1 /*
2 * Check decoding of delete_module syscall.
3 *
4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31
32 #include <asm/unistd.h>
33
34 #if defined(__NR_delete_module)
35
36 # include <fcntl.h>
37 # include <stdio.h>
38 # include <unistd.h>
39
40 # include "init_delete_module.h"
41
42 int
main(void)43 main(void)
44 {
45 static const struct {
46 kernel_ulong_t val;
47 const char *str;
48 unsigned int val_prefix, val_suffix;
49 } flags[] = {
50 { ARG_STR(0), 0, 0 },
51 { (kernel_ulong_t) 0xffffffff00000000ULL | O_NONBLOCK,
52 "O_NONBLOCK", 0, 0 },
53 { (kernel_ulong_t) 0xbadc0dedfacef157ULL & ~(O_NONBLOCK | O_TRUNC),
54 " /* O_??? */", 0xfacef157U & ~(O_NONBLOCK | O_TRUNC), 0},
55 { (kernel_ulong_t) (0xfacef157deade71cULL & ~O_NONBLOCK) | O_TRUNC,
56 "O_TRUNC", 0, 0xdeade71c & ~(O_NONBLOCK | O_TRUNC)},
57 { -1LL, "O_NONBLOCK|O_TRUNC", 0, -1U & ~(O_NONBLOCK | O_TRUNC)},
58 };
59
60 long rc;
61 char *bogus_param1 = tail_alloc(PARAM1_LEN);
62 char *bogus_param2 = tail_alloc(PARAM2_LEN);
63 const char *errstr;
64
65 fill_memory_ex(bogus_param1, PARAM1_LEN, PARAM1_BASE, PARAM1_LEN);
66 fill_memory_ex(bogus_param2, PARAM2_LEN, PARAM2_BASE, PARAM2_LEN);
67
68 rc = syscall(__NR_delete_module, NULL, bogus_zero);
69 printf("delete_module(NULL, 0) = %s\n", sprintrc(rc));
70
71 rc = syscall(__NR_delete_module, bogus_param1, flags[0].val);
72 errstr = sprintrc(rc);
73
74 printf("delete_module(\"");
75 print_str(PARAM1_BASE, MAX_STRLEN, false);
76 printf("\"..., %s) = %s\n", flags[0].str, errstr);
77
78 bogus_param1[PARAM1_LEN - 1] = '\0';
79
80 rc = syscall(__NR_delete_module, bogus_param1, flags[1].val);
81 errstr = sprintrc(rc);
82
83 printf("delete_module(\"");
84 print_str(PARAM1_BASE, MAX_STRLEN, false);
85 printf("\", %s) = %s\n", flags[1].str, errstr);
86
87 rc = syscall(__NR_delete_module, bogus_param2 + PARAM2_LEN,
88 flags[2].val);
89 printf("delete_module(%p, %#x%s) = %s\n",
90 bogus_param2 + PARAM2_LEN, flags[2].val_prefix,
91 flags[2].str, sprintrc(rc));
92
93 rc = syscall(__NR_delete_module, bogus_param2, flags[3].val);
94 printf("delete_module(%p, %s|%#x) = %s\n",
95 bogus_param2, flags[3].str, flags[3].val_suffix, sprintrc(rc));
96
97 bogus_param2[PARAM2_LEN - 1] = '\0';
98
99 rc = syscall(__NR_delete_module, bogus_param2, flags[4].val);
100 errstr = sprintrc(rc);
101
102 printf("delete_module(\"");
103 print_str(PARAM2_BASE, PARAM2_LEN - 1, true);
104 printf("\", %s|%#x) = %s\n", flags[4].str, flags[4].val_suffix, errstr);
105
106 puts("+++ exited with 0 +++");
107
108 return 0;
109 }
110
111 #else
112
113 SKIP_MAIN_UNDEFINED("__NR_delete_module");
114
115 #endif
116