From e236ad83483ec28eaff084393d88108fae92d9c3 Mon Sep 17 00:00:00 2001
From: SmallJoker <SmallJoker@users.noreply.github.com>
Date: Sun, 11 Aug 2024 20:21:12 +0200
Subject: [PATCH] Lua API: fix OOB array access in find_nodes_near (#14948)

---
 src/script/lua_api/l_env.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/script/lua_api/l_env.cpp b/src/script/lua_api/l_env.cpp
index 2b3d15bea..f5ed2804c 100644
--- a/src/script/lua_api/l_env.cpp
+++ b/src/script/lua_api/l_env.cpp
@@ -970,8 +970,8 @@ int ModApiEnvBase::findNodesInArea(lua_State *L, const NodeDefManager *ndef,
 		});
 
 		// last filter table is at top of stack
-		u32 i = filter.size() - 1;
-		do {
+		u32 i = filter.size();
+		while (i --> 0) {
 			if (idx[i] == 0) {
 				// No such node found -> drop the empty table
 				lua_pop(L, 1);
@@ -979,7 +979,7 @@ int ModApiEnvBase::findNodesInArea(lua_State *L, const NodeDefManager *ndef,
 				// This node was found -> put table into the return table
 				lua_setfield(L, base, ndef->get(filter[i]).name.c_str());
 			}
-		} while (i-- != 0);
+		}
 
 		assert(lua_gettop(L) == base);
 		return 1;