Check division overflow (`MRB_INT_MIN` and `-1`).

5abb283d · Yukihiro "Matz" Matsumoto · 1f125251 · 5abb283d
Unverified Commit 5abb283d authored Nov 17, 2020 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-rational/src/rational.c mrbgems/mruby-rational/src/rational.c +3 -0

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--- a/mrbgems/mruby-rational/src/rational.c
+++ b/mrbgems/mruby-rational/src/rational.c
@@ -236,6 +236,9 @@ rational_m_int(mrb_state *mrb, mrb_int n, mrb_int d)
    b = a % b;
    a = tmp;
  }
+  if ((n == MRB_INT_MIN || d == MRB_INT_MIN) && a == -1) {
+    mrb_raise(mrb, E_RANGE_ERROR, "integer overflow in rational");
+  }
  return rational_new(mrb, n/a, d/a);
 }