1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 200i1
4 * Copyright (c) 2018 Xiao Yang <yangx.jy@cn.fujitsu.com>
5 */
6
7 /*
8 * DESCRIPTION
9 * 1) Call sysctl(2) with nlen set to 0, and expect ENOTDIR.
10 * 2) Call sysctl(2) with nlen greater than CTL_MAXNAME, and expect ENOTDIR.
11 * 3) Call sysctl(2) with the address of oldname outside the address space of
12 * the process, and expect EFAULT.
13 * 4) Call sysctl(2) with the address of soldval outside the address space of
14 * the process, and expect EFAULT.
15 */
16
17 #include <stdio.h>
18 #include <errno.h>
19 #include <unistd.h>
20 #include <linux/unistd.h>
21 #include <linux/sysctl.h>
22
23 #include "tst_test.h"
24 #include "lapi/syscalls.h"
25
26 static char osname[BUFSIZ];
27 static size_t length = BUFSIZ;
28
29 static struct tcase {
30 int name[2];
31 int nlen;
32 void *oldval;
33 size_t *oldlen;
34 int exp_err;
35 } tcases[] = {
36 {{CTL_KERN, KERN_OSREV}, 0, osname, &length, ENOTDIR},
37 {{CTL_KERN, KERN_OSREV}, CTL_MAXNAME + 1, osname, &length, ENOTDIR},
38 {{CTL_KERN, KERN_OSRELEASE}, 2, (void *) -1, &length, EFAULT},
39 {{CTL_KERN, KERN_VERSION}, 2, osname, (void *) -1, EFAULT},
40 };
41
verify_sysctl(unsigned int n)42 static void verify_sysctl(unsigned int n)
43 {
44 struct tcase *tc = &tcases[n];
45 struct __sysctl_args args = {
46 .name = tc->name,
47 .nlen = tc->nlen,
48 .oldval = tc->oldval,
49 .oldlenp = tc->oldlen,
50 };
51
52 TEST(tst_syscall(__NR__sysctl, &args));
53 if (TST_RET != -1) {
54 tst_res(TFAIL, "sysctl(2) succeeded unexpectedly");
55 return;
56 }
57
58 if (TST_ERR == tc->exp_err) {
59 tst_res(TPASS | TTERRNO, "Got expected error");
60 } else {
61 tst_res(TFAIL | TTERRNO, "Got unexpected error, expected %s",
62 tst_strerrno(tc->exp_err));
63 }
64 }
65
66 static struct tst_test test = {
67 .tcnt = ARRAY_SIZE(tcases),
68 .test = verify_sysctl,
69 };
70