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
|
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "cgroup_helpers.h"
#include "network_helpers.h"
#include "sock_ops_get_sk.skel.h"
/* See progs/sock_ops_get_sk.c for the bug description. */
static void run_sock_ops_test(int cgroup_fd, int prog_fd)
{
int server_fd, client_fd, err;
err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_SOCK_OPS, 0);
if (!ASSERT_OK(err, "prog_attach"))
return;
server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
if (!ASSERT_OK_FD(server_fd, "start_server"))
goto detach;
/* Trigger TCP handshake which causes TCP_NEW_SYN_RECV state where
* is_fullsock == 0 and is_locked_tcp_sock == 0.
*/
client_fd = connect_to_fd(server_fd, 0);
if (!ASSERT_OK_FD(client_fd, "connect_to_fd"))
goto close_server;
close(client_fd);
close_server:
close(server_fd);
detach:
bpf_prog_detach(cgroup_fd, BPF_CGROUP_SOCK_OPS);
}
void test_ns_sock_ops_get_sk(void)
{
struct sock_ops_get_sk *skel;
int cgroup_fd;
cgroup_fd = test__join_cgroup("/sock_ops_get_sk");
if (!ASSERT_OK_FD(cgroup_fd, "join_cgroup"))
return;
skel = sock_ops_get_sk__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel_open_load"))
goto close_cgroup;
/* Test SOCK_OPS_GET_SK with same src/dst register */
if (test__start_subtest("get_sk")) {
run_sock_ops_test(cgroup_fd,
bpf_program__fd(skel->progs.sock_ops_get_sk_same_reg));
ASSERT_EQ(skel->bss->null_seen, 1, "null_seen");
ASSERT_EQ(skel->bss->bug_detected, 0, "bug_not_detected");
}
/* Test SOCK_OPS_GET_FIELD with same src/dst register */
if (test__start_subtest("get_field")) {
run_sock_ops_test(cgroup_fd,
bpf_program__fd(skel->progs.sock_ops_get_field_same_reg));
ASSERT_EQ(skel->bss->field_null_seen, 1, "field_null_seen");
ASSERT_EQ(skel->bss->field_bug_detected, 0, "field_bug_not_detected");
}
/* Test SOCK_OPS_GET_SK with different src/dst register */
if (test__start_subtest("get_sk_diff_reg")) {
run_sock_ops_test(cgroup_fd,
bpf_program__fd(skel->progs.sock_ops_get_sk_diff_reg));
ASSERT_EQ(skel->bss->diff_reg_null_seen, 1, "diff_reg_null_seen");
ASSERT_EQ(skel->bss->diff_reg_bug_detected, 0, "diff_reg_bug_not_detected");
}
sock_ops_get_sk__destroy(skel);
close_cgroup:
close(cgroup_fd);
}
|
