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Backport Lua 5.2.2 stack overflow fix. (#7733)

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This fixes the issue described in CVE-2014-5461. At this time we cannot
confirm that the original issue has a real impact on Redis, but it is
included as an extra safety measure.

(cherry picked from commit 374270d3a04e8b224a12655518c815497aeb497d)
This commit is contained in:
Yossi Gottlieb 2020-08-31 20:42:46 +03:00 committed by Oran Agra
parent 6c68ac1d4c
commit f2ab7ac5d7
1 changed files with 1 additions and 1 deletions
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2
deps/lua/src/ldo.c vendored
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@ -274,7 +274,7 @@ int luaD_precall (lua_State *L, StkId func, int nresults) {
CallInfo *ci;
StkId st, base;
Proto *p = cl->p;
luaD_checkstack(L, p->maxstacksize);
luaD_checkstack(L, p->maxstacksize + p->numparams);
func = restorestack(L, funcr);
if (!p->is_vararg) { /* no varargs? */
base = func + 1;