1 /* 2 * Check decoding of delete_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_delete_module) 36 37 # include <fcntl.h> 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 struct { 47 kernel_ulong_t val; 48 const char *str; 49 unsigned int val_prefix, val_suffix; 50 } flags[] = { 51 { ARG_STR(0), 0, 0 }, 52 { F8ILL_KULONG_MASK | O_NONBLOCK, "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, F8ILL_KULONG_MASK); 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
