package seccomp import ( "runtime" "github.com/opencontainers/runtime-spec/specs-go" rspec "github.com/opencontainers/runtime-spec/specs-go" ) func arches() []rspec.Arch { native := runtime.GOARCH switch native { case "amd64": return []rspec.Arch{rspec.ArchX86_64, rspec.ArchX86, rspec.ArchX32} case "arm64": return []rspec.Arch{rspec.ArchARM, rspec.ArchAARCH64} case "mips64": return []rspec.Arch{rspec.ArchMIPS, rspec.ArchMIPS64, rspec.ArchMIPS64N32} case "mips64n32": return []rspec.Arch{rspec.ArchMIPS, rspec.ArchMIPS64, rspec.ArchMIPS64N32} case "mipsel64": return []rspec.Arch{rspec.ArchMIPSEL, rspec.ArchMIPSEL64, rspec.ArchMIPSEL64N32} case "mipsel64n32": return []rspec.Arch{rspec.ArchMIPSEL, rspec.ArchMIPSEL64, rspec.ArchMIPSEL64N32} case "s390x": return []rspec.Arch{rspec.ArchS390, rspec.ArchS390X} default: return []rspec.Arch{} } } // DefaultProfile defines the whitelist for the default seccomp profile. func DefaultProfile(rs *specs.Spec) *rspec.LinuxSeccomp { syscalls := []rspec.LinuxSyscall{ { Names: []string{ "accept", "accept4", "access", "alarm", "bind", "brk", "capget", "capset", "chdir", "chmod", "chown", "chown32", "clock_getres", "clock_gettime", "clock_nanosleep", "close", "connect", "copy_file_range", "creat", "dup", "dup2", "dup3", "epoll_create", "epoll_create1", "epoll_ctl", "epoll_ctl_old", "epoll_pwait", "epoll_wait", "epoll_wait_old", "eventfd", "eventfd2", "execve", "execveat", "exit", "exit_group", "faccessat", "fadvise64", "fadvise64_64", "fallocate", "fanotify_mark", "fchdir", "fchmod", "fchmodat", "fchown", "fchown32", "fchownat", "fcntl", "fcntl64", "fdatasync", "fgetxattr", "flistxattr", "flock", "fork", "fremovexattr", "fsetxattr", "fstat", "fstat64", "fstatat64", "fstatfs", "fstatfs64", "fsync", "ftruncate", "ftruncate64", "futex", "futimesat", "getcpu", "getcwd", "getdents", "getdents64", "getegid", "getegid32", "geteuid", "geteuid32", "getgid", "getgid32", "getgroups", "getgroups32", "getitimer", "getpeername", "getpgid", "getpgrp", "getpid", "getppid", "getpriority", "getrandom", "getresgid", "getresgid32", "getresuid", "getresuid32", "getrlimit", "get_robust_list", "getrusage", "getsid", "getsockname", "getsockopt", "get_thread_area", "gettid", "gettimeofday", "getuid", "getuid32", "getxattr", "inotify_add_watch", "inotify_init", "inotify_init1", "inotify_rm_watch", "io_cancel", "ioctl", "io_destroy", "io_getevents", "ioprio_get", "ioprio_set", "io_setup", "io_submit", "ipc", "kill", "lchown", "lchown32", "lgetxattr", "link", "linkat", "listen", "listxattr", "llistxattr", "_llseek", "lremovexattr", "lseek", "lsetxattr", "lstat", "lstat64", "madvise", "memfd_create", "mincore", "mkdir", "mkdirat", "mknod", "mknodat", "mlock", "mlock2", "mlockall", "mmap", "mmap2", "mprotect", "mq_getsetattr", "mq_notify", "mq_open", "mq_timedreceive", "mq_timedsend", "mq_unlink", "mremap", "msgctl", "msgget", "msgrcv", "msgsnd", "msync", "munlock", "munlockall", "munmap", "nanosleep", "newfstatat", "_newselect", "open", "openat", "pause", "pipe", "pipe2", "poll", "ppoll", "prctl", "pread64", "preadv", "prlimit64", "pselect6", "pwrite64", "pwritev", "read", "readahead", "readlink", "readlinkat", "readv", "recv", "recvfrom", "recvmmsg", "recvmsg", "remap_file_pages", "removexattr", "rename", "renameat", "renameat2", "restart_syscall", "rmdir", "rt_sigaction", "rt_sigpending", "rt_sigprocmask", "rt_sigqueueinfo", "rt_sigreturn", "rt_sigsuspend", "rt_sigtimedwait", "rt_tgsigqueueinfo", "sched_getaffinity", "sched_getattr", "sched_getparam", "sched_get_priority_max", "sched_get_priority_min", "sched_getscheduler", "sched_rr_get_interval", "sched_setaffinity", "sched_setattr", "sched_setparam", "sched_setscheduler", "sched_yield", "seccomp", "select", "semctl", "semget", "semop", "semtimedop", "send", "sendfile", "sendfile64", "sendmmsg", "sendmsg", "sendto", "setfsgid", "setfsgid32", "setfsuid", "setfsuid32", "setgid", "setgid32", "setgroups", "setgroups32", "setitimer", "setpgid", "setpriority", "setregid", "setregid32", "setresgid", "setresgid32", "setresuid", "setresuid32", "setreuid", "setreuid32", "setrlimit", "set_robust_list", "setsid", "setsockopt", "set_thread_area", "set_tid_address", "setuid", "setuid32", "setxattr", "shmat", "shmctl", "shmdt", "shmget", "shutdown", "sigaltstack", "signalfd", "signalfd4", "sigreturn", "socket", "socketcall", "socketpair", "splice", "stat", "stat64", "statfs", "statfs64", "symlink", "symlinkat", "sync", "sync_file_range", "syncfs", "sysinfo", "syslog", "tee", "tgkill", "time", "timer_create", "timer_delete", "timerfd_create", "timerfd_gettime", "timerfd_settime", "timer_getoverrun", "timer_gettime", "timer_settime", "times", "tkill", "truncate", "truncate64", "ugetrlimit", "umask", "uname", "unlink", "unlinkat", "utime", "utimensat", "utimes", "vfork", "vmsplice", "wait4", "waitid", "waitpid", "write", "writev", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, { Names: []string{"personality"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{ { Index: 0, Value: 0x0, Op: rspec.OpEqualTo, }, { Index: 0, Value: 0x0008, Op: rspec.OpEqualTo, }, { Index: 0, Value: 0xffffffff, Op: rspec.OpEqualTo, }, }, }, } var sysCloneFlagsIndex uint capSysAdmin := false caps := make(map[string]bool) for _, cap := range rs.Process.Capabilities.Bounding { caps[cap] = true } for _, cap := range rs.Process.Capabilities.Effective { caps[cap] = true } for _, cap := range rs.Process.Capabilities.Inheritable { caps[cap] = true } for _, cap := range rs.Process.Capabilities.Permitted { caps[cap] = true } for _, cap := range rs.Process.Capabilities.Ambient { caps[cap] = true } for cap := range caps { switch cap { case "CAP_DAC_READ_SEARCH": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"open_by_handle_at"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_ADMIN": capSysAdmin = true syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "bpf", "clone", "fanotify_init", "lookup_dcookie", "mount", "name_to_handle_at", "perf_event_open", "setdomainname", "sethostname", "setns", "umount", "umount2", "unshare", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_BOOT": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"reboot"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_CHROOT": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"chroot"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_MODULE": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "delete_module", "init_module", "finit_module", "query_module", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_PACCT": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"acct"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_PTRACE": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "kcmp", "process_vm_readv", "process_vm_writev", "ptrace", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_RAWIO": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "iopl", "ioperm", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_TIME": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "settimeofday", "stime", "adjtimex", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "CAP_SYS_TTY_CONFIG": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"vhangup"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) } } if !capSysAdmin { syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"clone"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{ { Index: sysCloneFlagsIndex, Value: CloneNewNS | CloneNewUTS | CloneNewIPC | CloneNewUser | CloneNewPID | CloneNewNet, ValueTwo: 0, Op: rspec.OpMaskedEqual, }, }, }, }...) } arch := runtime.GOARCH switch arch { case "arm", "arm64": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "breakpoint", "cacheflush", "set_tls", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "amd64", "x32": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"arch_prctl"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) fallthrough case "x86": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{"modify_ldt"}, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) case "s390", "s390x": syscalls = append(syscalls, []rspec.LinuxSyscall{ { Names: []string{ "s390_pci_mmio_read", "s390_pci_mmio_write", "s390_runtime_instr", }, Action: rspec.ActAllow, Args: []rspec.LinuxSeccompArg{}, }, }...) /* Flags parameter of the clone syscall is the 2nd on s390 */ } return &rspec.LinuxSeccomp{ DefaultAction: rspec.ActErrno, Architectures: arches(), Syscalls: syscalls, } }