1#!/bin/sh 2 3# 4# Copyright (c) 2011 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# pread(2) fuzzing inspired by the iknowthis test suite 30# by Tavis Ormandy <taviso cmpxchg8b com> 31 32# Fixed in r227527. 33 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35 36. ../default.cfg 37 38here=`pwd` 39cd /tmp 40sed '1,/^EOF/d' < $here/$0 > pread.c 41mycc -o pread -Wall -Wextra pread.c 42rm -f pread.c 43 44mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 45mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 46 47mount -t tmpfs tmpfs $mntpoint 48cp -a /usr/include $mntpoint 49echo "Testing tmpfs(4)" 50/tmp/pread $mntpoint 51while mount | grep -q "on $mntpoint "; do 52 umount $mntpoint || sleep 1 53done 54 55echo "Testing fdescfs(4)" 56mount -t fdescfs null /dev/fd 57for i in `jot 100`; do 58 /tmp/pread /dev/fd 59done 60 61while mount | grep -q "on /dev/fd "; do 62 umount /dev/fd || sleep 1 63done 64 65echo "Testing procfs(4)" 66mount -t procfs procfs $mntpoint 67/tmp/pread $mntpoint 68while mount | grep -q "on $mntpoint "; do 69 umount $mntpoint || sleep 1 70done 71 72mdconfig -a -t swap -s 1g -u $mdstart || exit 1 73newfs $newfs_flags md$mdstart > /dev/null 74mount /dev/md$mdstart $mntpoint 75cp -a /usr/include $mntpoint 76echo "Testing FFS" 77/tmp/pread $mntpoint 78while mount | grep -q "on $mntpoint "; do 79 umount $mntpoint || sleep 1 80done 81mdconfig -d -u $mdstart 82 83mount -t nullfs /bin $mntpoint 84echo "Testing nullfs(4)" 85/tmp/pread $mntpoint 86while mount | grep -q "on $mntpoint "; do 87 umount $mntpoint || sleep 1 88done 89 90echo "Testing procfs(4)" 91mount -t procfs procfs $mntpoint 92/tmp/pread $mntpoint 93while mount | grep -q "on $mntpoint "; do 94 umount $mntpoint || sleep 1 95done 96 97echo "Testing devfs(8)" 98mount -t devfs devfs $mntpoint 99/tmp/pread $mntpoint 100while mount | grep -q "on $mntpoint "; do 101 umount $mntpoint || sleep 1 102done 103 104rm -f /tmp/pread 105exit 0 106EOF 107#include <sys/types.h> 108#include <strings.h> 109#include <dirent.h> 110#include <err.h> 111#include <errno.h> 112#include <fcntl.h> 113#include <fts.h> 114#include <pwd.h> 115#include <signal.h> 116#include <stdio.h> 117#include <stdlib.h> 118#include <sys/uio.h> 119#include <unistd.h> 120#include <sys/wait.h> 121 122static void 123hand(int i __unused) { /* handler */ 124 _exit(1); 125} 126 127int 128test(char *path) 129{ 130 131 FTS *fts; 132 FTSENT *p; 133 int ftsoptions; 134 char *args[2]; 135 int buf[64], fd; 136 137 signal(SIGSEGV, hand); 138 signal(SIGABRT, hand); 139 ftsoptions = FTS_PHYSICAL; 140 args[0] = path; 141 args[1] = 0; 142 143 if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) 144 err(1, "fts_open"); 145 146 while ((p = fts_read(fts)) != NULL) { 147 if ((fd = open(p->fts_path, O_RDONLY)) == -1) { 148 if (errno != EACCES && errno != ENXIO) 149 warn("open(%s)", p->fts_path); 150 continue; 151 } 152 alarm(1); 153 pread(fd, (void *)0xdeadc0de, 0x7ffffff, 0xffffffff); 154 pread(fd, buf, 0x7ffffff, 0xffffffff); 155 pread(fd, buf, sizeof(buf), 0xffffffff); 156 pread(fd, buf, sizeof(buf), 0); 157 close(fd); 158 } 159 fts_close(fts); 160 161 exit(0); 162} 163 164int 165main(int argc __unused, char **argv) 166{ 167 int i; 168 struct passwd *pw; 169 170 if ((pw = getpwnam("nobody")) == NULL) 171 err(1, "no such user: nobody"); 172 173 if (setgroups(1, &pw->pw_gid) || 174 setegid(pw->pw_gid) || setgid(pw->pw_gid) || 175 seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 176 err(1, "Can't drop privileges to \"nobody\""); 177 endpwent(); 178 179 if (daemon(0, 0) == -1) 180 err(1, "daemon()"); 181 182 for (i = 0; i < 10; i++) { 183 if (fork() == 0) 184 test(argv[1]); 185 wait(NULL); 186 } 187 188 return (0); 189} 190