Language: C
Label: vulnerable
CWE: CWE-190 \u2014 Integer Overflow or Wraparound
The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.

Code:
int util(void) {
	int l, code = RLC_ERR;
	gt_t a, b, c;
	uint8_t bin[24 * RLC_PC_BYTES];

	gt_null(a);
	gt_null(b);
	gt_null(c);

	RLC_TRY {
		gt_new(a);
		gt_new(b);
		gt_new(c);

		TEST_CASE("comparison is consistent") {
			gt_rand(a);
			gt_rand(b);
			TEST_ASSERT(gt_cmp(a, b) != RLC_EQ, end);
		}
		TEST_END;

		TEST_CASE("copy and comparison are consistent") {
			gt_rand(a);
			gt_rand(b);
			gt_rand(c);
			if (gt_cmp(a, c) != RLC_EQ) {
				gt_copy(c, a);
				TEST_ASSERT(gt_cmp(c, a) == RLC_EQ, end);
			}
			if (gt_cmp(b, c) != RLC_EQ) {
				gt_copy(c, b);
				TEST_ASSERT(gt_cmp(b, c) == RLC_EQ, end);
			}
		}
		TEST_END;

		TEST_CASE("inversion and comparison are consistent") {
			gt_rand(a);
			gt_inv(b, a);
			TEST_ASSERT(gt_cmp(a, b) != RLC_EQ, end);
		}
		TEST_END;

		TEST_CASE
				("assignment to random/infinity and comparison are consistent")
		{
			gt_rand(a);
			gt_set_unity(c);
			TEST_ASSERT(gt_cmp(a, c) != RLC_EQ, end);
			TEST_ASSERT(gt_cmp(c, a) != RLC_EQ, end);
		}
		TEST_END;

		TEST_CASE("assignment to unity and unity test are consistent") {
			gt_set_unity(a);
			TEST_ASSERT(gt_is_unity(a), end);
		}
		TEST_END;
	}
	RLC_CATCH_ANY {
		util_print("FATAL ERROR!\n");
		RLC_ERROR(end);
	}
	code = RLC_OK;
  end:
	gt_free(a);
	gt_free(b);
	gt_free(c);
	return code;
}