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Diffstat (limited to 'vendor/github.com/opencontainers/runc/libcontainer/standard_init_linux.go')
-rw-r--r--vendor/github.com/opencontainers/runc/libcontainer/standard_init_linux.go193
1 files changed, 0 insertions, 193 deletions
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/standard_init_linux.go b/vendor/github.com/opencontainers/runc/libcontainer/standard_init_linux.go
deleted file mode 100644
index 02ea753ed..000000000
--- a/vendor/github.com/opencontainers/runc/libcontainer/standard_init_linux.go
+++ /dev/null
@@ -1,193 +0,0 @@
-// +build linux
-
-package libcontainer
-
-import (
- "fmt"
- "os"
- "os/exec"
- "syscall" //only for Exec
-
- "github.com/opencontainers/runc/libcontainer/apparmor"
- "github.com/opencontainers/runc/libcontainer/configs"
- "github.com/opencontainers/runc/libcontainer/keys"
- "github.com/opencontainers/runc/libcontainer/seccomp"
- "github.com/opencontainers/runc/libcontainer/system"
- "github.com/opencontainers/selinux/go-selinux/label"
-
- "golang.org/x/sys/unix"
-)
-
-type linuxStandardInit struct {
- pipe *os.File
- consoleSocket *os.File
- parentPid int
- fifoFd int
- config *initConfig
-}
-
-func (l *linuxStandardInit) getSessionRingParams() (string, uint32, uint32) {
- var newperms uint32
-
- if l.config.Config.Namespaces.Contains(configs.NEWUSER) {
- // With user ns we need 'other' search permissions.
- newperms = 0x8
- } else {
- // Without user ns we need 'UID' search permissions.
- newperms = 0x80000
- }
-
- // Create a unique per session container name that we can join in setns;
- // However, other containers can also join it.
- return fmt.Sprintf("_ses.%s", l.config.ContainerId), 0xffffffff, newperms
-}
-
-func (l *linuxStandardInit) Init() error {
- if !l.config.Config.NoNewKeyring {
- ringname, keepperms, newperms := l.getSessionRingParams()
-
- // Do not inherit the parent's session keyring.
- sessKeyId, err := keys.JoinSessionKeyring(ringname)
- if err != nil {
- return err
- }
- // Make session keyring searcheable.
- if err := keys.ModKeyringPerm(sessKeyId, keepperms, newperms); err != nil {
- return err
- }
- }
-
- if err := setupNetwork(l.config); err != nil {
- return err
- }
- if err := setupRoute(l.config.Config); err != nil {
- return err
- }
-
- label.Init()
- if err := prepareRootfs(l.pipe, l.config); err != nil {
- return err
- }
- // Set up the console. This has to be done *before* we finalize the rootfs,
- // but *after* we've given the user the chance to set up all of the mounts
- // they wanted.
- if l.config.CreateConsole {
- if err := setupConsole(l.consoleSocket, l.config, true); err != nil {
- return err
- }
- if err := system.Setctty(); err != nil {
- return err
- }
- }
-
- // Finish the rootfs setup.
- if l.config.Config.Namespaces.Contains(configs.NEWNS) {
- if err := finalizeRootfs(l.config.Config); err != nil {
- return err
- }
- }
-
- if hostname := l.config.Config.Hostname; hostname != "" {
- if err := unix.Sethostname([]byte(hostname)); err != nil {
- return err
- }
- }
- if err := apparmor.ApplyProfile(l.config.AppArmorProfile); err != nil {
- return err
- }
- if err := label.SetProcessLabel(l.config.ProcessLabel); err != nil {
- return err
- }
-
- for key, value := range l.config.Config.Sysctl {
- if err := writeSystemProperty(key, value); err != nil {
- return err
- }
- }
- for _, path := range l.config.Config.ReadonlyPaths {
- if err := readonlyPath(path); err != nil {
- return err
- }
- }
- for _, path := range l.config.Config.MaskPaths {
- if err := maskPath(path); err != nil {
- return err
- }
- }
- pdeath, err := system.GetParentDeathSignal()
- if err != nil {
- return err
- }
- if l.config.NoNewPrivileges {
- if err := unix.Prctl(unix.PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0); err != nil {
- return err
- }
- }
- // Tell our parent that we're ready to Execv. This must be done before the
- // Seccomp rules have been applied, because we need to be able to read and
- // write to a socket.
- if err := syncParentReady(l.pipe); err != nil {
- return err
- }
- // Without NoNewPrivileges seccomp is a privileged operation, so we need to
- // do this before dropping capabilities; otherwise do it as late as possible
- // just before execve so as few syscalls take place after it as possible.
- if l.config.Config.Seccomp != nil && !l.config.NoNewPrivileges {
- if err := seccomp.InitSeccomp(l.config.Config.Seccomp); err != nil {
- return err
- }
- }
- if err := finalizeNamespace(l.config); err != nil {
- return err
- }
- // finalizeNamespace can change user/group which clears the parent death
- // signal, so we restore it here.
- if err := pdeath.Restore(); err != nil {
- return err
- }
- // Compare the parent from the initial start of the init process and make
- // sure that it did not change. if the parent changes that means it died
- // and we were reparented to something else so we should just kill ourself
- // and not cause problems for someone else.
- if unix.Getppid() != l.parentPid {
- return unix.Kill(unix.Getpid(), unix.SIGKILL)
- }
- // Check for the arg before waiting to make sure it exists and it is
- // returned as a create time error.
- name, err := exec.LookPath(l.config.Args[0])
- if err != nil {
- return err
- }
- // Close the pipe to signal that we have completed our init.
- l.pipe.Close()
- // Wait for the FIFO to be opened on the other side before exec-ing the
- // user process. We open it through /proc/self/fd/$fd, because the fd that
- // was given to us was an O_PATH fd to the fifo itself. Linux allows us to
- // re-open an O_PATH fd through /proc.
- fd, err := unix.Open(fmt.Sprintf("/proc/self/fd/%d", l.fifoFd), unix.O_WRONLY|unix.O_CLOEXEC, 0)
- if err != nil {
- return newSystemErrorWithCause(err, "open exec fifo")
- }
- if _, err := unix.Write(fd, []byte("0")); err != nil {
- return newSystemErrorWithCause(err, "write 0 exec fifo")
- }
- // Close the O_PATH fifofd fd before exec because the kernel resets
- // dumpable in the wrong order. This has been fixed in newer kernels, but
- // we keep this to ensure CVE-2016-9962 doesn't re-emerge on older kernels.
- // N.B. the core issue itself (passing dirfds to the host filesystem) has
- // since been resolved.
- // https://github.com/torvalds/linux/blob/v4.9/fs/exec.c#L1290-L1318
- unix.Close(l.fifoFd)
- // Set seccomp as close to execve as possible, so as few syscalls take
- // place afterward (reducing the amount of syscalls that users need to
- // enable in their seccomp profiles).
- if l.config.Config.Seccomp != nil && l.config.NoNewPrivileges {
- if err := seccomp.InitSeccomp(l.config.Config.Seccomp); err != nil {
- return newSystemErrorWithCause(err, "init seccomp")
- }
- }
- if err := syscall.Exec(name, l.config.Args[0:], os.Environ()); err != nil {
- return newSystemErrorWithCause(err, "exec user process")
- }
- return nil
-}