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// 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"
"syscall"
"gvisor.dev/gvisor/pkg/seccomp"
)
func main() {
dieFlag := flag.Bool("die", false, "trips over the filter if true")
flag.Parse()
syscalls := seccomp.SyscallRules{
syscall.SYS_ACCEPT: {},
syscall.SYS_BIND: {},
syscall.SYS_BRK: {},
syscall.SYS_CLOCK_GETTIME: {},
syscall.SYS_CLONE: {},
syscall.SYS_CLOSE: {},
syscall.SYS_DUP: {},
syscall.SYS_DUP3: {},
syscall.SYS_EPOLL_CREATE1: {},
syscall.SYS_EPOLL_CTL: {},
syscall.SYS_EPOLL_PWAIT: {},
syscall.SYS_EXIT: {},
syscall.SYS_EXIT_GROUP: {},
syscall.SYS_FALLOCATE: {},
syscall.SYS_FCHMOD: {},
syscall.SYS_FCNTL: {},
syscall.SYS_FSTAT: {},
syscall.SYS_FSYNC: {},
syscall.SYS_FTRUNCATE: {},
syscall.SYS_FUTEX: {},
syscall.SYS_GETDENTS64: {},
syscall.SYS_GETPEERNAME: {},
syscall.SYS_GETPID: {},
syscall.SYS_GETSOCKNAME: {},
syscall.SYS_GETSOCKOPT: {},
syscall.SYS_GETTID: {},
syscall.SYS_GETTIMEOFDAY: {},
syscall.SYS_LISTEN: {},
syscall.SYS_LSEEK: {},
syscall.SYS_MADVISE: {},
syscall.SYS_MINCORE: {},
syscall.SYS_MMAP: {},
syscall.SYS_MPROTECT: {},
syscall.SYS_MUNLOCK: {},
syscall.SYS_MUNMAP: {},
syscall.SYS_NANOSLEEP: {},
syscall.SYS_PPOLL: {},
syscall.SYS_PREAD64: {},
syscall.SYS_PSELECT6: {},
syscall.SYS_PWRITE64: {},
syscall.SYS_READ: {},
syscall.SYS_READLINKAT: {},
syscall.SYS_READV: {},
syscall.SYS_RECVMSG: {},
syscall.SYS_RENAMEAT: {},
syscall.SYS_RESTART_SYSCALL: {},
syscall.SYS_RT_SIGACTION: {},
syscall.SYS_RT_SIGPROCMASK: {},
syscall.SYS_RT_SIGRETURN: {},
syscall.SYS_SCHED_YIELD: {},
syscall.SYS_SENDMSG: {},
syscall.SYS_SETITIMER: {},
syscall.SYS_SET_ROBUST_LIST: {},
syscall.SYS_SETSOCKOPT: {},
syscall.SYS_SHUTDOWN: {},
syscall.SYS_SIGALTSTACK: {},
syscall.SYS_SOCKET: {},
syscall.SYS_SYNC_FILE_RANGE: {},
syscall.SYS_TGKILL: {},
syscall.SYS_UTIMENSAT: {},
syscall.SYS_WRITE: {},
syscall.SYS_WRITEV: {},
}
arch_syscalls(syscalls)
die := *dieFlag
if !die {
syscalls[syscall.SYS_OPENAT] = []seccomp.Rule{
{
seccomp.AllowValue(10),
},
}
}
if err := seccomp.Install(syscalls); err != nil {
fmt.Printf("Failed to install seccomp: %v", err)
os.Exit(1)
}
fmt.Printf("Filters installed\n")
syscall.RawSyscall(syscall.SYS_OPENAT, 10, 0, 0)
fmt.Printf("Syscall was allowed!!!\n")
}
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