1 /*- 2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 /* Test lockf(3) with overlapping ranges */ 29 30 /* Provoked: 31 lock order reversal: 32 1st 0xc50057a0 vnode interlock (vnode interlock) @ kern/kern_lockf.c:190 33 2nd 0xc14710e8 system map (system map) @ vm/vm_kern.c:296 34 */ 35 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 #include <fcntl.h> 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <strings.h> 43 #include <errno.h> 44 #include <err.h> 45 46 #include <stress.h> 47 48 char file[128]; 49 int fd; 50 51 int 52 setup(int nb) 53 { 54 int i; 55 char buf[1024]; 56 57 sprintf(file, "lockf.%d", getpid()); 58 if ((fd = open(file,O_CREAT | O_TRUNC | O_RDWR, 0600)) == -1) 59 err(1, "creat(%s)", file); 60 bzero(buf, sizeof(buf)); 61 for (i = 0; i < 1024; i++) 62 if (write(fd, &buf, sizeof(buf)) != sizeof(buf)) 63 err(1, "write"); 64 close(fd); 65 return (0); 66 } 67 68 void 69 cleanup(void) 70 { 71 unlink(file); 72 } 73 74 int 75 test(void) 76 { 77 int i; 78 off_t pos; 79 off_t size; 80 81 if ((fd = open(file, O_RDWR, 0600)) == -1) 82 err(1, "open(%s)", file); 83 84 for (i = 0; i < 1024; i++) { 85 pos = random_int(0, 1024 * 1024 - 1); 86 if (lseek(fd, pos, SEEK_SET) == -1) 87 err(1, "lseek"); 88 size = random_int(1, 1024 * 1024 - pos); 89 if (size > 64) 90 size = 64; 91 if (lockf(fd, F_LOCK, size) == -1) 92 err(1, "lockf(%s, F_LOCK)", file); 93 size = random_int(1, size); 94 if (lockf(fd, F_ULOCK, size) == -1) 95 err(1, "lockf(%s, F_ULOCK)", file); 96 97 } 98 close(fd); 99 100 return (0); 101 } 102