1 /*
2 * Check decoding of out-of-range syscalls.
3 *
4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32 #include "sysent.h"
33 #include <errno.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <asm/unistd.h>
38
39 #include "sysent_shorthand_defs.h"
40
41 static const struct_sysent syscallent[] = {
42 #include "syscallent.h"
43 };
44
45 #include "sysent_shorthand_undefs.h"
46
47 #ifndef DEBUG_PRINT
48 # define DEBUG_PRINT 0
49 #endif
50
51 #if defined __X32_SYSCALL_BIT && defined __NR_read \
52 && (__X32_SYSCALL_BIT & __NR_read) != 0
53 # define SYSCALL_BIT __X32_SYSCALL_BIT
54 #else
55 # define SYSCALL_BIT 0
56 #endif
57
58 #if DEBUG_PRINT
59 static const char *strace_name;
60 static FILE *debug_out;
61 #endif
62
63 static void
test_syscall(const unsigned long nr)64 test_syscall(const unsigned long nr)
65 {
66 static const kernel_ulong_t a[] = {
67 (kernel_ulong_t) 0xface0fedbadc0dedULL,
68 (kernel_ulong_t) 0xface1fedbadc1dedULL,
69 (kernel_ulong_t) 0xface2fedbadc2dedULL,
70 (kernel_ulong_t) 0xface3fedbadc3dedULL,
71 (kernel_ulong_t) 0xface4fedbadc4dedULL,
72 (kernel_ulong_t) 0xface5fedbadc5dedULL
73 };
74
75 long rc = syscall(nr | SYSCALL_BIT,
76 a[0], a[1], a[2], a[3], a[4], a[5]);
77
78 #if DEBUG_PRINT
79 fprintf(debug_out, "%s: pid %d invalid syscall %#lx\n",
80 strace_name, getpid(), nr | SYSCALL_BIT);
81 #endif
82
83 #ifdef LINUX_MIPSO32
84 printf("syscall(%#lx, %#lx, %#lx, %#lx, %#lx, %#lx, %#lx)"
85 " = %s\n", nr | SYSCALL_BIT,
86 a[0], a[1], a[2], a[3], a[4], a[5], sprintrc(rc));
87 #else
88 printf("syscall_%#lx(%#llx, %#llx, %#llx, %#llx, %#llx, %#llx)"
89 " = %s\n", nr | SYSCALL_BIT,
90 (unsigned long long) a[0],
91 (unsigned long long) a[1],
92 (unsigned long long) a[2],
93 (unsigned long long) a[3],
94 (unsigned long long) a[4],
95 (unsigned long long) a[5],
96 sprintrc(rc));
97 #endif
98 }
99
100 int
main(int argc,char * argv[])101 main(int argc, char *argv[])
102 {
103 #if DEBUG_PRINT
104 if (argc < 3)
105 error_msg_and_fail("Not enough arguments. "
106 "Usage: %s STRACE_NAME DEBUG_OUT_FD",
107 argv[0]);
108
109 strace_name = argv[1];
110
111 errno = 0;
112 int debug_out_fd = strtol(argv[2], NULL, 0);
113 if (errno)
114 error_msg_and_fail("Not a number: %s", argv[2]);
115
116 debug_out = fdopen(debug_out_fd, "a");
117 if (!debug_out)
118 perror_msg_and_fail("fdopen: %d", debug_out_fd);
119 #endif
120
121 test_syscall(ARRAY_SIZE(syscallent));
122 (void) syscallent; /* workaround for clang bug #33068 */
123
124 #ifdef SYS_socket_subcall
125 test_syscall(SYS_socket_subcall + 1);
126 #endif
127
128 #ifdef SYS_ipc_subcall
129 test_syscall(SYS_ipc_subcall + 1);
130 #endif
131
132 puts("+++ exited with 0 +++");
133 return 0;
134 }
135