1*8a272653SPeter Holm#!/bin/sh 2*8a272653SPeter Holm 3*8a272653SPeter Holm# 4*8a272653SPeter Holm# Copyright (c) 2014 EMC Corp. 5*8a272653SPeter Holm# All rights reserved. 6*8a272653SPeter Holm# 7*8a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 8*8a272653SPeter Holm# modification, are permitted provided that the following conditions 9*8a272653SPeter Holm# are met: 10*8a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 11*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 12*8a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 13*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 14*8a272653SPeter Holm# documentation and/or other materials provided with the distribution. 15*8a272653SPeter Holm# 16*8a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*8a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*8a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*8a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*8a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*8a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*8a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*8a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*8a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*8a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*8a272653SPeter Holm# SUCH DAMAGE. 27*8a272653SPeter Holm# 28*8a272653SPeter Holm 29*8a272653SPeter Holm# "panic: vm_map_protect: object 0xca6869c0 overcharged" seen: 30*8a272653SPeter Holm# http://people.freebsd.org/~pho/stress/log/mmap9.txt 31*8a272653SPeter Holm# Fixed in r265843 32*8a272653SPeter Holm 33*8a272653SPeter Holm# Test scenario by: Mark Johnston markj@ 34*8a272653SPeter Holm 35*8a272653SPeter Holm. ../default.cfg 36*8a272653SPeter Holm 37*8a272653SPeter Holmdir=/tmp 38*8a272653SPeter Holmodir=`pwd` 39*8a272653SPeter Holmcd $dir 40*8a272653SPeter Holmsed '1,/^EOF/d' < $odir/$0 > $dir/mmap9.c 41*8a272653SPeter Holm# At one point during the fix development, only the thread version would panic 42*8a272653SPeter Holmmycc -o mmap9 -O2 -Wall -Wextra mmap9.c || exit 1 43*8a272653SPeter Holmmycc -o mmap9p -O2 -Wall -Wextra mmap9.c -lpthread || exit 1 44*8a272653SPeter Holmrm -f mmap9.c 45*8a272653SPeter Holmcd $odir 46*8a272653SPeter Holm 47*8a272653SPeter Holm/tmp/mmap9 48*8a272653SPeter Holm/tmp/mmap9p 49*8a272653SPeter Holm 50*8a272653SPeter Holmrm -f /tmp/mmap9 /tmp/mmap9p 51*8a272653SPeter Holmexit 52*8a272653SPeter Holm 53*8a272653SPeter HolmEOF 54*8a272653SPeter Holm#include <sys/types.h> 55*8a272653SPeter Holm#include <sys/mman.h> 56*8a272653SPeter Holm 57*8a272653SPeter Holm#include <err.h> 58*8a272653SPeter Holm#include <string.h> 59*8a272653SPeter Holm#include <unistd.h> 60*8a272653SPeter Holm 61*8a272653SPeter Holmint 62*8a272653SPeter Holmmain(void) 63*8a272653SPeter Holm{ 64*8a272653SPeter Holm size_t sz = 1; 65*8a272653SPeter Holm char *addr; 66*8a272653SPeter Holm 67*8a272653SPeter Holm/* 68*8a272653SPeter Holm * This is the minimum amount of C code it takes to panic the kernel. 69*8a272653SPeter Holm * This is as submitted and thus not a complete and correct test program. 70*8a272653SPeter Holm */ 71*8a272653SPeter Holm addr = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANON, 72*8a272653SPeter Holm -1, 0); 73*8a272653SPeter Holm if (addr == NULL) 74*8a272653SPeter Holm err(1, "mmap"); 75*8a272653SPeter Holm memset(addr, 0, sz); 76*8a272653SPeter Holm 77*8a272653SPeter Holm if (fork() != 0) { 78*8a272653SPeter Holm if (mlock(addr, sz)) 79*8a272653SPeter Holm err(1, "mlock"); 80*8a272653SPeter Holm if (mprotect(addr, sz, PROT_READ)) 81*8a272653SPeter Holm err(1, "mprotect"); 82*8a272653SPeter Holm if (mprotect(addr, sz, PROT_READ | PROT_WRITE)) 83*8a272653SPeter Holm err(1, "mprotect"); 84*8a272653SPeter Holm if (mprotect(addr, sz, PROT_READ)) 85*8a272653SPeter Holm err(1, "mprotect"); 86*8a272653SPeter Holm if (mprotect(addr, sz, PROT_READ | PROT_WRITE)) 87*8a272653SPeter Holm err(1, "mprotect"); 88*8a272653SPeter Holm } else 89*8a272653SPeter Holm /* 90*8a272653SPeter Holm * Ensure that shadow objects aren't collapsed by process exit. 91*8a272653SPeter Holm */ 92*8a272653SPeter Holm sleep(1); 93*8a272653SPeter Holm 94*8a272653SPeter Holm return (0); 95*8a272653SPeter Holm} 96