You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
1.1 KiB
31 lines
1.1 KiB
3 years ago
|
From a585eae6e7ada1ca9271607a4f48dfb17868ab7b Mon Sep 17 00:00:00 2001
|
||
|
|
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
|
||
|
|
Date: Mon, 27 Jul 2020 12:01:38 -0300
|
||
|
|
Subject: [PATCH] Fixed bug: Negation overflow in getlocal/setlocal
|
||
|
|
|
||
|
|
Adjusted for 5.3
|
||
|
|
|
||
|
|
---
|
||
|
|
diff --git a/src/ldebug.c b/src/ldebug.c
|
||
|
|
index f1835890..a44e5439 100644
|
||
|
|
--- a/src/ldebug.c
|
||
|
|
+++ b/src/ldebug.c
|
||
|
|
@@ -133,7 +133,7 @@ static const char *upvalname (Proto *p, int uv) {
|
||
|
|
|
||
|
|
static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
|
||
|
|
int nparams = clLvalue(ci->func)->p->numparams;
|
||
|
|
- if (n >= cast_int(ci->u.l.base - ci->func) - nparams)
|
||
|
|
+ if (n < cast_int(ci->u.l.base - ci->func) - nparams) /* 'n' is negative */
|
||
|
|
return NULL; /* no such vararg */
|
||
|
|
else {
|
||
|
|
*pos = ci->func + nparams + n;
|
||
|
|
@@ -148,7 +148,7 @@ static const char *findlocal (lua_State *L, CallInfo *ci, int n,
|
||
|
|
StkId base;
|
||
|
|
if (isLua(ci)) {
|
||
|
|
if (n < 0) /* access to vararg values? */
|
||
|
|
- return findvararg(ci, -n, pos);
|
||
|
|
+ return findvararg(ci, n, pos);
|
||
|
|
else {
|
||
|
|
base = ci->u.l.base;
|
||
|
|
name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
|