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FFI: Fix pragma push stack limit check and throw on overflow.

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Reported by Sergey Kaplun. #1114
This commit is contained in:
Mike Pall 2023-11-07 22:25:42 +01:00
parent d133d67c88
commit 433d7e8d8d
1 changed files with 3 additions and 1 deletions
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4
src/lj_cparse.c
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@ -1747,9 +1747,11 @@ static void cp_pragma(CPState *cp, BCLine pragmaline)
cp_check(cp, '('); cp_check(cp, '(');
if (cp->tok == CTOK_IDENT) { if (cp->tok == CTOK_IDENT) {
if (cp->str->hash == H_(738e923c,a1b65954)) { /* push */ if (cp->str->hash == H_(738e923c,a1b65954)) { /* push */
if (cp->curpack < CPARSE_MAX_PACKSTACK) { if (cp->curpack < CPARSE_MAX_PACKSTACK-1) {
cp->packstack[cp->curpack+1] = cp->packstack[cp->curpack]; cp->packstack[cp->curpack+1] = cp->packstack[cp->curpack];
cp->curpack++; cp->curpack++;
} else {
cp_errmsg(cp, cp->tok, LJ_ERR_XLEVELS);
} }
} else if (cp->str->hash == H_(6c71cf27,6c71cf27)) { /* pop */ } else if (cp->str->hash == H_(6c71cf27,6c71cf27)) { /* pop */
if (cp->curpack > 0) cp->curpack--; if (cp->curpack > 0) cp->curpack--;