From e344b2b5879aa52870e6838212dfb78b7968fcbf Mon Sep 17 00:00:00 2001
From: YaacovHazan <yaacov.hazan@redis.com>
Date: Sun, 15 Dec 2024 21:33:11 +0200
Subject: [PATCH] Fix LUA garbage collector (CVE-2024-46981)

Reset GC state before closing the lua VM to prevent user data
to be wrongly freed while still might be used on destructor callbacks.
---
 src/eval.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/eval.c b/src/eval.c
index eb4b52936..47c66b67c 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -272,6 +272,7 @@ void scriptingRelease(int async) {
     else
         dictRelease(lctx.lua_scripts);
     lctx.lua_scripts_mem = 0;
+    lua_gc(lctx.lua, LUA_GCCOLLECT, 0);
     lua_close(lctx.lua);
 }