2 * Copyright (c) 2015, 2020 The FreeBSD Foundation
5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
6 * under sponsorship from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
35 #include <sys/sysctl.h>
44 #include <machine/vmparam.h>
46 static int scratch_file;
49 copyin_checker(uintptr_t uaddr, size_t len)
53 ret = write(scratch_file, (const void *)uaddr, len);
54 return (ret == -1 ? errno : 0);
59 get_maxuser_address(void)
67 mib[2] = KERN_PROC_PS_STRINGS;
69 len = sizeof(psstrings);
70 error = sysctl(mib, nitems(mib), &psstrings, &len, NULL, 0);
74 if (psstrings == PS_STRINGS_LA57)
75 return (VM_MAXUSER_ADDRESS_LA57);
76 if (psstrings == PS_STRINGS_LA48)
77 return (VM_MAXUSER_ADDRESS_LA48);
78 /* AMD LA48 with clipped UVA */
79 if (psstrings == PS_STRINGS_LA48 - PAGE_SIZE)
80 return (VM_MAXUSER_ADDRESS_LA48 - PAGE_SIZE);
85 #define FMAX ULONG_MAX
87 ATF_TC_WITHOUT_HEAD(kern_copyin);
88 ATF_TC_BODY(kern_copyin, tc)
90 char template[] = "copyin.XXXXXX";
95 * MIPS has different VM layout: the UVA map on mips ends the
96 * highest mapped entry at the VM_MAXUSER_ADDRESS - PAGE_SIZE,
97 * while all other arches map either stack or shared page up
98 * to the VM_MAXUSER_ADDRESS.
100 maxuser = VM_MAXUSER_ADDRESS - PAGE_SIZE;
101 #elif defined(__amd64__)
102 maxuser = get_maxuser_address();
103 ATF_REQUIRE(maxuser != 0);
105 maxuser = VM_MAXUSER_ADDRESS;
108 scratch_file = mkstemp(template);
109 ATF_REQUIRE(scratch_file != -1);
112 ATF_CHECK(copyin_checker(0, 0) == 0);
113 ATF_CHECK(copyin_checker(maxuser - 10, 9) == 0);
114 ATF_CHECK(copyin_checker(maxuser - 10, 10) == 0);
115 ATF_CHECK(copyin_checker(maxuser - 10, 11) == EFAULT);
116 ATF_CHECK(copyin_checker(maxuser - 1, 1) == 0);
117 ATF_CHECK(copyin_checker(maxuser, 0) == 0);
118 ATF_CHECK(copyin_checker(maxuser, 1) == EFAULT);
119 ATF_CHECK(copyin_checker(maxuser, 2) == EFAULT);
120 ATF_CHECK(copyin_checker(maxuser + 1, 0) == 0);
121 ATF_CHECK(copyin_checker(maxuser + 1, 2) == EFAULT);
122 ATF_CHECK(copyin_checker(FMAX - 10, 9) == EFAULT);
123 ATF_CHECK(copyin_checker(FMAX - 10, 10) == EFAULT);
124 ATF_CHECK(copyin_checker(FMAX - 10, 11) == EFAULT);
130 ATF_TP_ADD_TC(tp, kern_copyin);
131 return (atf_no_error());