1/* Test for integer/buffer overflow in strtod.
2 Copyright (C) 2012-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <support/blob_repeat.h>
23#include <support/test-driver.h>
24
25#define EXPONENT "e-2147483649"
26#define SIZE 214748364
27
28static int
29do_test (void)
30{
31 struct support_blob_repeat repeat = support_blob_repeat_allocate
32 (element: "0", element_size: 1, count: 1 + SIZE + sizeof (EXPONENT));
33 if (repeat.size == 0)
34 {
35 puts (s: "warning: memory allocation failed, cannot test for overflow");
36 return EXIT_UNSUPPORTED;
37 }
38 char *p = repeat.start;
39 p[0] = '1';
40 memcpy (p + 1 + SIZE, EXPONENT, sizeof (EXPONENT));
41 double d = strtod (p, NULL);
42 if (d != 0)
43 {
44 printf (format: "error: strtod returned wrong value: %a\n", d);
45 return 1;
46 }
47 support_blob_repeat_free (&repeat);
48 return 0;
49}
50
51#define TEST_FUNCTION do_test ()
52#define TIMEOUT 30
53#include "../test-skeleton.c"
54

source code of glibc/stdlib/tst-strtod-overflow.c