From 5002ff9abe86e9573952e2dc45ec9229d0044a3b Mon Sep 17 00:00:00 2001
From: s1lentq <s1lentsk@yandex.ru>
Date: Sun, 14 Jan 2024 00:18:08 +0700
Subject: [PATCH] Prevent crash "Cache_UnlinkLRU: NULL link" on client-side if
 aiment with sprite model will be to render as a studio model

---
 rehlds/engine/sv_main.cpp | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/rehlds/engine/sv_main.cpp b/rehlds/engine/sv_main.cpp
index 640cb2a..6d0387d 100644
--- a/rehlds/engine/sv_main.cpp
+++ b/rehlds/engine/sv_main.cpp
@@ -4698,11 +4698,25 @@ void SV_WriteEntitiesToClient(client_t *client, sizebuf_t *msg)
 		auto &entityState = curPack->entities[i];
 		if (entityState.number > MAX_CLIENTS)
 		{
-			if (sv_rehlds_attachedentities_playeranimationspeed_fix.string[0] == '1'
-				&& entityState.movetype == MOVETYPE_FOLLOW
-				&& 1 <= entityState.aiment && entityState.aiment <= MAX_CLIENTS)
+			if (entityState.movetype == MOVETYPE_FOLLOW && entityState.aiment > 0)
 			{
-				attachedEntCount[entityState.aiment]++;
+				if (sv_rehlds_attachedentities_playeranimationspeed_fix.string[0] == '1' &&
+					entityState.aiment <= MAX_CLIENTS)
+				{
+					attachedEntCount[entityState.aiment]++;
+				}
+
+				// Prevent crash "Cache_UnlinkLRU: NULL link" on client-side
+				// if aiment with sprite model will be to render as a studio model
+				if (entityState.aiment < g_psv.num_edicts)
+				{
+					edict_t *ent = &g_psv.edicts[entityState.aiment];
+					if ((ent->v.modelindex >= 0 && ent->v.modelindex < MAX_MODELS)
+						&& g_psv.models[ent->v.modelindex]->type != mod_studio)
+					{
+						entityState.aiment = 0;
+					}
+				}
 			}
 
 			// Prevent spam "Non-sprite set to glow!" in console on client-side