1 /* 2 * Check decoding of finit_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 #include "scno.h" 35 36 #if defined(__NR_finit_module) 37 38 # include <stdio.h> 39 # include <unistd.h> 40 41 # include "init_delete_module.h" 42 43 int 44 main(void) 45 { 46 static const kernel_ulong_t bogus_fd = 47 (kernel_ulong_t) 0xdeb0d1edbeeff00dULL; 48 49 static const struct { 50 kernel_ulong_t val; 51 const char *str; 52 } flags[] = { 53 { ARG_STR(0) }, 54 { (kernel_ulong_t) 0xffffffff00000002ULL, 55 "MODULE_INIT_IGNORE_VERMAGIC" }, 56 { (kernel_ulong_t) 0xbadc0deddefaced0ULL, 57 "0xdefaced0 /* MODULE_INIT_??? */" }, 58 { (kernel_ulong_t) 0xfacef157dec0ded1ULL, 59 "MODULE_INIT_IGNORE_MODVERSIONS|0xdec0ded0" }, 60 { -1LL, "MODULE_INIT_IGNORE_MODVERSIONS|" 61 "MODULE_INIT_IGNORE_VERMAGIC|0xfffffffc" }, 62 }; 63 64 long rc; 65 char *bogus_param1 = tail_alloc(PARAM1_LEN); 66 char *bogus_param2 = tail_alloc(PARAM2_LEN); 67 const char *errstr; 68 69 fill_memory_ex(bogus_param1, PARAM1_LEN, PARAM1_BASE, PARAM1_LEN); 70 fill_memory_ex(bogus_param2, PARAM2_LEN, PARAM2_BASE, PARAM2_LEN); 71 72 rc = syscall(__NR_finit_module, F8ILL_KULONG_MASK, NULL, 73 F8ILL_KULONG_MASK); 74 printf("finit_module(0, NULL, 0) = %s\n", sprintrc(rc)); 75 76 rc = syscall(__NR_finit_module, bogus_fd, bogus_param1, flags[0].val); 77 errstr = sprintrc(rc); 78 79 printf("finit_module(%d, \"", (int) bogus_fd); 80 print_str(PARAM1_BASE, MAX_STRLEN, false); 81 printf("\"..., %s) = %s\n", flags[0].str, errstr); 82 83 bogus_param1[PARAM1_LEN - 1] = '\0'; 84 85 rc = syscall(__NR_finit_module, bogus_fd, bogus_param1, flags[1].val); 86 errstr = sprintrc(rc); 87 88 printf("finit_module(%d, \"", (int) bogus_fd); 89 print_str(PARAM1_BASE, MAX_STRLEN, false); 90 printf("\", %s) = %s\n", flags[1].str, errstr); 91 92 rc = syscall(__NR_finit_module, bogus_fd, bogus_param2 + PARAM2_LEN, 93 flags[2].val); 94 printf("finit_module(%d, %p, %s) = %s\n", 95 (int) bogus_fd, bogus_param2 + PARAM2_LEN, flags[2].str, 96 sprintrc(rc)); 97 98 rc = syscall(__NR_finit_module, bogus_fd, bogus_param2, flags[3].val); 99 printf("finit_module(%d, %p, %s) = %s\n", 100 (int) bogus_fd, bogus_param2, flags[3].str, sprintrc(rc)); 101 102 bogus_param2[PARAM2_LEN - 1] = '\0'; 103 104 rc = syscall(__NR_finit_module, bogus_fd, bogus_param2, flags[4].val); 105 errstr = sprintrc(rc); 106 107 printf("finit_module(%d, \"", (int) bogus_fd); 108 print_str(PARAM2_BASE, PARAM2_LEN - 1, true); 109 printf("\", %s) = %s\n", flags[4].str, errstr); 110 111 puts("+++ exited with 0 +++"); 112 113 return 0; 114 } 115 116 #else 117 118 SKIP_MAIN_UNDEFINED("__NR_finit_module"); 119 120 #endif 121
