1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
* Check decoding of PERF_EVENT_IOC_* commands of ioctl syscall.
*
* Copyright (c) 2018-2024 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/perf_event.h>
#define STR16 "0123456789abcdef"
static long
sys_ioctl(kernel_long_t fd, kernel_ulong_t cmd, kernel_ulong_t arg)
{
return syscall(__NR_ioctl, fd, cmd, arg);
}
int
main(void)
{
static const kernel_ulong_t unknown_perf_cmd =
(kernel_ulong_t) 0xbadc0dedfeed24edULL;
static const kernel_ulong_t magic =
(kernel_ulong_t) 0xdeadbeefbadc0dedULL;
static const uint64_t magic64 = 0xfacefeeddeadc0deULL;
static const char str[] = STR16 STR16 STR16 STR16;
static struct {
unsigned int cmd;
const char *str;
} flag_iocs[] = {
{ ARG_STR(PERF_EVENT_IOC_ENABLE) },
{ ARG_STR(PERF_EVENT_IOC_DISABLE) },
{ ARG_STR(PERF_EVENT_IOC_RESET) },
};
TAIL_ALLOC_OBJECT_CONST_PTR(uint64_t, u64_ptr);
uint64_t *const u64_efault = u64_ptr + 1;
TAIL_ALLOC_OBJECT_CONST_ARR(uint32_t, u32_arr, 4);
uint32_t *const u32_efault = u32_arr + 4;
char *const str_ptr = tail_memdup(str, sizeof(str));
char *const str_efault = str_ptr + sizeof(str);
TAIL_ALLOC_OBJECT_CONST_PTR(struct perf_event_attr, pea_ptr);
*u64_ptr = magic64;
fill_memory_ex(pea_ptr, sizeof(*pea_ptr), 0xaa, 0x55);
/* Unknown perf commands */
sys_ioctl(-1, unknown_perf_cmd, magic);
printf("ioctl(-1, _IOC(%s_IOC_READ|_IOC_WRITE, 0x24, %#x, %#x), %#lx)"
RVAL_EBADF,
_IOC_DIR((unsigned int) unknown_perf_cmd) & _IOC_NONE ?
"_IOC_NONE|" : "",
_IOC_NR((unsigned int) unknown_perf_cmd),
_IOC_SIZE((unsigned int) unknown_perf_cmd),
(unsigned long) magic);
sys_ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES + 1, magic);
printf("ioctl(-1, _IOC(_IOC_WRITE, 0x24, %#x, %#x), %#lx)" RVAL_EBADF,
(unsigned int) _IOC_NR(PERF_EVENT_IOC_MODIFY_ATTRIBUTES + 1),
(unsigned int) _IOC_SIZE(PERF_EVENT_IOC_MODIFY_ATTRIBUTES + 1),
(unsigned long) magic);
/* PERF_EVENT_IOC_{ENABLE,DISABLE,RESET} */
for (unsigned i = 0; i < ARRAY_SIZE(flag_iocs); i++) {
ioctl(-1, flag_iocs[i].cmd, 0);
printf("ioctl(-1, %s, 0)" RVAL_EBADF, flag_iocs[i].str);
ioctl(-1, flag_iocs[i].cmd, 1);
printf("ioctl(-1, %s, PERF_IOC_FLAG_GROUP)" RVAL_EBADF,
flag_iocs[i].str);
ioctl(-1, flag_iocs[i].cmd, 2);
printf("ioctl(-1, %s, 0x2 /* PERF_IOC_FLAG_??? */)" RVAL_EBADF,
flag_iocs[i].str);
sys_ioctl(-1, flag_iocs[i].cmd, magic);
printf("ioctl(-1, %s, PERF_IOC_FLAG_GROUP|%#x)" RVAL_EBADF,
flag_iocs[i].str, (unsigned int) magic & ~1U);
}
/* PERF_EVENT_IOC_REFRESH */
sys_ioctl(-1, PERF_EVENT_IOC_REFRESH, magic);
printf("ioctl(-1, PERF_EVENT_IOC_REFRESH, %d)" RVAL_EBADF,
(int) magic);
/* PERF_EVENT_IOC_PERIOD */
ioctl(-1, PERF_EVENT_IOC_PERIOD, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_PERIOD, NULL)" RVAL_EBADF);
ioctl(-1, PERF_EVENT_IOC_PERIOD, u64_efault);
printf("ioctl(-1, PERF_EVENT_IOC_PERIOD, %p)" RVAL_EBADF,
u64_efault);
ioctl(-1, PERF_EVENT_IOC_PERIOD, u64_ptr);
printf("ioctl(-1, PERF_EVENT_IOC_PERIOD, [%" PRIu64 "])" RVAL_EBADF,
magic64);
/* PERF_EVENT_IOC_SET_OUTPUT */
sys_ioctl(-1, PERF_EVENT_IOC_SET_OUTPUT, magic);
printf("ioctl(-1, PERF_EVENT_IOC_SET_OUTPUT, %d)" RVAL_EBADF,
(int) magic);
/* PERF_EVENT_IOC_SET_FILTER */
ioctl(-1, PERF_EVENT_IOC_SET_FILTER, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_SET_FILTER, NULL)" RVAL_EBADF);
ioctl(-1, PERF_EVENT_IOC_SET_FILTER, str_efault);
printf("ioctl(-1, PERF_EVENT_IOC_SET_FILTER, %p)" RVAL_EBADF,
str_efault);
ioctl(-1, PERF_EVENT_IOC_SET_FILTER, str_ptr);
printf("ioctl(-1, PERF_EVENT_IOC_SET_FILTER, \"%.32s\"...)" RVAL_EBADF,
str_ptr);
ioctl(-1, PERF_EVENT_IOC_SET_FILTER, str_ptr + 40);
printf("ioctl(-1, PERF_EVENT_IOC_SET_FILTER, \"%.32s\")" RVAL_EBADF,
str_ptr + 40);
str_ptr[sizeof(str) - 1] = '0';
ioctl(-1, PERF_EVENT_IOC_SET_FILTER, str_ptr + 40);
printf("ioctl(-1, PERF_EVENT_IOC_SET_FILTER, %p)" RVAL_EBADF,
str_ptr + 40);
/* PERF_EVENT_IOC_ID */
ioctl(-1, PERF_EVENT_IOC_ID, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_ID, NULL)" RVAL_EBADF);
ioctl(-1, PERF_EVENT_IOC_ID, u64_efault);
printf("ioctl(-1, PERF_EVENT_IOC_ID, %p)" RVAL_EBADF,
u64_efault);
ioctl(-1, PERF_EVENT_IOC_ID, u64_ptr);
printf("ioctl(-1, PERF_EVENT_IOC_ID, %p)" RVAL_EBADF,
u64_ptr);
/* PERF_EVENT_IOC_SET_BPF */
sys_ioctl(-1, PERF_EVENT_IOC_SET_BPF, magic);
printf("ioctl(-1, PERF_EVENT_IOC_SET_BPF, %d)" RVAL_EBADF,
(int) magic);
/* PERF_EVENT_IOC_PAUSE_OUTPUT */
sys_ioctl(-1, PERF_EVENT_IOC_PAUSE_OUTPUT, magic);
printf("ioctl(-1, PERF_EVENT_IOC_PAUSE_OUTPUT, %lu)" RVAL_EBADF,
(unsigned long) magic);
/* PERF_EVENT_IOC_QUERY_BPF */
ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, NULL)" RVAL_EBADF);
ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_efault);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, %p)" RVAL_EBADF,
u32_efault);
u32_arr[0] = 0xbadc0ded;
ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_arr);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, {ids_len=3134983661, ...})"
RVAL_EBADF);
/* PERF_EVENT_IOC_MODIFY_ATTRIBUTES */
ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, NULL)" RVAL_EBADF);
ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, pea_ptr + 1);
printf("ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, %p)" RVAL_EBADF,
pea_ptr + 1);
printf("ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES"
", {type=%#x /* PERF_TYPE_??? */"
", size=%#x /* PERF_ATTR_SIZE_??? */"
", config=%#llx, sample_period=%llu%s, ...})" RVAL_EBADF,
(unsigned int) pea_ptr->type,
(unsigned int) pea_ptr->size,
(unsigned long long) pea_ptr->config,
(unsigned long long) pea_ptr->sample_period,
#ifdef WORDS_BIGENDIAN
", sample_type=PERF_SAMPLE_IP|PERF_SAMPLE_ADDR|PERF_SAMPLE_ID|"
"PERF_SAMPLE_CPU|PERF_SAMPLE_BRANCH_STACK|PERF_SAMPLE_WEIGHT|"
"PERF_SAMPLE_DATA_SRC|PERF_SAMPLE_IDENTIFIER|"
"PERF_SAMPLE_TRANSACTION|PERF_SAMPLE_REGS_INTR|"
"PERF_SAMPLE_DATA_PAGE_SIZE|PERF_SAMPLE_CODE_PAGE_SIZE|"
"0xc2c3c4c5c6000000"
", read_format=PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_LOST|"
"0xcacbcccdcecfd0c0"
", disabled=1, inherit=1, exclusive=1, exclude_hv=1, mmap=1"
", comm=1, inherit_stat=1, watermark=1"
", precise_ip=3 /* must have 0 skid */, mmap_data=1"
", exclude_host=1, exclude_callchain_kernel=1, comm_exec=1"
", use_clockid=1, write_backward=1, ksymbol=1, aux_output=1"
", cgroup=1, text_poke=1, inherit_thread=1, sigtrap=1"
", __reserved_1=0x2d7d8d9 /* Bits 63..38 */"
#else
", sample_type=PERF_SAMPLE_TID|PERF_SAMPLE_ID|PERF_SAMPLE_CPU|"
"PERF_SAMPLE_PERIOD|PERF_SAMPLE_STREAM_ID|PERF_SAMPLE_WEIGHT|"
"PERF_SAMPLE_DATA_SRC|PERF_SAMPLE_REGS_INTR|"
"PERF_SAMPLE_DATA_PAGE_SIZE|PERF_SAMPLE_CODE_PAGE_SIZE|"
"PERF_SAMPLE_WEIGHT_STRUCT|0xc9c8c7c6c4000000"
", read_format=PERF_FORMAT_TOTAL_TIME_RUNNING|PERF_FORMAT_GROUP|"
"0xd1d0cfcecdcccbc0"
", inherit=1, exclude_user=1, exclude_hv=1, exclude_idle=1"
", mmap=1, comm=1, enable_on_exec=1, watermark=1"
", precise_ip=1 /* constant skid */, sample_id_all=1"
", exclude_guest=1, exclude_callchain_user=1, mmap2=1"
", comm_exec=1, context_switch=1, namespaces=1, bpf_event=1"
", aux_output=1, text_poke=1, build_id=1, remove_on_exec=1"
", __reserved_1=0x367635f /* Bits 63..38 */"
#endif
);
ioctl(-1, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, pea_ptr);
puts("+++ exited with 0 +++");
return 0;
}
|
