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fix two potential cases of signed integer overflow

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This commit is contained in:
cremno
2015-06-01 13:23:43 +02:00
parent bd2686d82d
commit dc0e335664
1 changed files with 6 additions and 1 deletions
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src/array.c
+6 -1
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@@ -298,6 +298,9 @@ mrb_ary_plus(mrb_state *mrb, mrb_value self)
mrb_int blen;
mrb_get_args(mrb, "a", &ptr, &blen);
if (ARY_MAX_SIZE - blen < a1->len) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big");
}
ary = mrb_ary_new_capa(mrb, a1->len + blen);
a2 = mrb_ary_ptr(ary);
array_copy(a2->ptr, a1->ptr, a1->len);
@@ -351,7 +354,9 @@ mrb_ary_times(mrb_state *mrb, mrb_value self)
mrb_raise(mrb, E_ARGUMENT_ERROR, "negative argument");
}
if (times == 0) return mrb_ary_new(mrb);
if (ARY_MAX_SIZE / times < a1->len) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "array size too big");
}
ary = mrb_ary_new_capa(mrb, a1->len * times);
a2 = mrb_ary_ptr(ary);
ptr = a2->ptr;