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
|
/*
* Check decoding of seccomp SECCOMP_GET_ACTION_AVAIL.
*
* Copyright (c) 2017-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <linux/seccomp.h>
static const char *errstr;
static long
k_seccomp(const kernel_ulong_t op, const kernel_ulong_t flags,
const kernel_ulong_t args)
{
const long rc = syscall(__NR_seccomp, op, flags, args);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
TAIL_ALLOC_OBJECT_CONST_PTR(uint32_t, act);
kernel_ulong_t op = (kernel_ulong_t) 0xfacefeed00000000ULL
| SECCOMP_GET_ACTION_AVAIL;
kernel_ulong_t flags = (kernel_ulong_t) 0xdeadbeef00000000ULL;
struct {
uint32_t val;
const char *str;
} actions [] = {
{ 0, "SECCOMP_RET_KILL_THREAD" },
{ ARG_STR(SECCOMP_RET_KILL_PROCESS) },
{ ARG_STR(SECCOMP_RET_TRAP) },
{ ARG_STR(SECCOMP_RET_ERRNO) },
{ ARG_STR(SECCOMP_RET_USER_NOTIF) },
{ ARG_STR(SECCOMP_RET_TRACE) },
{ ARG_STR(SECCOMP_RET_LOG) },
{ ARG_STR(SECCOMP_RET_ALLOW) },
{ 0xffffffff, "0xffffffff /* SECCOMP_RET_??? */" }
};
for (unsigned int i = 0; i < ARRAY_SIZE(actions); ++i) {
*act = actions[i].val;
k_seccomp(op, flags, (uintptr_t) act);
printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, [%s]) = %s\n",
actions[i].str, errstr);
}
*act = actions[0].val;
k_seccomp(op, flags, (uintptr_t) (act + 1));
printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %p) = %s\n",
act + 1, errstr);
if (F8ILL_KULONG_SUPPORTED) {
k_seccomp(op, flags, f8ill_ptr_to_kulong(act));
printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %#jx) = %s\n",
(uintmax_t) f8ill_ptr_to_kulong(act), errstr);
}
flags |= 0xcafef00d;
k_seccomp(op, flags, 0);
printf("seccomp(SECCOMP_GET_ACTION_AVAIL, %#x, NULL) = %s\n",
(unsigned int) flags, errstr);
puts("+++ exited with 0 +++");
return 0;
}
|
