1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 6 * under sponsorship from the FreeBSD Foundation. 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 * 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 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <errno.h> 35 #include <limits.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 #include <atf-c.h> 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 #include <machine/vmparam.h> 43 44 static int scratch_file; 45 46 static int 47 copyin_checker(uintptr_t uaddr, size_t len) 48 { 49 ssize_t ret; 50 51 ret = write(scratch_file, (const void *)uaddr, len); 52 return (ret == -1 ? errno : 0); 53 } 54 55 #define FMAX ULONG_MAX 56 57 ATF_TC_WITHOUT_HEAD(kern_copyin); 58 ATF_TC_BODY(kern_copyin, tc) 59 { 60 char template[] = "copyin.XXXXXX"; 61 62 #ifdef __mips__ 63 /* 64 * MIPS has different VM layout: the UVA map on mips ends the 65 * highest mapped entry at the VM_MAXUSER_ADDRESS - PAGE_SIZE, 66 * while all other arches map either stack or shared page up 67 * to the VM_MAXUSER_ADDRESS. 68 */ 69 atf_tc_skip("Platform is not supported."); 70 #endif 71 72 scratch_file = mkstemp(template); 73 ATF_REQUIRE(scratch_file != -1); 74 unlink(template); 75 76 ATF_CHECK(copyin_checker(0, 0) == 0); 77 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 9) == 0); 78 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 10) == 0); 79 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 11) == EFAULT); 80 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 1, 1) == 0); 81 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 0) == 0); 82 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 1) == EFAULT); 83 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 2) == EFAULT); 84 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 0) == 0); 85 ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 2) == EFAULT); 86 ATF_CHECK(copyin_checker(FMAX - 10, 9) == EFAULT); 87 ATF_CHECK(copyin_checker(FMAX - 10, 10) == EFAULT); 88 ATF_CHECK(copyin_checker(FMAX - 10, 11) == EFAULT); 89 } 90 91 ATF_TP_ADD_TCS(tp) 92 { 93 94 ATF_TP_ADD_TC(tp, kern_copyin); 95 return (atf_no_error()); 96 } 97