1 /*
2 * Check decoding of fanotify_mark syscall.
3 *
4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@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
do_call(kernel_ulong_t fd,kernel_ulong_t flags,const char * flags_str,uint64_t mask,const char * mask_str,kernel_ulong_t dirfd,const char * dirfd_str,kernel_ulong_t path,const char * path_str)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
main(void)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