1 /* 2 * Check decoding of init_module syscall. 3 * 4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com> 5 * Copyright (c) 2016-2017 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 33 #include <asm/unistd.h> 34 35 #if defined(__NR_init_module) 36 37 # include <stdio.h> 38 # include <unistd.h> 39 40 # include "init_delete_module.h" 41 42 int 43 main(void) 44 { 45 46 static const kernel_ulong_t bogus_addr = 47 (kernel_ulong_t) 0xfffffeedfffffaceULL; 48 static const kernel_ulong_t bogus_len = 49 (kernel_ulong_t) 0xfffffca7ffffc0deULL; 50 51 long rc; 52 char *bogus_param1 = tail_alloc(PARAM1_LEN); 53 char *bogus_param2 = tail_alloc(PARAM2_LEN); 54 const char *errstr; 55 56 fill_memory_ex(bogus_param1, PARAM1_LEN, PARAM1_BASE, PARAM1_LEN); 57 fill_memory_ex(bogus_param2, PARAM2_LEN, PARAM2_BASE, PARAM2_LEN); 58 59 rc = syscall(__NR_init_module, NULL, F8ILL_KULONG_MASK, NULL); 60 printf("init_module(NULL, %llu, NULL) = %s\n", 61 (unsigned long long) F8ILL_KULONG_MASK, sprintrc(rc)); 62 63 rc = syscall(__NR_init_module, bogus_addr, 0, bogus_param1); 64 errstr = sprintrc(rc); 65 66 printf("init_module(%#llx, 0, \"", (unsigned long long) bogus_addr); 67 print_str(PARAM1_BASE, MAX_STRLEN, false); 68 printf("\"...) = %s\n", errstr); 69 70 bogus_param1[PARAM1_LEN - 1] = '\0'; 71 72 rc = syscall(__NR_init_module, bogus_addr, 0, bogus_param1); 73 errstr = sprintrc(rc); 74 75 printf("init_module(%#llx, 0, \"", (unsigned long long) bogus_addr); 76 print_str(PARAM1_BASE, MAX_STRLEN, false); 77 printf("\") = %s\n", errstr); 78 79 rc = syscall(__NR_init_module, bogus_addr, bogus_len, 80 bogus_param2 + PARAM2_LEN); 81 printf("init_module(%#llx, %llu, %p) = %s\n", 82 (unsigned long long) bogus_addr, (unsigned long long) bogus_len, 83 bogus_param2 + PARAM2_LEN, sprintrc(rc)); 84 85 rc = syscall(__NR_init_module, NULL, bogus_len, bogus_param2); 86 printf("init_module(NULL, %llu, %p) = %s\n", 87 (unsigned long long) bogus_len, bogus_param2, sprintrc(rc)); 88 89 bogus_param2[PARAM2_LEN - 1] = '\0'; 90 91 rc = syscall(__NR_init_module, NULL, bogus_len, bogus_param2); 92 errstr = sprintrc(rc); 93 94 printf("init_module(NULL, %llu, \"", (unsigned long long) bogus_len); 95 print_str(PARAM2_BASE, PARAM2_LEN - 1, true); 96 printf("\") = %s\n", errstr); 97 98 puts("+++ exited with 0 +++"); 99 100 return 0; 101 } 102 103 #else 104 105 SKIP_MAIN_UNDEFINED("__NR_init_module"); 106 107 #endif 108
