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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Test binary used to test that seccomp filters are properly constructed and
// indeed kill the process on violation.
package main
import (
"flag"
"fmt"
"os"
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/seccomp"
)
func main() {
dieFlag := flag.Bool("die", false, "trips over the filter if true")
flag.Parse()
syscalls := seccomp.SyscallRules{
unix.SYS_ACCEPT: {},
unix.SYS_BIND: {},
unix.SYS_BRK: {},
unix.SYS_CLOCK_GETTIME: {},
unix.SYS_CLONE: {},
unix.SYS_CLOSE: {},
unix.SYS_DUP: {},
unix.SYS_DUP3: {},
unix.SYS_EPOLL_CREATE1: {},
unix.SYS_EPOLL_CTL: {},
unix.SYS_EPOLL_PWAIT: {},
unix.SYS_EXIT: {},
unix.SYS_EXIT_GROUP: {},
unix.SYS_FALLOCATE: {},
unix.SYS_FCHMOD: {},
unix.SYS_FCNTL: {},
unix.SYS_FSTAT: {},
unix.SYS_FSYNC: {},
unix.SYS_FTRUNCATE: {},
unix.SYS_FUTEX: {},
unix.SYS_GETDENTS64: {},
unix.SYS_GETPEERNAME: {},
unix.SYS_GETPID: {},
unix.SYS_GETSOCKNAME: {},
unix.SYS_GETSOCKOPT: {},
unix.SYS_GETTID: {},
unix.SYS_GETTIMEOFDAY: {},
unix.SYS_LISTEN: {},
unix.SYS_LSEEK: {},
unix.SYS_MADVISE: {},
unix.SYS_MINCORE: {},
unix.SYS_MMAP: {},
unix.SYS_MPROTECT: {},
unix.SYS_MUNLOCK: {},
unix.SYS_MUNMAP: {},
unix.SYS_NANOSLEEP: {},
unix.SYS_PPOLL: {},
unix.SYS_PREAD64: {},
unix.SYS_PSELECT6: {},
unix.SYS_PWRITE64: {},
unix.SYS_READ: {},
unix.SYS_READLINKAT: {},
unix.SYS_READV: {},
unix.SYS_RECVMSG: {},
unix.SYS_RENAMEAT: {},
unix.SYS_RESTART_SYSCALL: {},
unix.SYS_RT_SIGACTION: {},
unix.SYS_RT_SIGPROCMASK: {},
unix.SYS_RT_SIGRETURN: {},
unix.SYS_SCHED_YIELD: {},
unix.SYS_SENDMSG: {},
unix.SYS_SETITIMER: {},
unix.SYS_SET_ROBUST_LIST: {},
unix.SYS_SETSOCKOPT: {},
unix.SYS_SHUTDOWN: {},
unix.SYS_SIGALTSTACK: {},
unix.SYS_SOCKET: {},
unix.SYS_SYNC_FILE_RANGE: {},
unix.SYS_TGKILL: {},
unix.SYS_UTIMENSAT: {},
unix.SYS_WRITE: {},
unix.SYS_WRITEV: {},
}
arch_syscalls(syscalls)
die := *dieFlag
if !die {
syscalls[unix.SYS_OPENAT] = []seccomp.Rule{
{
seccomp.EqualTo(10),
},
}
}
if err := seccomp.Install(syscalls); err != nil {
fmt.Printf("Failed to install seccomp: %v", err)
os.Exit(1)
}
fmt.Printf("Filters installed\n")
unix.RawSyscall(unix.SYS_OPENAT, 10, 0, 0)
fmt.Printf("Syscall was allowed!!!\n")
}
|
