1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause 5# 6# Copyright (c) 2016 Mark Johnston <markj@FreeBSD.org> 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# Reproduce problem reported as PR 211531. 31# https://reviews.freebsd.org/D7398 32 33# "panic: __rw_wlock_hard: recursing but non-recursive rw unp_link_rwlock @ 34# ../../../kern/uipc_usrreq.c:655" seen: 35# https://people.freebsd.org/~pho/stress/log/unix_socket_detach.txt 36# Fixed in r303855. 37 38. ../default.cfg 39 40cd /tmp 41cat > unix_socket_detach.c <<EOF 42#include <sys/types.h> 43#include <sys/socket.h> 44#include <sys/un.h> 45 46#include <err.h> 47#include <fcntl.h> 48#include <signal.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <string.h> 52#include <unistd.h> 53 54static void 55handler(int i __unused) { 56 _exit(0); 57} 58 59int 60main(void) 61{ 62 struct sockaddr_un sun; 63 char *file; 64 pid_t pid; 65 int sd, flags, one; 66 67 file = "unix_socket_detach.socket"; 68 memset(&sun, 0, sizeof(sun)); 69 sun.sun_family = AF_LOCAL; 70 sun.sun_len = sizeof(sun); 71 snprintf(sun.sun_path, sizeof(sun.sun_path), "%s", file); 72 73 signal(SIGALRM, handler); 74 pid = fork(); 75 if (pid < 0) 76 err(1, "fork"); 77 if (pid == 0) { 78 alarm(300); 79 for (;;) { 80 sd = socket(PF_LOCAL, SOCK_STREAM, 0); 81 if (sd < 0) 82 err(1, "socket"); 83 one = 1; 84 if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &one, 85 sizeof(one)) < 0) 86 err(1, "setsockopt"); 87 if (bind(sd, (struct sockaddr *)&sun, sizeof(sun)) < 0) { 88 close(sd); 89 continue; 90 } 91 if (listen(sd, 10) != 0) 92 err(1, "listen"); 93 usleep(random() % 10); 94 (void)close(sd); 95 (void)unlink(file); 96 } 97 } else { 98 alarm(300); 99 for (;;) { 100 sd = socket(PF_LOCAL, SOCK_STREAM, 0); 101 if (sd < 0) 102 err(1, "socket"); 103 if ((flags = fcntl(sd, F_GETFL, 0)) < 0) 104 err(1, "fcntl(F_GETFL)"); 105 flags |= O_NONBLOCK; 106 if (fcntl(sd, F_SETFL, flags) < 0) 107 err(1, "fcntl(F_SETFL)"); 108 (void)connect(sd, (struct sockaddr *)&sun, sizeof(sun)); 109 usleep(random() % 10); 110 (void)close(sd); 111 } 112 } 113 return (0); 114} 115EOF 116 117mycc -o unix_socket_detach -Wall -Wextra -O2 -g unix_socket_detach.c || exit 1 118 119rm -f unix_socket_detach.socket 120/tmp/unix_socket_detach 121s=$? 122 123rm -f unix_socket_detach.c unix_socket_detach unix_socket_detach.socket 124exit $s 125