1/*-
2 * Copyright (c) 2006 Bruce M. Simpson
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 * $FreeBSD$
27 */
28
29/*
30 * Regression test for uiomove in kernel; specifically for PR kern/38495.
31 */
32
33#include <sys/types.h>
34#include <sys/socket.h>
35#include <sys/un.h>
36
37#include <stdlib.h>
38#include <signal.h>
39#include <setjmp.h>
40#include <string.h>
41#include <err.h>
42#include <errno.h>
43#include <unistd.h>
44
45static char socket_path[] = "tmp.XXXXXX";
46
47static jmp_buf myjmpbuf;
48
49static void handle_sigalrm(int signo __unused)
50{
51	longjmp(myjmpbuf, 1);
52}
53
54int
55main(void)
56{
57	struct sockaddr_un un;
58	pid_t pid;
59	int s;
60
61	if (mkstemp(socket_path) == -1)
62		err(1, "mkstemp");
63	s = socket(PF_LOCAL, SOCK_DGRAM, 0);
64	if (s == -1)
65		errx(-1, "socket");
66	memset(&un, 0, sizeof(un));
67	un.sun_family = AF_LOCAL;
68	unlink(socket_path);
69	strcpy(un.sun_path, socket_path);
70	if (bind(s, (struct sockaddr *)&un, sizeof(un)) == -1)
71		errx(-1, "bind");
72	pid = fork();
73	if (pid == -1)
74		errx(-1, "fork");
75	if (pid == 0) {
76		int conn;
77		char buf[] = "AAAAAAAAA";
78
79		close(s);
80		conn = socket(AF_LOCAL, SOCK_DGRAM, 0);
81		if (conn == -1)
82			errx(-1,"socket");
83		if (sendto(conn, buf, sizeof(buf), 0, (struct sockaddr *)&un,
84		    sizeof(un)) != sizeof(buf))
85			errx(-1,"sendto");
86		close(conn);
87		_exit(0);
88	}
89
90	sleep(5);
91
92	/* Make sure the data is there when we try to receive it. */
93	if (recvfrom(s, (void *)-1, 1, 0, NULL, NULL) != -1)
94		errx(-1,"recvfrom succeeded when failure expected");
95
96	(void)signal(SIGALRM, handle_sigalrm);
97	if (setjmp(myjmpbuf) == 0) {
98		/*
99	 	 * This recvfrom will panic an unpatched system, and block
100		 * a patched one.
101		 */
102		alarm(5);
103		(void)recvfrom(s, (void *)-1, 1, 0, NULL, NULL);
104	}
105
106	/* We should reach here via longjmp() and all should be well. */
107
108	return (0);
109}
110