && gMarioStates[i].marioObj->platform == o) {
             anyPlayerOnPlatform = TRUE;
             break;
         }

src/game/camera.c

@@ -11579,7 +11579,7 @@ void fov_default(struct MarioState *m) {
         camera_approach_f32_symmetric_bool(&gFOVState.fov, 45.f, (45.f - gFOVState.fov) / 30.f);
         gFOVState.unusedIsSleeping = 0;
     }
-    if (m->area->camera->cutscene == CUTSCENE_0F_UNUSED) {
+    if (m->area && m->area->camera && m->area->camera->cutscene == CUTSCENE_0F_UNUSED) {
         gFOVState.fov = 45.f;
     }
 }
@@ -11600,7 +11600,7 @@ void approach_fov_60(UNUSED struct MarioState *m) {
 void approach_fov_45(struct MarioState *m) {
     f32 targetFoV = gFOVState.fov;
 
-    if (m->area->camera->mode == CAMERA_MODE_FIXED && m->area->camera->cutscene == 0) {
+    if (m->area && m->area->camera && m->area->camera->mode == CAMERA_MODE_FIXED && m->area->camera->cutscene == 0) {
         targetFoV = 45.f;
     } else {
         targetFoV = 45.f;
@@ -11620,7 +11620,7 @@ void approach_fov_80(UNUSED struct MarioState *m) {
 void set_fov_bbh(struct MarioState *m) {
     f32 targetFoV = gFOVState.fov;
 
-    if (m->area->camera->mode == CAMERA_MODE_FIXED && m->area->camera->cutscene == 0) {
+    if (m->area && m->area->camera && m->area->camera->mode == CAMERA_MODE_FIXED && m->area->camera->cutscene == 0) {
         targetFoV = 60.f;
     } else {
         targetFoV = 45.f;

src/game/interaction.c

@@ -345,9 +345,11 @@ void mario_drop_held_object(struct MarioState *m) {
         // ! When dropping an object instead of throwing it, it will be put at Mario's
         // y-positon instead of the HOLP's y-position. This fact is often exploited when
         // cloning objects.
-        m->heldObj->oPosX = m->marioBodyState->heldObjLastPosition[0];
+        if (m->marioBodyState) {
-        m->heldObj->oPosY = m->pos[1];
+            m->heldObj->oPosX = m->marioBodyState->heldObjLastPosition[0];
-        m->heldObj->oPosZ = m->marioBodyState->heldObjLastPosition[2];
+            m->heldObj->oPosY = m->pos[1];
+            m->heldObj->oPosZ = m->marioBodyState->heldObjLastPosition[2];
+        }
 
         m->heldObj->oMoveAngleYaw = m->faceAngle[1];
 
@@ -369,9 +371,11 @@ void mario_throw_held_object(struct MarioState *m) {
 
         obj_set_held_state(m->heldObj, bhvCarrySomething5);
 
-        m->heldObj->oPosX = m->marioBodyState->heldObjLastPosition[0] + 32.0f * sins(m->faceAngle[1]);
+        if (m->marioBodyState) {
-        m->heldObj->oPosY = m->marioBodyState->heldObjLastPosition[1];
+            m->heldObj->oPosX = m->marioBodyState->heldObjLastPosition[0] + 32.0f * sins(m->faceAngle[1]);
-        m->heldObj->oPosZ = m->marioBodyState->heldObjLastPosition[2] + 32.0f * coss(m->faceAngle[1]);
+            m->heldObj->oPosY = m->marioBodyState->heldObjLastPosition[1];
+            m->heldObj->oPosZ = m->marioBodyState->heldObjLastPosition[2] + 32.0f * coss(m->faceAngle[1]);
+        }
 
         m->heldObj->oMoveAngleYaw = m->faceAngle[1];
 
@@ -1278,6 +1282,8 @@ static u8 resolve_player_collision(struct MarioState* m, struct MarioState* m2)
     f32 extentY = m->marioObj->hitboxHeight;
     f32 radius = m->marioObj->hitboxRadius * 2.0f;
 
+    if (!m->marioBodyState || !m2->marioBodyState) { return FALSE; }
+
     f32* localTorso = m->marioBodyState->torsoPos;
     f32* remoteTorso = m2->marioBodyState->torsoPos;
 

src/game/mario.c

@@ -85,6 +85,7 @@ s32 is_anim_past_end(struct MarioState *m) {
  */
 s16 set_mario_animation(struct MarioState *m, s32 targetAnimID) {
     struct Object *o = m->marioObj;
+    if (!o || !m->animation) { return 0; }
     struct Animation *targetAnim = m->animation->targetAnim;
 
     if (load_patchable_table(m->animation, targetAnimID)) {
@@ -118,6 +119,7 @@ s16 set_mario_animation(struct MarioState *m, s32 targetAnimID) {
  */
 s16 set_mario_anim_with_accel(struct MarioState *m, s32 targetAnimID, s32 accel) {
     struct Object *o = m->marioObj;
+    if (!o || !m->animation) { return 0; }
     struct Animation *targetAnim = m->animation->targetAnim;
 
     if (load_patchable_table(m->animation, targetAnimID)) {

src/game/obj_behaviors.c

@@ -523,6 +523,7 @@ s8 is_point_within_radius_of_mario(f32 x, f32 y, f32 z, s32 dist) {
         if (!is_player_active(&gMarioStates[i])) { continue; }
         if (!gMarioStates[i].visibleToEnemies) { continue; }
         struct Object* player = gMarioStates[i].marioObj;
+        if (!player) { continue; }
         f32 mGfxX = player->header.gfx.pos[0];
         f32 mGfxY = player->header.gfx.pos[1];
         f32 mGfxZ = player->header.gfx.pos[2];
@@ -540,6 +541,7 @@ s8 is_point_within_radius_of_any_player(f32 x, f32 y, f32 z, s32 dist) {
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         if (!is_player_active(&gMarioStates[i])) { continue; }
         struct Object* player = gMarioStates[i].marioObj;
+        if (!player) { continue; }
         f32 mGfxX = player->header.gfx.pos[0];
         f32 mGfxY = player->header.gfx.pos[1];
         f32 mGfxZ = player->header.gfx.pos[2];
@@ -606,6 +608,7 @@ struct MarioState* nearest_mario_state_to_object(struct Object *obj) {
     struct MarioState* nearest = NULL;
     f32 nearestDist = 0;
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
+        if (!gMarioStates[i].marioObj) { continue; }
         if (gMarioStates[i].marioObj == obj) { continue; }
         if (!gMarioStates[i].visibleToEnemies) { continue; }
         if (!is_player_active(&gMarioStates[i])) { continue; }
@@ -624,6 +627,7 @@ struct MarioState* nearest_possible_mario_state_to_object(struct Object *obj) {
     struct MarioState* nearest = NULL;
     f32 nearestDist = 0;
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
+        if (!gMarioStates[i].marioObj) { continue; }
         if (gMarioStates[i].marioObj == obj) { continue; }
         if (!is_player_active(&gMarioStates[i])) { continue; }
         float dist = dist_between_objects(obj, gMarioStates[i].marioObj);
@@ -655,6 +659,7 @@ struct MarioState *nearest_interacting_mario_state_to_object(struct Object *obj)
     f32 nearestDist = 0;
 
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
+        if (!gMarioStates[i].marioObj) { continue; }
         if (gMarioStates[i].marioObj == obj) { continue; }
         if (gMarioStates[i].interactObj != obj) { continue; }
         if (!gMarioStates[i].visibleToEnemies) { continue; }

src/game/object_collision.c

@@ -9,6 +9,7 @@
 #include "pc/network/network_player.h"
 
 struct Object *debug_print_obj_collision(struct Object *a) {
+    if (!a) { return NULL; }
     struct Object *sp24;
 
     for (s32 i = 0; i < a->numCollidedObjs; i++) {
@@ -22,6 +23,7 @@ struct Object *debug_print_obj_collision(struct Object *a) {
 }
 
 int detect_player_hitbox_overlap(struct MarioState* local, struct MarioState* remote, f32 scale) {
+    if (!local || !remote) { return FALSE; }
     if (local->marioObj == NULL || local->marioObj->oIntangibleTimer != 0) { return FALSE; }
     if (remote->marioObj == NULL || remote->marioObj->oIntangibleTimer != 0) { return FALSE; }
 
@@ -63,6 +65,7 @@ int detect_player_hitbox_overlap(struct MarioState* local, struct MarioState* re
 }
 
 s32 detect_object_hitbox_overlap(struct Object *a, struct Object *b) {
+    if (!a || !b) { return 0; }
     f32 sp3C = a->oPosY - a->hitboxDownOffset;
     f32 sp38 = b->oPosY - b->hitboxDownOffset;
     f32 dx = a->oPosX - b->oPosX;
@@ -105,6 +108,8 @@ s32 detect_object_hitbox_overlap(struct Object *a, struct Object *b) {
 }
 
 s32 detect_object_hurtbox_overlap(struct Object *a, struct Object *b) {
+    if (!a || !b) { return 0; }
+
     f32 sp3C = a->oPosY - a->hitboxDownOffset;
     f32 sp38 = b->oPosY - b->hitboxDownOffset;
     f32 sp34 = a->oPosX - b->oPosX;
@@ -137,26 +142,30 @@ s32 detect_object_hurtbox_overlap(struct Object *a, struct Object *b) {
 }
 
 void clear_object_collision(struct Object *a) {
+    if (!a) { return; }
     struct Object *sp4 = (struct Object *) a->header.next;
 
-    while (sp4 != a) {
+    while (sp4 && sp4 != a) {
         sp4->numCollidedObjs = 0;
         sp4->collidedObjInteractTypes = 0;
         if (sp4->oIntangibleTimer > 0) {
             sp4->oIntangibleTimer--;
         }
+        if (sp4 == (struct Object *)sp4->header.next) { break; }
         sp4 = (struct Object *) sp4->header.next;
     }
 }
 
 void check_collision_in_list(struct Object *a, struct Object *b, struct Object *c) {
+    if (!a) { return; }
     if (a->oIntangibleTimer == 0) {
-        while (b != c) {
+        while (b && b != c) {
             if (b->oIntangibleTimer == 0) {
                 if (detect_object_hitbox_overlap(a, b) && b->hurtboxRadius != 0.0f) {
                     detect_object_hurtbox_overlap(a, b);
                 }
             }
+            if (b == (struct Object *)b->header.next) { break; }
             b = (struct Object *) b->header.next;
         }
     }
@@ -166,7 +175,7 @@ void check_player_object_collision(void) {
     struct Object *sp1C = (struct Object *) &gObjectLists[OBJ_LIST_PLAYER];
     struct Object *sp18 = (struct Object *) sp1C->header.next;
 
-    while (sp18 != sp1C) {
+    while (sp18 && sp18 != sp1C) {
         check_collision_in_list(sp18, (struct Object *) sp18->header.next, sp1C);
         check_collision_in_list(sp18, (struct Object *) gObjectLists[OBJ_LIST_POLELIKE].next,
                       (struct Object *) &gObjectLists[OBJ_LIST_POLELIKE]);
@@ -202,8 +211,9 @@ void check_pushable_object_collision(void) {
     struct Object *sp1C = (struct Object *) &gObjectLists[OBJ_LIST_PUSHABLE];
     struct Object *sp18 = (struct Object *) sp1C->header.next;
 
-    while (sp18 != sp1C) {
+    while (sp18 && sp18 != sp1C) {
         check_collision_in_list(sp18, (struct Object *) sp18->header.next, sp1C);
+        if (sp18 == (struct Object *)sp18->header.next) { break; }
         sp18 = (struct Object *) sp18->header.next;
     }
 }
@@ -212,7 +222,7 @@ void check_destructive_object_collision(void) {
     struct Object *sp1C = (struct Object *) &gObjectLists[OBJ_LIST_DESTRUCTIVE];
     struct Object *sp18 = (struct Object *) sp1C->header.next;
 
-    while (sp18 != sp1C) {
+    while (sp18 && sp18 != sp1C) {
         if (sp18->oDistanceToMario < 2000.0f && !(sp18->activeFlags & ACTIVE_FLAG_UNK9)) {
             check_collision_in_list(sp18, (struct Object *) sp18->header.next, sp1C);
             check_collision_in_list(sp18, (struct Object *) gObjectLists[OBJ_LIST_GENACTOR].next,
@@ -222,6 +232,7 @@ void check_destructive_object_collision(void) {
             check_collision_in_list(sp18, (struct Object *) gObjectLists[OBJ_LIST_SURFACE].next,
                           (struct Object *) &gObjectLists[OBJ_LIST_SURFACE]);
         }
+        if (sp18 == (struct Object *)sp18->header.next) { break; }
         sp18 = (struct Object *) sp18->header.next;
     }
 }

src/game/object_helpers.c

@@ -2532,6 +2532,7 @@ s32 cur_obj_wait_then_blink(s32 timeUntilBlinking, s32 numBlinks) {
 s32 cur_obj_is_mario_ground_pounding_platform(void) {
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         if (!is_player_active(&gMarioStates[i])) { continue; }
+        if (!gMarioStates[i].marioObj) { continue; }
         if (gMarioStates[i].marioObj->platform == o) {
             if (gMarioStates[i].action == ACT_GROUND_POUND_LAND) {
                 return TRUE;
@@ -2554,6 +2555,7 @@ void spawn_mist_particles_with_sound(u32 sp18) {
 void cur_obj_push_mario_away(f32 radius) {
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         struct Object* player = gMarioStates[i].marioObj;
+        if (!player) { continue; }
         f32 marioRelX = player->oPosX - o->oPosX;
         f32 marioRelZ = player->oPosZ - o->oPosZ;
         f32 marioDist = sqrtf(sqr(marioRelX) + sqr(marioRelZ));
@@ -2570,6 +2572,7 @@ void cur_obj_push_mario_away(f32 radius) {
 void cur_obj_push_mario_away_from_cylinder(f32 radius, f32 extentY) {
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         struct Object* player = gMarioStates[i].marioObj;
+        if (!player) { continue; }
         f32 marioRelY = player->oPosY - o->oPosY;
 
         if (marioRelY < 0.0f) {
@@ -2733,6 +2736,7 @@ s32 cur_obj_mario_far_away(void) {
     for (s32 i = 0; i < MAX_PLAYERS; i++) {
         if (!is_player_active(&gMarioStates[i])) { continue; }
         struct Object* player = gMarioStates[i].marioObj;
+        if (!player) { continue; }
         f32 dx = o->oHomeX - player->oPosX;
         f32 dy = o->oHomeY - player->oPosY;
         f32 dz = o->oHomeZ - player->oPosZ;
@@ -2880,6 +2884,7 @@ void cur_obj_if_hit_wall_bounce_away(void) {
 }
 
 s32 cur_obj_hide_if_mario_far_away_y(f32 distY) {
+    if (!gMarioStates[0].marioObj) { return FALSE; }
     if (absf(o->oPosY - gMarioStates[0].marioObj->oPosY) < distY * draw_distance_scalar()) {
         cur_obj_unhide();
         return FALSE;

src/game/object_list_processor.c

@@ -347,10 +347,13 @@ void bhv_mario_update(void) {
  * including firstObj itself. Return the number of objects that were updated.
  */
 s32 update_objects_starting_at(struct ObjectNode *objList, struct ObjectNode *firstObj) {
+    if (!firstObj) { return 0; }
+
     s32 count = 0;
 
     while (objList != firstObj) {
         gCurrentObject = (struct Object *) firstObj;
+        if (!gCurrentObject) { break; }
 
         gCurrentObject->header.gfx.node.flags |= GRAPH_RENDER_HAS_ANIMATION;
         cur_obj_update();
@@ -372,11 +375,13 @@ s32 update_objects_starting_at(struct ObjectNode *objList, struct ObjectNode *fi
  * updated)
  */
 s32 update_objects_during_time_stop(struct ObjectNode *objList, struct ObjectNode *firstObj) {
+    if (!firstObj) { return 0; }
     s32 count = 0;
     s32 unfrozen;
 
     while (objList != firstObj) {
         gCurrentObject = (struct Object *) firstObj;
+        if (!gCurrentObject) { break; }
 
         unfrozen = FALSE;
 
@@ -433,10 +438,12 @@ s32 update_objects_in_list(struct ObjectNode *objList) {
  * Unload any objects in the list that have been deactivated.
  */
 s32 unload_deactivated_objects_in_list(struct ObjectNode *objList) {
+    if (!objList) { return 0; }
     struct ObjectNode *obj = objList->next;
 
     while (objList != obj) {
         gCurrentObject = (struct Object *) obj;
+        if (!gCurrentObject) { break; }
 
         obj = obj->next;
 

src/game/rendering_graph_node.c

@@ -42,7 +42,7 @@
  *
  */
 
-#define MATRIX_STACK_SIZE 32
+#define MATRIX_STACK_SIZE 64
 
 f32 gProjectionMaxNearValue = 5;
 s16 gProjectionVanillaNearValue = 100;
@@ -327,9 +327,18 @@ void patch_mtx_interpolated(f32 delta) {
 static u8 increment_mat_stack() {
     Mtx *mtx = alloc_display_list(sizeof(*mtx));
     Mtx *mtxPrev = alloc_display_list(sizeof(*mtxPrev));
-    if (mtx == NULL || mtxPrev == NULL) { LOG_ERROR("Failed to allocate our matrices for the matrix stack."); return FALSE; }
+    if (mtx == NULL || mtxPrev == NULL) {
+        LOG_ERROR("Failed to allocate our matrices for the matrix stack.");
+        return FALSE;
+    }
 
     gMatStackIndex++;
+    if (gMatStackIndex >= MATRIX_STACK_SIZE) {
+        LOG_ERROR("Exceeded matrix stack size.");
+        gMatStackIndex = MATRIX_STACK_SIZE - 1;
+        return FALSE;
+    }
+
     mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
     mtxf_to_mtx(mtxPrev, gMatStackPrev[gMatStackIndex]);
     gMatStackFixed[gMatStackIndex] = mtx;
@@ -529,7 +538,7 @@ static void geo_process_camera(struct GraphNodeCamera *node) {
     Mat4 cameraTransform;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     Mtx *rollMtx = alloc_display_list(sizeof(*rollMtx));
     if (rollMtx == NULL) { return; }
@@ -588,7 +597,7 @@ static void geo_process_translation_rotation(struct GraphNodeTranslationRotation
     Vec3f translation;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     vec3s_to_vec3f(translation, node->translation);
     mtxf_rotate_zxy_and_translate(mtxf, translation, node->rotation);
@@ -617,7 +626,7 @@ static void geo_process_translation(struct GraphNodeTranslation *node) {
     Vec3f translation;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     vec3s_to_vec3f(translation, node->translation);
     mtxf_rotate_zxy_and_translate(mtxf, translation, gVec3sZero);
@@ -645,7 +654,7 @@ static void geo_process_rotation(struct GraphNodeRotation *node) {
     Mat4 mtxf;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     mtxf_rotate_zxy_and_translate(mtxf, gVec3fZero, node->rotation);
     mtxf_mul(gMatStack[gMatStackIndex + 1], mtxf, gMatStack[gMatStackIndex]);
@@ -681,7 +690,7 @@ static void geo_process_scale(struct GraphNodeScale *node) {
     Vec3f prevScaleVec;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     vec3f_set(scaleVec, node->scale, node->scale, node->scale);
     mtxf_scale_vec3f(gMatStack[gMatStackIndex + 1], gMatStack[gMatStackIndex], scaleVec);
@@ -717,7 +726,7 @@ static void geo_process_billboard(struct GraphNodeBillboard *node) {
     Vec3f translation;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     s16 nextMatStackIndex = gMatStackIndex + 1;
 
@@ -890,7 +899,7 @@ static void geo_process_animated_part(struct GraphNodeAnimatedPart *node) {
     Vec3f translationPrev;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     u16 *animAttribute = gCurrAnimAttribute;
     u8 animType = gCurAnimType;
@@ -983,7 +992,7 @@ static void geo_process_shadow(struct GraphNodeShadow *node) {
     f32 shadowScale;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
     if (gCurGraphNodeCamera != NULL && gCurGraphNodeObject != NULL) {
         if (gCurGraphNodeHeldObject != NULL) {
@@ -1191,6 +1200,9 @@ static void geo_process_object(struct Object *node) {
     s32 hasAnimation = (node->header.gfx.node.flags & GRAPH_RENDER_HAS_ANIMATION) != 0;
     Vec3f scalePrev;
 
+    // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+
     if (node->hookRender) {
         smlua_call_event_hooks_object_param(HOOK_ON_OBJECT_RENDER, node);
     }
@@ -1379,7 +1391,7 @@ void geo_process_held_object(struct GraphNodeHeldObject *node) {
     Vec3f scalePrev;
 
     // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
-    if (gMatStackIndex >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
+    if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { LOG_ERROR("Preventing attempt to exceed the maximum size %i for our matrix stack with size of %i.", MATRIX_STACK_SIZE - 1, gMatStackIndex); return; }
 
 #ifdef F3DEX_GBI_2
     gSPLookAt(gDisplayListHead++, &lookAt);
@@ -1476,6 +1488,7 @@ void geo_process_node_and_siblings(struct GraphNode *firstNode) {
     s16 iterateChildren = TRUE;
     struct GraphNode *curGraphNode = firstNode;
     if (curGraphNode == NULL) { return; }
+    u32 depthSanity = 0;
 
     struct GraphNode *parent = curGraphNode->parent;
 
@@ -1489,6 +1502,13 @@ void geo_process_node_and_siblings(struct GraphNode *firstNode) {
         if (curGraphNode == NULL) {
             break;
         }
+
+        // Sanity check our stack index, If we above or equal to our stack size. Return to prevent OOB\.
+        if ((gMatStackIndex + 1) >= MATRIX_STACK_SIZE) { break; }
+
+        // Break out of endless loops
+        if (++depthSanity > 5000) { break; }
+
         if (curGraphNode->flags & GRAPH_RENDER_ACTIVE) {
             if (curGraphNode->flags & GRAPH_RENDER_CHILDREN_FIRST) {
                 geo_try_process_children(curGraphNode);

src/game/shadow.c

@@ -583,6 +583,7 @@ s8 correct_shadow_solidity_for_animations(s32 playerIndex, u8 initialSolidity, s
 
     extern struct MarioState gMarioStates[];
     player = gMarioStates[playerIndex].marioObj;
+    if (!player) { return SHADOW_SOLIDITY_NO_SHADOW; }
 
     animFrame = player->header.gfx.animInfo.animFrame;
     switch (player->header.gfx.animInfo.animID) {

src/game/spawn_object.c

@@ -141,8 +141,8 @@ void unused_deallocate(struct LinkedList *freeList, struct LinkedList *node) {
 static void deallocate_object(struct ObjectNode *freeList, struct ObjectNode *obj) {
     if (!obj || !freeList) { return; }
     // Remove from object list
-    obj->next->prev = obj->prev;
+    if (obj->next) { obj->next->prev = obj->prev; }
-    obj->prev->next = obj->next;
+    if (obj->prev) { obj->prev->next = obj->next; }
 
     // Insert at beginning of free list
     obj->next = freeList->next;

src/pc/lua/smlua_cobject_autogen.c

@@ -404,7 +404,7 @@ static struct LuaObjectField sCustomLevelInfoFields[LUA_CUSTOM_LEVEL_INFO_FIELD_
     { "fullName",        LVT_STRING_P,      offsetof(struct CustomLevelInfo, fullName),        true,  LOT_NONE            },
     { "levelNum",        LVT_S16,           offsetof(struct CustomLevelInfo, levelNum),        false, LOT_NONE            },
     { "modIndex",        LVT_S32,           offsetof(struct CustomLevelInfo, modIndex),        false, LOT_NONE            },
-    { "next",            LVT_COBJECT_P,     offsetof(struct CustomLevelInfo, next),            false, LOT_CUSTOMLEVELINFO },
+    { "next",            LVT_COBJECT_P,     offsetof(struct CustomLevelInfo, next),            true,  LOT_CUSTOMLEVELINFO },
     { "script",          LVT_LEVELSCRIPT_P, offsetof(struct CustomLevelInfo, script),          true,  LOT_POINTER         },
     { "scriptEntryName", LVT_STRING_P,      offsetof(struct CustomLevelInfo, scriptEntryName), true,  LOT_NONE            },
     { "shortName",       LVT_STRING_P,      offsetof(struct CustomLevelInfo, shortName),       true,  LOT_NONE            },
@@ -630,9 +630,9 @@ static struct LuaObjectField sGraphNodeFields[LUA_GRAPH_NODE_FIELD_COUNT] = {
     { "extraFlags", LVT_U8,        offsetof(struct GraphNode, extraFlags), false, LOT_NONE      },
     { "flags",      LVT_S16,       offsetof(struct GraphNode, flags),      false, LOT_NONE      },
 //  { "georef",     LVT_???,       offsetof(struct GraphNode, georef),     true,  LOT_???       }, <--- UNIMPLEMENTED
-    { "next",       LVT_COBJECT_P, offsetof(struct GraphNode, next),       false, LOT_GRAPHNODE },
+    { "next",       LVT_COBJECT_P, offsetof(struct GraphNode, next),       true,  LOT_GRAPHNODE },
-    { "parent",     LVT_COBJECT_P, offsetof(struct GraphNode, parent),     false, LOT_GRAPHNODE },
+    { "parent",     LVT_COBJECT_P, offsetof(struct GraphNode, parent),     true,  LOT_GRAPHNODE },
-    { "prev",       LVT_COBJECT_P, offsetof(struct GraphNode, prev),       false, LOT_GRAPHNODE },
+    { "prev",       LVT_COBJECT_P, offsetof(struct GraphNode, prev),       true,  LOT_GRAPHNODE },
     { "type",       LVT_S16,       offsetof(struct GraphNode, type),       false, LOT_NONE      },
 };
 
@@ -855,8 +855,8 @@ static struct LuaObjectField sMarioStateFields[LUA_MARIO_STATE_FIELD_COUNT] = {
     { "invincTimer",              LVT_S16,       offsetof(struct MarioState, invincTimer),              false, LOT_NONE              },
     { "isSnoring",                LVT_U8,        offsetof(struct MarioState, isSnoring),                false, LOT_NONE              },
     { "knockbackTimer",           LVT_U8,        offsetof(struct MarioState, knockbackTimer),           false, LOT_NONE              },
-    { "marioBodyState",           LVT_COBJECT_P, offsetof(struct MarioState, marioBodyState),           false, LOT_MARIOBODYSTATE    },
+    { "marioBodyState",           LVT_COBJECT_P, offsetof(struct MarioState, marioBodyState),           true,  LOT_MARIOBODYSTATE    },
-    { "marioObj",                 LVT_COBJECT_P, offsetof(struct MarioState, marioObj),                 false, LOT_OBJECT            },
+    { "marioObj",                 LVT_COBJECT_P, offsetof(struct MarioState, marioObj),                 true,  LOT_OBJECT            },
     { "minimumBoneY",             LVT_F32,       offsetof(struct MarioState, minimumBoneY),             false, LOT_NONE              },
     { "nonInstantWarpPos",        LVT_COBJECT,   offsetof(struct MarioState, nonInstantWarpPos),        true,  LOT_VEC3F             },
     { "numCoins",                 LVT_S16,       offsetof(struct MarioState, numCoins),                 false, LOT_NONE              },
@@ -880,7 +880,7 @@ static struct LuaObjectField sMarioStateFields[LUA_MARIO_STATE_FIELD_COUNT] = {
     { "splineKeyframeFraction",   LVT_F32,       offsetof(struct MarioState, splineKeyframeFraction),   false, LOT_NONE              },
     { "splineState",              LVT_S32,       offsetof(struct MarioState, splineState),              false, LOT_NONE              },
     { "squishTimer",              LVT_U8,        offsetof(struct MarioState, squishTimer),              false, LOT_NONE              },
-    { "statusForCamera",          LVT_COBJECT_P, offsetof(struct MarioState, statusForCamera),          false, LOT_PLAYERCAMERASTATE },
+    { "statusForCamera",          LVT_COBJECT_P, offsetof(struct MarioState, statusForCamera),          true,  LOT_PLAYERCAMERASTATE },
     { "terrainSoundAddend",       LVT_U32,       offsetof(struct MarioState, terrainSoundAddend),       false, LOT_NONE              },
     { "twirlYaw",                 LVT_S16,       offsetof(struct MarioState, twirlYaw),                 false, LOT_NONE              },
     { "unkB0",                    LVT_S16,       offsetof(struct MarioState, unkB0),                    false, LOT_NONE              },
@@ -1759,9 +1759,9 @@ static struct LuaObjectField sObjectHitboxFields[LUA_OBJECT_HITBOX_FIELD_COUNT]
 
 #define LUA_OBJECT_NODE_FIELD_COUNT 3
 static struct LuaObjectField sObjectNodeFields[LUA_OBJECT_NODE_FIELD_COUNT] = {
-    { "gfx",  LVT_COBJECT,   offsetof(struct ObjectNode, gfx),  true,  LOT_GRAPHNODEOBJECT },
+    { "gfx",  LVT_COBJECT,   offsetof(struct ObjectNode, gfx),  true, LOT_GRAPHNODEOBJECT },
-    { "next", LVT_COBJECT_P, offsetof(struct ObjectNode, next), false, LOT_OBJECTNODE      },
+    { "next", LVT_COBJECT_P, offsetof(struct ObjectNode, next), true, LOT_OBJECTNODE      },
-    { "prev", LVT_COBJECT_P, offsetof(struct ObjectNode, prev), false, LOT_OBJECTNODE      },
+    { "prev", LVT_COBJECT_P, offsetof(struct ObjectNode, prev), true, LOT_OBJECTNODE      },
 };
 
 #define LUA_OBJECT_WARP_NODE_FIELD_COUNT 3
@@ -1922,10 +1922,10 @@ static struct LuaObjectField sSpawnInfoFields[LUA_SPAWN_INFO_FIELD_COUNT] = {
     { "areaIndex",       LVT_S8,        offsetof(struct SpawnInfo, areaIndex),       false, LOT_NONE      },
     { "behaviorArg",     LVT_U32,       offsetof(struct SpawnInfo, behaviorArg),     false, LOT_NONE      },
 //  { "behaviorScript",  LVT_???,       offsetof(struct SpawnInfo, behaviorScript),  false, LOT_???       }, <--- UNIMPLEMENTED
-    { "next",            LVT_COBJECT_P, offsetof(struct SpawnInfo, next),            false, LOT_SPAWNINFO },
+    { "next",            LVT_COBJECT_P, offsetof(struct SpawnInfo, next),            true,  LOT_SPAWNINFO },
     { "startAngle",      LVT_COBJECT,   offsetof(struct SpawnInfo, startAngle),      true,  LOT_VEC3S     },
     { "startPos",        LVT_COBJECT,   offsetof(struct SpawnInfo, startPos),        true,  LOT_VEC3S     },
-    { "syncID",          LVT_U32,       offsetof(struct SpawnInfo, syncID),          true,  LOT_NONE      },
+    { "syncID",          LVT_U32,       offsetof(struct SpawnInfo, syncID),          false, LOT_NONE      },
     { "unk18",           LVT_COBJECT_P, offsetof(struct SpawnInfo, unk18),           false, LOT_GRAPHNODE },
 };