1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) Wipro Technologies Ltd, 2003. All Rights Reserved.
4 *
5 * Author: Aniruddha Marathe <aniruddha.marathe@wipro.com>
6 *
7 * Ported to new library:
8 * 07/2019 Christian Amann <camann@suse.com>
9 */
10 /*
11 * This tests basic error handling of the timer_settime(2) syscall:
12 *
13 * 1) Setting pointer to new settings to NULL -> EINVAL
14 * 2) Setting tv_nsec of the itimerspec structure to a negative value
15 * -> EINVAL
16 * 3) Setting tv_nsec of the itimerspec structure to something larger
17 * than NSEC_PER_SEC -> EINVAL
18 * 4) Passing an invalid timer -> EINVAL
19 * 5) Passing an invalid address for new_value -> EFAULT
20 * 6) Passing an invalid address for old_value -> EFAULT
21 *
22 * This is also regression test for commit:
23 * f18ddc13af98 ("alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP")
24 */
25
26 #include <errno.h>
27 #include <time.h>
28 #include "time64_variants.h"
29 #include "tst_timer.h"
30
31 static struct tst_its new_set, old_set;
32 static struct tst_its *pnew_set = &new_set, *pold_set = &old_set, *null_set = NULL;
33 static void *faulty_set;
34 static kernel_timer_t timer;
35 static kernel_timer_t timer_inval = (kernel_timer_t)-1;
36
37 /* separate description-array to (hopefully) improve readability */
38 static const char * const descriptions[] = {
39 "setting new_set pointer to NULL",
40 "setting tv_nsec to a negative value",
41 "setting tv_nsec value too high",
42 "passing pointer to invalid timer_id",
43 "passing invalid address for new_value",
44 "passing invalid address for old_value",
45 };
46
47 static struct testcase {
48 kernel_timer_t *timer_id;
49 struct tst_its **new_ptr;
50 struct tst_its **old_ptr;
51 int it_value_tv_nsec;
52 int error;
53 } tcases[] = {
54 {&timer, &null_set, &pold_set, 0, EINVAL},
55 {&timer, &pnew_set, &pold_set, -1, EINVAL},
56 {&timer, &pnew_set, &pold_set, NSEC_PER_SEC + 1, EINVAL},
57 {&timer_inval, &pnew_set, &pold_set, 0, EINVAL},
58 {&timer, (struct tst_its **)&faulty_set, &pold_set, 0, EFAULT},
59 {&timer, &pnew_set, (struct tst_its **)&faulty_set, 0, EFAULT},
60 };
61
62 static struct time64_variants variants[] = {
63 #if (__NR_timer_settime != __LTP__NR_INVALID_SYSCALL)
64 { .timer_settime = sys_timer_settime, .ts_type = TST_KERN_OLD_TIMESPEC, .desc = "syscall with old kernel spec"},
65 #endif
66
67 #if (__NR_timer_settime64 != __LTP__NR_INVALID_SYSCALL)
68 { .timer_settime = sys_timer_settime64, .ts_type = TST_KERN_TIMESPEC, .desc = "syscall time64 with kernel spec"},
69 #endif
70 };
71
setup(void)72 static void setup(void)
73 {
74 tst_res(TINFO, "Testing variant: %s", variants[tst_variant].desc);
75 faulty_set = tst_get_bad_addr(NULL);
76 }
77
run(unsigned int n)78 static void run(unsigned int n)
79 {
80 struct time64_variants *tv = &variants[tst_variant];
81 struct testcase *tc = &tcases[n];
82 void *new, *old;
83 unsigned int i;
84
85 tst_res(TINFO, "Testing for %s:", descriptions[n]);
86
87 for (i = 0; i < CLOCKS_DEFINED; ++i) {
88 clock_t clock = clock_list[i];
89
90 if (clock == CLOCK_PROCESS_CPUTIME_ID ||
91 clock == CLOCK_THREAD_CPUTIME_ID) {
92 if (!have_cputime_timers())
93 continue;
94 }
95
96 /* Init temporary timer */
97 TEST(tst_syscall(__NR_timer_create, clock, NULL, &timer));
98 if (TST_RET != 0) {
99 if (possibly_unsupported(clock) &&
100 (TST_ERR == EINVAL || TST_ERR == ENOTSUP)) {
101 tst_res(TCONF | TTERRNO, "%s unsupported",
102 get_clock_str(clock));
103 } else {
104 tst_res(TFAIL | TTERRNO,
105 "timer_create(%s) failed",
106 get_clock_str(clock));
107 }
108 continue;
109 }
110
111 memset(&new_set, 0, sizeof(new_set));
112 memset(&old_set, 0, sizeof(old_set));
113
114 new_set.type = old_set.type = tv->ts_type;
115 tst_its_set_interval_sec(&new_set, 0);
116 tst_its_set_interval_nsec(&new_set, 0);
117 tst_its_set_value_sec(&new_set, 5);
118 tst_its_set_value_nsec(&new_set, tc->it_value_tv_nsec);
119
120 new = (tc->new_ptr == (struct tst_its **)&faulty_set) ? faulty_set : tst_its_get(*tc->new_ptr);
121 old = (tc->old_ptr == (struct tst_its **)&faulty_set) ? faulty_set : tst_its_get(*tc->old_ptr);
122
123 TEST(tv->timer_settime(*tc->timer_id, 0, new, old));
124
125 if (tc->error != TST_ERR) {
126 tst_res(TFAIL | TTERRNO,
127 "%s didn't fail as expected. Expected: %s - Got",
128 get_clock_str(clock),
129 tst_strerrno(tc->error));
130 } else {
131 tst_res(TPASS | TTERRNO,
132 "%s failed as expected",
133 get_clock_str(clock));
134 }
135
136 /* Delete temporary timer */
137 TEST(tst_syscall(__NR_timer_delete, timer));
138 if (TST_RET != 0)
139 tst_res(TFAIL | TTERRNO, "timer_delete() failed!");
140 }
141 }
142
143 static struct tst_test test = {
144 .test = run,
145 .needs_root = 1,
146 .tcnt = ARRAY_SIZE(tcases),
147 .test_variants = ARRAY_SIZE(variants),
148 .setup = setup,
149 .tags = (const struct tst_tag[]) {
150 {"linux-git", "f18ddc13af98"},
151 {}
152 }
153 };
154