2 * Copyright (c) 2009 Simon L. Nielsen <simon@FreeBSD.org>,
3 * Bjoern A. Zeeb <bz@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
31 #include <sys/sysctl.h>
42 int ok[2]; /* Depending on security.bsd.map_at_zero {0, !=0}. */
43 } map_at_zero_tests[] = {
44 { (void *)0, { 0, 1 } }, /* Test sysctl. */
45 { (void *)1, { 0, 0 } },
46 { (void *)(PAGE_SIZE - 1), { 0, 0 } },
47 { (void *)PAGE_SIZE, { 1, 1 } },
48 { (void *)-1, { 0, 0 } },
49 { (void *)(-PAGE_SIZE), { 0, 0 } },
50 { (void *)(-1 - PAGE_SIZE), { 0, 0 } },
51 { (void *)(-1 - PAGE_SIZE - 1), { 0, 0 } },
52 { (void *)(0x1000 * PAGE_SIZE), { 1, 1 } },
55 #define MAP_AT_ZERO "security.bsd.map_at_zero"
57 ATF_TC_WITHOUT_HEAD(mmap__map_at_zero);
58 ATF_TC_BODY(mmap__map_at_zero, tc)
65 len = sizeof(map_at_zero);
66 if (sysctlbyname(MAP_AT_ZERO, &map_at_zero, &len, NULL, 0) == -1) {
67 atf_tc_skip("sysctl for %s failed: %s\n", MAP_AT_ZERO,
72 /* Normalize to 0 or 1 for array access. */
73 map_at_zero = !!map_at_zero;
75 for (i = 0; i < nitems(map_at_zero_tests); i++) {
76 p = mmap((void *)map_at_zero_tests[i].addr, PAGE_SIZE,
77 PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED,
79 if (p == MAP_FAILED) {
80 ATF_CHECK_MSG(map_at_zero_tests[i].ok[map_at_zero] == 0,
81 "mmap(%p, ...) failed", map_at_zero_tests[i].addr);
83 ATF_CHECK_MSG(map_at_zero_tests[i].ok[map_at_zero] == 1,
84 "mmap(%p, ...) succeeded: p=%p\n",
85 map_at_zero_tests[i].addr, p);
91 checked_mmap(int prot, int flags, int fd, int error, const char *msg)
96 ATF_REQUIRE((pagesize = getpagesize()) > 0);
97 p = mmap(NULL, pagesize, prot, flags, fd, 0);
98 if (p == MAP_FAILED) {
100 ATF_CHECK_MSG(0, "%s failed with errno %d", msg,
103 ATF_CHECK_EQ_MSG(error, errno,
104 "%s failed with wrong errno %d (expected %d)", msg,
107 ATF_CHECK_MSG(error == 0, "%s succeeded", msg);
112 ATF_TC_WITHOUT_HEAD(mmap__bad_arguments);
113 ATF_TC_BODY(mmap__bad_arguments, tc)
115 int devstatfd, pagesize, shmfd, zerofd;
117 ATF_REQUIRE((pagesize = getpagesize()) > 0);
118 ATF_REQUIRE((devstatfd = open("/dev/devstat", O_RDONLY)) >= 0);
119 ATF_REQUIRE((shmfd = shm_open(SHM_ANON, O_RDWR, 0644)) >= 0);
120 ATF_REQUIRE(ftruncate(shmfd, pagesize) == 0);
121 ATF_REQUIRE((zerofd = open("/dev/zero", O_RDONLY)) >= 0);
123 /* These should work. */
124 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON, -1, 0,
126 checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, shmfd, 0,
127 "simple shm fd shared");
128 checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, shmfd, 0,
129 "simple shm fd private");
130 checked_mmap(PROT_READ, MAP_SHARED, zerofd, 0,
131 "simple /dev/zero shared");
132 checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, zerofd, 0,
133 "simple /dev/zero private");
134 checked_mmap(PROT_READ, MAP_SHARED, devstatfd, 0,
135 "simple /dev/devstat shared");
137 /* Extra PROT flags. */
138 checked_mmap(PROT_READ | PROT_WRITE | 0x100000, MAP_ANON, -1, EINVAL,
139 "MAP_ANON with extra PROT flags");
140 checked_mmap(0xffff, MAP_SHARED, shmfd, EINVAL,
141 "shm fd with garbage PROT");
143 /* Undefined flag. */
144 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_RESERVED0080, -1,
145 EINVAL, "Undefined flag");
147 /* Both MAP_SHARED and MAP_PRIVATE */
148 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE |
149 MAP_SHARED, -1, EINVAL, "MAP_ANON with both SHARED and PRIVATE");
150 checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_SHARED, shmfd,
151 EINVAL, "shm fd with both SHARED and PRIVATE");
153 /* At least one of MAP_SHARED or MAP_PRIVATE without ANON */
154 checked_mmap(PROT_READ | PROT_WRITE, 0, shmfd, EINVAL,
155 "shm fd without sharing flag");
157 /* MAP_ANON with either sharing flag (impacts fork). */
158 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0,
160 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0,
163 /* MAP_ANON should require an fd of -1. */
164 checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 0, EINVAL,
165 "MAP_ANON with fd != -1");
167 /* Writable MAP_SHARED should fail on read-only descriptors. */
168 checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, zerofd, EACCES,
169 "MAP_SHARED of read-only /dev/zero");
172 * Character devices other than /dev/zero do not support private
175 checked_mmap(PROT_READ, MAP_PRIVATE, devstatfd, EINVAL,
176 "MAP_PRIVATE of /dev/devstat");
183 ATF_TC_WITHOUT_HEAD(mmap__dev_zero_private);
184 ATF_TC_BODY(mmap__dev_zero_private, tc)
189 ATF_REQUIRE((pagesize = getpagesize()) > 0);
190 ATF_REQUIRE((fd = open("/dev/zero", O_RDONLY)) >= 0);
192 p1 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
193 ATF_REQUIRE(p1 != MAP_FAILED);
195 p2 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
196 ATF_REQUIRE(p2 != MAP_FAILED);
198 for (i = 0; i < pagesize; i++)
199 ATF_REQUIRE_EQ_MSG(0, p1[i], "byte at p1[%d] is %x", i, p1[i]);
201 ATF_REQUIRE(memcmp(p1, p2, pagesize) == 0);
205 ATF_REQUIRE(p2[0] == 0);
209 ATF_REQUIRE(p1[0] == 1);
211 p3 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
212 ATF_REQUIRE(p3 != MAP_FAILED);
214 ATF_REQUIRE(p3[0] == 0);
216 munmap(p1, pagesize);
217 munmap(p2, pagesize);
218 munmap(p3, pagesize);
222 ATF_TC_WITHOUT_HEAD(mmap__dev_zero_shared);
223 ATF_TC_BODY(mmap__dev_zero_shared, tc)
228 ATF_REQUIRE((pagesize = getpagesize()) > 0);
229 ATF_REQUIRE((fd = open("/dev/zero", O_RDWR)) >= 0);
231 p1 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
232 ATF_REQUIRE(p1 != MAP_FAILED);
234 p2 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
235 ATF_REQUIRE(p2 != MAP_FAILED);
237 for (i = 0; i < pagesize; i++)
238 ATF_REQUIRE_EQ_MSG(0, p1[i], "byte at p1[%d] is %x", i, p1[i]);
240 ATF_REQUIRE(memcmp(p1, p2, pagesize) == 0);
244 ATF_REQUIRE(p2[0] == 0);
248 ATF_REQUIRE(p1[0] == 1);
250 p3 = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd,
252 ATF_REQUIRE(p3 != MAP_FAILED);
254 ATF_REQUIRE(p3[0] == 0);
256 munmap(p1, pagesize);
257 munmap(p2, pagesize);
258 munmap(p3, pagesize);
265 ATF_TP_ADD_TC(tp, mmap__map_at_zero);
266 ATF_TP_ADD_TC(tp, mmap__bad_arguments);
267 ATF_TP_ADD_TC(tp, mmap__dev_zero_private);
268 ATF_TP_ADD_TC(tp, mmap__dev_zero_shared);
270 return (atf_no_error());