1 /* 2 * Check decoding of out-of-range syscalls. 3 * 4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) 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 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 " = %ld ENOSYS (%m)\n", nr | SYSCALL_BIT, 86 a[0], a[1], a[2], a[3], a[4], a[5], rc); 87 #else 88 printf("syscall_%#lx(%#llx, %#llx, %#llx, %#llx, %#llx, %#llx)" 89 " = %ld (errno %d)\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 rc, errno); 97 #endif 98 } 99 100 int 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)); 122 123 #ifdef SYS_socket_subcall 124 test_syscall(SYS_socket_subcall + 1); 125 #endif 126 127 #ifdef SYS_ipc_subcall 128 test_syscall(SYS_ipc_subcall + 1); 129 #endif 130 131 puts("+++ exited with 0 +++"); 132 return 0; 133 } 134
