1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2018 Michael Moese <mmoese@suse.com>
*/
/* The commit 0fb44559ffd6 af_unix: move unix_mknod() out of bindlock
* changed the behavior of bind() for STREAM UNIX domain sockets if
*/
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tst_kvercmp.h"
#include "tst_test.h"
#include "tst_safe_net.h"
#define SNAME_A "socket.1"
#define SNAME_B "socket.2"
static int sock1, sock2;
static struct sockaddr_un sun1, sun2;
static void run(void)
{
/*
* Once a STREAM UNIX domain socket has been bound, it can't be
* rebound.
*/
TST_EXP_FAIL(bind(sock1, (struct sockaddr *)&sun2, sizeof(sun2)),
EINVAL, "re-bind() socket");
/*
* Since a socket is already bound to the pathname, it can't be bound
* to a second socket. Expected error is EADDRINUSE.
*/
TST_EXP_FAIL(bind(sock2, (struct sockaddr *)&sun1, sizeof(sun1)),
EADDRINUSE, "bind() with bound pathname");
/*
* Kernel is buggy since it creates the node in fileystem first, then
* locks the socket and does all the checks and the node is not removed
* in the error path. For now we will unlink the node here so that the
* test works fine when the run() function is executed in a loop.
* From v5.14-rc1 the kernel has fix above issue.
*/
if (tst_kvercmp(5, 14, 0) >= 0)
TST_EXP_FAIL(unlink(SNAME_B), ENOENT, "check exist of SNAME_B");
else
unlink(SNAME_B);
}
static void setup(void)
{
sock1 = SAFE_SOCKET(PF_UNIX, SOCK_STREAM, 0);
sock2 = SAFE_SOCKET(PF_UNIX, SOCK_STREAM, 0);
sun1.sun_family = AF_UNIX;
sun2.sun_family = AF_UNIX;
if (sprintf(sun1.sun_path, "%s", SNAME_A) < (int) strlen(SNAME_A)) {
tst_res(TFAIL, "sprintf failed");
return;
}
if (sprintf(sun2.sun_path, "%s", SNAME_B) < (int) strlen(SNAME_B)) {
tst_res(TFAIL, "sprintf failed");
return;
}
SAFE_BIND(sock1, (struct sockaddr *)&sun1, sizeof(sun1));
}
static void cleanup(void)
{
SAFE_CLOSE(sock1);
SAFE_CLOSE(sock2);
}
static struct tst_test test = {
.setup = setup,
.cleanup = cleanup,
.test_all = run,
.needs_tmpdir = 1,
};
|
