1 /* 2 * Check decoding of fanotify_mark syscall. 3 * 4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com> 6 * Copyright (c) 2015-2017 The strace developers. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "tests.h" 33 34 #include <asm/unistd.h> 35 36 #if defined HAVE_SYS_FANOTIFY_H && defined HAVE_FANOTIFY_MARK && \ 37 defined __NR_fanotify_mark 38 39 # include <limits.h> 40 # include <stdio.h> 41 # include <unistd.h> 42 # include <sys/fanotify.h> 43 44 /* Performs fanotify_mark call via the syscall interface. */ 45 static void 46 do_call(kernel_ulong_t fd, kernel_ulong_t flags, const char *flags_str, 47 uint64_t mask, const char *mask_str, kernel_ulong_t dirfd, 48 const char *dirfd_str, kernel_ulong_t path, const char *path_str) 49 { 50 long rc; 51 52 rc = syscall(__NR_fanotify_mark, fd, flags, 53 # if (LONG_MAX > INT_MAX) \ 54 || (defined __x86_64__ && defined __ILP32__) \ 55 || defined LINUX_MIPSN32 56 mask, 57 # else 58 /* arch/parisc/kernel/sys_parisc32.c, commit ab8a261b */ 59 # ifdef HPPA 60 LL_VAL_TO_PAIR((mask << 32) | (mask >> 32)), 61 # else 62 LL_VAL_TO_PAIR(mask), 63 # endif 64 # endif 65 dirfd, path); 66 67 printf("fanotify_mark(%d, %s, %s, %s, %s) = %s\n", 68 (int) fd, flags_str, mask_str, dirfd_str, path_str, 69 sprintrc(rc)); 70 } 71 72 struct strval { 73 kernel_ulong_t val; 74 const char *str; 75 }; 76 77 struct strval64 { 78 uint64_t val; 79 const char *str; 80 }; 81 82 #define STR16 "0123456789abcdef" 83 #define STR64 STR16 STR16 STR16 STR16 84 85 int 86 main(void) 87 { 88 enum { 89 PATH1_SIZE = 64, 90 }; 91 92 static const kernel_ulong_t fds[] = { 93 (kernel_ulong_t) 0xdeadfeed12345678ULL, 94 F8ILL_KULONG_MASK, 95 (kernel_ulong_t) 0xdeb0d1edffffffffULL, 96 }; 97 static const struct strval flags[] = { 98 { F8ILL_KULONG_MASK, "0" }, 99 { (kernel_ulong_t) 0xdec0deddefaced00ULL, 100 "0xefaced00 /* FAN_MARK_??? */" }, 101 { (kernel_ulong_t) 0xda7a105700000040ULL, 102 "FAN_MARK_IGNORED_SURV_MODIFY" }, 103 { (kernel_ulong_t) 0xbadc0deddeadfeedULL, 104 "FAN_MARK_ADD|FAN_MARK_DONT_FOLLOW|FAN_MARK_ONLYDIR|" 105 "FAN_MARK_IGNORED_MASK|FAN_MARK_IGNORED_SURV_MODIFY|" 106 "FAN_MARK_FLUSH|0xdeadfe00" }, 107 }; 108 static const struct strval64 masks[] = { 109 { ARG_ULL_STR(0) }, 110 { 0xdeadfeedfacebeefULL, 111 "FAN_ACCESS|FAN_MODIFY|FAN_CLOSE_WRITE|FAN_OPEN|" 112 "FAN_ACCESS_PERM|FAN_ONDIR|FAN_EVENT_ON_CHILD|" 113 "0xdeadfeedb2ccbec4" }, 114 { ARG_ULL_STR(0xffffffffb7fcbfc4) " /* FAN_??? */" }, 115 }; 116 static const struct strval dirfds[] = { 117 { (kernel_ulong_t) 0xfacefeed00000001ULL, "1" }, 118 { (kernel_ulong_t) 0xdec0ded0ffffffffULL, "FAN_NOFD" }, 119 { (kernel_ulong_t) 0xbadfacedffffff9cULL, "AT_FDCWD" }, 120 { (kernel_ulong_t) 0xdefaced1beeff00dULL, "-1091571699" }, 121 }; 122 static const char str64[] = STR64; 123 124 static char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2]; 125 static char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2]; 126 127 char *bogus_path1 = tail_memdup(str64, PATH1_SIZE); 128 char *bogus_path2 = tail_memdup(str64, sizeof(str64)); 129 130 struct strval paths[] = { 131 { (kernel_ulong_t) 0, "NULL" }, 132 { (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE), 133 bogus_path1_after_addr }, 134 { (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr }, 135 { (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" }, 136 }; 137 138 unsigned int i; 139 unsigned int j; 140 unsigned int k; 141 unsigned int l; 142 unsigned int m; 143 int rc; 144 145 146 snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1); 147 snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p", 148 bogus_path1 + PATH1_SIZE); 149 150 rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR, 151 -100, "."); 152 printf("fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY|FAN_ONDIR" 153 ", AT_FDCWD, \".\") = %s\n", sprintrc(rc)); 154 155 for (i = 0; i < ARRAY_SIZE(fds); i++) { 156 for (j = 0; j < ARRAY_SIZE(flags); j++) { 157 for (k = 0; k < ARRAY_SIZE(masks); k++) { 158 for (l = 0; l < ARRAY_SIZE(dirfds); l++) { 159 for (m = 0; m < ARRAY_SIZE(paths); m++) 160 do_call(fds[i], 161 flags[j].val, 162 flags[j].str, 163 masks[k].val, 164 masks[k].str, 165 dirfds[l].val, 166 dirfds[l].str, 167 paths[m].val, 168 paths[m].str); 169 } 170 } 171 } 172 } 173 174 puts("+++ exited with 0 +++"); 175 return 0; 176 } 177 178 #else 179 180 SKIP_MAIN_UNDEFINED("HAVE_SYS_FANOTIFY_H && HAVE_FANOTIFY_MARK && " 181 "__NR_fanotify_mark") 182 183 #endif 184
