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
|
/*
* Check decoding of prctl PR_GET_DUMPABLE/PR_SET_DUMPABLE operations.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016-2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <asm/unistd.h>
#include <linux/prctl.h>
#if defined __NR_prctl && defined PR_GET_DUMPABLE && defined PR_SET_DUMPABLE \
&& !defined __ia64__
# include <stdio.h>
# include <unistd.h>
static const char *errstr;
static long
prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
{
static const kernel_ulong_t bogus_arg =
(kernel_ulong_t) 0xdeadbeefbadc0dedULL;
long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
static const kernel_ulong_t bogus_dumpable1 =
(kernel_ulong_t) 0xdeadc0de00000001ULL;
static const kernel_ulong_t bogus_dumpable2 =
(kernel_ulong_t) 0xdeadc0defacebeefULL;
static const char * const args[] = {
"SUID_DUMP_DISABLE",
"SUID_DUMP_USER",
"SUID_DUMP_ROOT",
};
unsigned int i;
prctl(PR_SET_DUMPABLE, 3);
printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
errstr);
prctl(PR_SET_DUMPABLE, bogus_dumpable1);
if (bogus_dumpable1 == 1) {
printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
} else {
printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
" = %s\n",
(unsigned long long) bogus_dumpable1, errstr);
}
prctl(PR_SET_DUMPABLE, bogus_dumpable2);
printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
(unsigned long long) bogus_dumpable2, errstr);
for (i = 0; i < ARRAY_SIZE(args); ++i) {
prctl(PR_SET_DUMPABLE, i);
printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
errstr, args[rc]);
} else {
printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
}
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_DUMPABLE && PR_SET_DUMPABLE"
" && !__ia64__")
#endif
|
