1#!/bin/sh 2 3# 4# Copyright (c) 2013 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# msync(2) / mlockall(2) test scenario. 30# "panic: vm_fault_copy_wired: page missing" seen. 31# http://people.freebsd.org/~pho/stress/log/msync.txt 32# Fixed in r253189. 33 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35 36. ../default.cfg 37 38dir=/tmp 39odir=`pwd` 40cd $dir 41sed '1,/^EOF/d' < $odir/$0 > $dir/msync.c 42mycc -o msync -Wall -Wextra msync.c -lpthread || exit 1 43rm -f msync.c 44cd $odir 45 46/tmp/msync & 47sleep 180 48while pkill -9 msync; do :; done 49wait 50rm -f /tmp/msync 51exit 52 53EOF 54#include <sys/types.h> 55#include <err.h> 56#include <errno.h> 57#include <fcntl.h> 58#include <pthread.h> 59#include <pwd.h> 60#include <signal.h> 61#include <sys/mman.h> 62#include <stdint.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include <sys/param.h> 67#include <sys/stat.h> 68#include <sys/syscall.h> 69#include <sys/wait.h> 70#include <unistd.h> 71 72int syscallno = SYS_msync; 73#define N (128 * 1024 / (int)sizeof(u_int32_t)) 74u_int32_t r[N]; 75 76static void 77hand(int i __unused) { /* handler */ 78 _exit(1); 79} 80 81unsigned long 82makearg(void) 83{ 84 unsigned int i; 85 unsigned long val; 86 87 val = arc4random(); 88 i = arc4random() % 100; 89 if (i < 20) 90 val = val & 0xff; 91 if (i >= 20 && i < 40) 92 val = val & 0xffff; 93 if (i >= 40 && i < 60) 94 val = (unsigned long)(r) | (val & 0xffff); 95#if defined(__LP64__) 96 if (i >= 60) { 97 val = (val << 32) | arc4random(); 98 if (i > 80) 99 val = val & 0x00007fffffffffffUL; 100 } 101#endif 102 103 return(val); 104} 105 106void * 107calls(void *arg __unused) 108{ 109 int i, num; 110 unsigned long arg1, arg2, arg3; 111 112 usleep(1000); 113 num = syscallno; 114 for (i = 0; i < 500; i++) { 115 arg1 = makearg(); 116 arg2 = makearg(); 117#if 0 118 arg3 = makearg(); 119 arg3 = arg3 & ~MS_INVALIDATE; /* No problem seen */ 120#else 121 arg3 = MS_INVALIDATE; /* panic */ 122#endif 123 124#if 0 125 fprintf(stderr, "%2d : syscall(%3d, 0x%lx, 0x%lx, 0x%lx)\n", 126 i, num, arg1, arg2, arg3); 127 usleep(50000); 128#endif 129 alarm(1); 130 syscall(num, arg1, arg2, arg3); 131 num = 0; 132 } 133 134 return (0); 135} 136void 137wd(void) 138{ 139 int i; 140 141 if (mlockall(MCL_CURRENT | MCL_FUTURE) != 0) 142 err(1, "mlockall failed"); 143 144 for (i = 0; i < 800; i++) { 145 if (fork() == 0) { 146 usleep(20000); 147 _exit(0); 148 } 149 wait(NULL); 150 usleep(100000); 151 } 152 153 _exit(0); 154} 155 156int 157main(void) 158{ 159 struct passwd *pw; 160 pthread_t cp[50]; 161 int e, i, j; 162 163 if (fork() == 0) 164 wd(); 165 166 if ((pw = getpwnam("nobody")) == NULL) 167 err(1, "no such user: nobody"); 168 169 if (setgroups(1, &pw->pw_gid) || 170 setegid(pw->pw_gid) || setgid(pw->pw_gid) || 171 seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 172 err(1, "Can't drop privileges to \"nobody\""); 173 endpwent(); 174 175 signal(SIGALRM, hand); 176 signal(SIGILL, hand); 177 signal(SIGFPE, hand); 178 signal(SIGSEGV, hand); 179 signal(SIGBUS, hand); 180 signal(SIGURG, hand); 181 signal(SIGSYS, hand); 182 signal(SIGTRAP, hand); 183 184 alarm(180); 185 for (i = 0; i < 8000; i++) { 186 if (fork() == 0) { 187 for (j = 0; j < N; j++) 188 r[j] = arc4random(); 189 for (j = 0; j < 50; j++) 190 if ((e = pthread_create(&cp[j], NULL, calls, NULL)) != 0) 191 errc(1, e, "pthread_create"); 192 193 for (j = 0; j < 50; j++) 194 pthread_join(cp[j], NULL); 195 _exit(0); 196 } 197 wait(NULL); 198 } 199 200 return (0); 201} 202