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lua/SOURCES/lua-5.4-CVE-2022-28805.patch

23 lines
852 B

From 1f3c6f4534c6411313361697d98d1145a1f030fa Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 15 Feb 2022 12:28:46 -0300
Subject: [PATCH] Bug: Lua can generate wrong code when _ENV is <const>
---
lparser.c | 1 +
testes/attrib.lua | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/lparser.c b/lparser.c
index 3abe3d751..a5cd55257 100644
--- a/src/lparser.c
+++ b/src/lparser.c
@@ -468,6 +468,7 @@ static void singlevar (LexState *ls, expdesc *var) {
expdesc key;
singlevaraux(fs, ls->envn, var, 1); /* get environment variable */
lua_assert(var->k != VVOID); /* this one must exist */
+ luaK_exp2anyregup(fs, var); /* but could be a constant */
codestring(&key, varname); /* key is variable name */
luaK_indexed(fs, var, &key); /* env[varname] */
}