Avoid integer overflow in `rational_new`.
MODIFY
mrbgems/mruby-rational/src/rational.c
mrbgems/mruby-rational/src/rational.c
@@ -77,6 +77,9 @@ rational_new(mrb_state *mrb, mrb_int numerator, mrb_int denominator)
struct mrb_rational *p;
struct RBasic *rat = rational_alloc(mrb, c, &p);
if (denominator < 0) {
+ if (numerator == MRB_INT_MIN || denominator == MRB_INT_MIN) {
+ mrb_raise(mrb, E_RANGE_ERROR, "integer overflow in rational");
+ }
numerator *= -1;
denominator *= -1;
}
@@ -115,6 +118,9 @@ rational_new_f(mrb_state *mrb, mrb_float f0)
if (f < 0) { neg = 1; f = -f; }
while (f != floor(f)) { n <<= 1; f *= 2; }
+ if (!TYPED_FIXABLE(f, rat_float)) {
+ mrb_raise(mrb, E_RANGE_ERROR, "integer overflow in rational");
+ }
d = (mrb_int)f;
/* continued fraction and check denominator each step */

Avoid integer overflow in `rational_new`.