1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2020 Viresh Kumar <viresh.kumar@linaro.org>
4 *
5 * Basic clone3() test to check various failures.
6 */
7 #define _GNU_SOURCE
8
9 #include <stdlib.h>
10
11 #include "tst_test.h"
12 #include "lapi/clone.h"
13
14 static struct clone_args *valid_args, *invalid_args;
15 unsigned long stack;
16 static int *invalid_address;
17
18 static struct tcase {
19 const char *name;
20 struct clone_args **args;
21 size_t size;
22 uint64_t flags;
23 int **pidfd;
24 int **child_tid;
25 int **parent_tid;
26 int exit_signal;
27 unsigned long stack;
28 unsigned long stack_size;
29 unsigned long tls;
30 int exp_errno;
31 } tcases[] = {
32 {"invalid args", &invalid_args, sizeof(*valid_args), 0, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EFAULT},
33 {"zero size", &valid_args, 0, 0, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EINVAL},
34 {"short size", &valid_args, sizeof(*valid_args) - 1, 0, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EINVAL},
35 {"extra size", &valid_args, sizeof(*valid_args) + 1, 0, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EFAULT},
36 {"sighand-no-VM", &valid_args, sizeof(*valid_args), CLONE_SIGHAND, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EINVAL},
37 {"thread-no-sighand", &valid_args, sizeof(*valid_args), CLONE_THREAD, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EINVAL},
38 {"fs-newns", &valid_args, sizeof(*valid_args), CLONE_FS | CLONE_NEWNS, NULL, NULL, NULL, SIGCHLD, 0, 0, 0, EINVAL},
39 {"invalid pidfd", &valid_args, sizeof(*valid_args), CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_PIDFD, &invalid_address, NULL, NULL, SIGCHLD, 0, 0, 0, EFAULT},
40 {"invalid childtid", &valid_args, sizeof(*valid_args), CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_PIDFD, NULL, &invalid_address, NULL, SIGCHLD, 0, 0, 0, EFAULT},
41 {"invalid parenttid", &valid_args, sizeof(*valid_args), CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_PIDFD, NULL, NULL, &invalid_address, SIGCHLD, 0, 0, 0, EFAULT},
42 {"invalid signal", &valid_args, sizeof(*valid_args), 0, NULL, NULL, NULL, CSIGNAL + 1, 0, 0, 0, EINVAL},
43 {"zero-stack-size", &valid_args, sizeof(*valid_args), 0, NULL, NULL, NULL, SIGCHLD, (unsigned long)&stack, 0, 0, EINVAL},
44 {"invalid-stack", &valid_args, sizeof(*valid_args), 0, NULL, NULL, NULL, SIGCHLD, 0, 4, 0, EINVAL},
45 };
46
setup(void)47 static void setup(void)
48 {
49 clone3_supported_by_kernel();
50
51 void *p = tst_get_bad_addr(NULL);
52
53 invalid_args = p;
54 invalid_address = p;
55 }
56
run(unsigned int n)57 static void run(unsigned int n)
58 {
59 struct tcase *tc = &tcases[n];
60 struct clone_args *args = *tc->args;
61
62 if (args == valid_args) {
63 args->flags = tc->flags;
64 if (tc->pidfd)
65 args->pidfd = (uint64_t)(*tc->pidfd);
66 if (tc->child_tid)
67 args->child_tid = (uint64_t)(*tc->child_tid);
68 if (tc->parent_tid)
69 args->parent_tid = (uint64_t)(*tc->parent_tid);
70 args->exit_signal = tc->exit_signal;
71 args->stack = tc->stack;
72 args->stack_size = tc->stack_size;
73 args->tls = tc->tls;
74 }
75
76 TEST(clone3(args, tc->size));
77
78 if (!TST_RET)
79 exit(EXIT_SUCCESS);
80
81 if (TST_RET >= 0) {
82 tst_res(TFAIL, "%s: clone3() passed unexpectedly", tc->name);
83 return;
84 }
85
86 if (tc->exp_errno != TST_ERR) {
87 tst_res(TFAIL | TTERRNO, "%s: clone3() should fail with %s",
88 tc->name, tst_strerrno(tc->exp_errno));
89 return;
90 }
91
92 tst_res(TPASS | TTERRNO, "%s: clone3() failed as expected", tc->name);
93 }
94
95 static struct tst_test test = {
96 .tcnt = ARRAY_SIZE(tcases),
97 .test = run,
98 .setup = setup,
99 .needs_tmpdir = 1,
100 .bufs = (struct tst_buffers []) {
101 {&valid_args, .size = sizeof(*valid_args)},
102 {},
103 }
104 };
105