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
|
/*
* Check decoding of prctl PR_PAC_RESET_KEYS operation.
*
* Copyright (c) 2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/prctl.h>
#include "xlat.h"
#include "xlat/pr_pac_enabled_keys.h"
#ifdef INJECT_RETVAL
# define INJ_STR " (INJECTED)"
#else
# define INJ_STR ""
#endif
#define PR_PAC_ENABLE_FLAGS_MASK \
(PR_PAC_APIAKEY|PR_PAC_APIBKEY|PR_PAC_APDAKEY|PR_PAC_APDBKEY)
int
main(int argc, char *argv[])
{
prctl_marker();
#ifdef INJECT_RETVAL
unsigned long num_skip;
long inject_retval;
bool locked = false;
if (argc < 3)
error_msg_and_fail("Usage: %s NUM_SKIP INJECT_RETVAL", argv[0]);
num_skip = strtoul(argv[1], NULL, 0);
inject_retval = strtol(argv[2], NULL, 0);
for (size_t i = 0; i < num_skip; i++) {
if (prctl_marker() != inject_retval)
continue;
locked = true;
break;
}
if (!locked)
error_msg_and_fail("Have not locked on prctl(-1, -2, -3, -4"
", -5) returning %ld", inject_retval);
#endif /* INJECT_RETVAL */
static const struct {
kernel_ulong_t val;
const char *str;
} args[] = {
{ ARG_STR(0) },
{ ARG_STR(PR_PAC_APIAKEY) },
{ ARG_STR(PR_PAC_APIBKEY|PR_PAC_APDAKEY|PR_PAC_APDBKEY|0x10) },
{ 0x7ffffff0, NVERB("0x7ffffff0 /* ") "PR_PAC_???" NVERB(" */") },
};
long rc;
const char *errstr;
size_t i = 0;
for (i = 0; i < ARRAY_SIZE(args); i++) {
for (size_t j = 0; j < ARRAY_SIZE(args); j++) {
rc = syscall(__NR_prctl, PR_PAC_SET_ENABLED_KEYS,
args[i].val, args[j].val, 0, 1);
errstr = sprintrc(rc);
printf("prctl("
XLAT_KNOWN(0x3c, "PR_PAC_SET_ENABLED_KEYS"));
if (args[i].val) {
printf(", " XLAT_FMT_LL,
XLAT_SEL((unsigned long long) args[i].val,
args[i].str));
} else {
printf(", 0");
}
if (args[j].val) {
printf(", " XLAT_FMT_LL,
XLAT_SEL((unsigned long long) args[j].val,
args[j].str));
} else {
printf(", 0");
}
printf(", 0, 0x1) = %s" INJ_STR "\n", errstr);
}
}
rc = syscall(__NR_prctl, PR_PAC_GET_ENABLED_KEYS, 0, 0, 0, 0);
errstr = sprintrc(rc);
printf("prctl(" XLAT_KNOWN(0x3d, "PR_PAC_GET_ENABLED_KEYS")
", 0, 0, 0, 0) = ");
if (rc > 0) {
printf("%#lx", rc);
#if !XLAT_RAW
for (i = 0; i < ARRAY_SIZE(args); i++) {
if (!(rc & PR_PAC_ENABLE_FLAGS_MASK))
break;
if (args[i].val == (unsigned long) rc) {
printf(" (%s)", args[i].str);
break;
}
}
if (i == ARRAY_SIZE(args)) {
printf(" (");
printflags(pr_pac_enabled_keys, rc, "PR_PAC_???");
printf(")");
}
#endif /* !XLAT_RAW */
puts(INJ_STR);
} else {
printf("%s" INJ_STR "\n", errstr);
}
puts("+++ exited with 0 +++");
return 0;
}
|
