Add exprLevel maximum for expression suffices as well

tdewolff · Apr 26, 2021 · ef4f18b · ef4f18b
1 parent 8c2ea15
commit ef4f18b
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/js/parse.go b/js/parse.go
@@ -1728,7 +1728,12 @@ func (p *Parser) parseExpression(prec OpPrec) IExpr {
 }
 
 func (p *Parser) parseExpressionSuffix(left IExpr, prec, precLeft OpPrec) IExpr {
-	for {
+	for i := 0; ; i++ {
+		if 1000 < p.exprLevel+i {
+			p.failMessage("too many nested expressions")
+			return nil
+		}
+
 		switch tt := p.tt; tt {
 		case EqToken, MulEqToken, DivEqToken, ModEqToken, ExpEqToken, AddEqToken, SubEqToken, LtLtEqToken, GtGtEqToken, GtGtGtEqToken, BitAndEqToken, BitXorEqToken, BitOrEqToken, AndEqToken, OrEqToken, NullishEqToken:
 			if OpAssign < prec {