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
setup(int nb)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
cleanup(void)69 cleanup(void)
70 {
71 unlink(file);
72 }
73
74 int
test(void)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