From 9cb44f5ae3bf36aa0c13a02b26a12217f5e6fc87 Mon Sep 17 00:00:00 2001 From: "Yukihiro \"Matz\" Matsumoto" Date: Wed, 4 Aug 2021 12:25:14 +0900 Subject: codegen.c: detect integer overflow in division. `MRB_INT_MIN / -1` overflows. --- mrbgems/mruby-compiler/core/codegen.c | 1 + 1 file changed, 1 insertion(+) (limited to 'mrbgems/mruby-compiler/core/codegen.c') diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c index 4dfe07faf..9915440dd 100644 --- a/mrbgems/mruby-compiler/core/codegen.c +++ b/mrbgems/mruby-compiler/core/codegen.c @@ -791,6 +791,7 @@ gen_muldiv(codegen_scope *s, uint8_t op, uint16_t dst) if (mrb_int_mul_overflow(n0, n, &n)) goto normal; } else { /* OP_DIV */ + if (n0 == MRB_INT_MIN && n == -1) goto normal; n = n0 / n; } s->pc = addr_pc(s, data0.addr); -- cgit v1.2.3