1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2019 Peter Holm 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# pipe(2) tests. 31# "panic: vm_page_dequeue: queued unlocked page 0xfffffe0019a73518" seen. 32 33# Reported by syzkaller 34# Fixed by r354400 35 36. ../default.cfg 37 38dir=/tmp 39odir=`pwd` 40cd $dir 41sed '1,/^EOF/d' < $odir/$0 > $dir/pipe3.c 42mycc -o pipe3 -Wall -Wextra -O0 -g pipe3.c || exit 1 43rm -f pipe3.c 44cd $odir 45 46(cd ../testcases/swap; ./swap -t 5m -i 20 -l 100) & 47sleep 1 48for i in `jot 25`; do 49 /tmp/pipe3 & 50done 51while pkill -0 pipe3; do sleep 2; done 52while pkill -9 swap; do sleep 1; done 53wait 54rm -rf /tmp/pipe3 55exit 0 56 57EOF 58#include <sys/types.h> 59#include <sys/wait.h> 60 61#include <err.h> 62#include <signal.h> 63#include <stdbool.h> 64#include <stdio.h> 65#include <stdlib.h> 66#include <time.h> 67#include <unistd.h> 68 69#define PARALLEL 64 70#define RUNTIME (5 * 60) 71 72static void 73handler(int i __unused) { 74 _exit(0); 75} 76 77void 78test(void) 79{ 80 int fds[2], r; 81 char c; 82 83 if (pipe(fds) == -1) 84 err(1, "pipe"); 85 86 if (fork() == 0) { 87 signal(SIGALRM, handler); 88 ualarm(1 + arc4random() % 10000, 0); 89 close(fds[1]); 90 if ((r = write(fds[0], &c, sizeof(c))) != sizeof(c)) 91 if (r == -1) 92 err(1, "pipe write"); 93 _exit(0); 94 } 95 signal(SIGALRM, handler); 96 ualarm(1 + arc4random() % 10000, 0); 97 close(fds[0]); 98 if ((r = read(fds[1], &c, sizeof(c))) != sizeof(c)) 99 if (r == -1) 100 err(1, "pipe read"); 101 wait(NULL); 102 _exit(0); 103} 104 105int 106main(void) 107{ 108 pid_t pids[PARALLEL], rpid; 109 time_t start; 110 int i, running, status; 111 bool done; 112 113 for (i = 0; i < PARALLEL; i++) 114 pids[i] = 0; 115 running = 0; 116 start = time(NULL); 117 for (;;) { 118 done = (time(NULL) - start) >= RUNTIME; 119 for (i = 0; i < PARALLEL; i++) { 120 if (pids[i] == 0 && !done) { 121 if ((pids[i] = fork()) == 0) 122 test(); 123 if (pids[i] == -1) 124 err(1, "fork()"); 125 running++; 126 } 127 } 128 for (i = 0; i < PARALLEL; i++) { 129 if (pids[i] != 0) { 130 if ((rpid = waitpid(pids[i], &status, 131 WNOHANG)) == -1) 132 err(1, "waitpid(%d)", pids[i]); 133 if (rpid == 0) 134 continue; 135 if (rpid != pids[i]) 136 err(1, "waitpid(%d)", pids[i]); 137 running --; 138 pids[i] = 0; 139 break; 140 } 141 } 142 if (running == 0 && done) 143 break; 144 usleep(100); 145 } 146 147 return (0); 148} 149