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rebase: update kubernetes and libraries to v1.22.0 version
Kubernetes v1.22 version has been released and this update ceph csi dependencies to use the same version. Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
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mergify[bot]
parent
e077c1fdf5
commit
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177
vendor/github.com/opencontainers/runc/libcontainer/utils/utils.go
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177
vendor/github.com/opencontainers/runc/libcontainer/utils/utils.go
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package utils
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import (
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"encoding/binary"
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"encoding/json"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"unsafe"
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"github.com/cyphar/filepath-securejoin"
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"golang.org/x/sys/unix"
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)
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const (
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exitSignalOffset = 128
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)
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// NativeEndian is the native byte order of the host system.
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var NativeEndian binary.ByteOrder
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func init() {
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// Copied from <golang.org/x/net/internal/socket/sys.go>.
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i := uint32(1)
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b := (*[4]byte)(unsafe.Pointer(&i))
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if b[0] == 1 {
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NativeEndian = binary.LittleEndian
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} else {
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NativeEndian = binary.BigEndian
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}
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}
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// ResolveRootfs ensures that the current working directory is
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// not a symlink and returns the absolute path to the rootfs
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func ResolveRootfs(uncleanRootfs string) (string, error) {
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rootfs, err := filepath.Abs(uncleanRootfs)
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if err != nil {
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return "", err
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}
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return filepath.EvalSymlinks(rootfs)
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}
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// ExitStatus returns the correct exit status for a process based on if it
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// was signaled or exited cleanly
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func ExitStatus(status unix.WaitStatus) int {
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if status.Signaled() {
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return exitSignalOffset + int(status.Signal())
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}
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return status.ExitStatus()
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}
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// WriteJSON writes the provided struct v to w using standard json marshaling
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func WriteJSON(w io.Writer, v interface{}) error {
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data, err := json.Marshal(v)
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if err != nil {
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return err
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}
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_, err = w.Write(data)
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return err
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}
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// CleanPath makes a path safe for use with filepath.Join. This is done by not
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// only cleaning the path, but also (if the path is relative) adding a leading
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// '/' and cleaning it (then removing the leading '/'). This ensures that a
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// path resulting from prepending another path will always resolve to lexically
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// be a subdirectory of the prefixed path. This is all done lexically, so paths
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// that include symlinks won't be safe as a result of using CleanPath.
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func CleanPath(path string) string {
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// Deal with empty strings nicely.
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if path == "" {
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return ""
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}
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// Ensure that all paths are cleaned (especially problematic ones like
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// "/../../../../../" which can cause lots of issues).
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path = filepath.Clean(path)
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// If the path isn't absolute, we need to do more processing to fix paths
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// such as "../../../../<etc>/some/path". We also shouldn't convert absolute
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// paths to relative ones.
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if !filepath.IsAbs(path) {
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path = filepath.Clean(string(os.PathSeparator) + path)
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// This can't fail, as (by definition) all paths are relative to root.
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path, _ = filepath.Rel(string(os.PathSeparator), path)
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}
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// Clean the path again for good measure.
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return filepath.Clean(path)
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}
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// stripRoot returns the passed path, stripping the root path if it was
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// (lexicially) inside it. Note that both passed paths will always be treated
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// as absolute, and the returned path will also always be absolute. In
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// addition, the paths are cleaned before stripping the root.
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func stripRoot(root, path string) string {
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// Make the paths clean and absolute.
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root, path = CleanPath("/"+root), CleanPath("/"+path)
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switch {
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case path == root:
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path = "/"
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case root == "/":
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// do nothing
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case strings.HasPrefix(path, root+"/"):
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path = strings.TrimPrefix(path, root+"/")
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}
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return CleanPath("/" + path)
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}
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// WithProcfd runs the passed closure with a procfd path (/proc/self/fd/...)
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// corresponding to the unsafePath resolved within the root. Before passing the
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// fd, this path is verified to have been inside the root -- so operating on it
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// through the passed fdpath should be safe. Do not access this path through
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// the original path strings, and do not attempt to use the pathname outside of
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// the passed closure (the file handle will be freed once the closure returns).
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func WithProcfd(root, unsafePath string, fn func(procfd string) error) error {
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// Remove the root then forcefully resolve inside the root.
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unsafePath = stripRoot(root, unsafePath)
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path, err := securejoin.SecureJoin(root, unsafePath)
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if err != nil {
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return fmt.Errorf("resolving path inside rootfs failed: %v", err)
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}
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// Open the target path.
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fh, err := os.OpenFile(path, unix.O_PATH|unix.O_CLOEXEC, 0)
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if err != nil {
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return fmt.Errorf("open o_path procfd: %w", err)
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}
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defer fh.Close()
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// Double-check the path is the one we expected.
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procfd := "/proc/self/fd/" + strconv.Itoa(int(fh.Fd()))
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if realpath, err := os.Readlink(procfd); err != nil {
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return fmt.Errorf("procfd verification failed: %w", err)
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} else if realpath != path {
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return fmt.Errorf("possibly malicious path detected -- refusing to operate on %s", realpath)
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}
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// Run the closure.
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return fn(procfd)
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}
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// SearchLabels searches a list of key-value pairs for the provided key and
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// returns the corresponding value. The pairs must be separated with '='.
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func SearchLabels(labels []string, query string) string {
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for _, l := range labels {
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parts := strings.SplitN(l, "=", 2)
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if len(parts) < 2 {
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continue
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}
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if parts[0] == query {
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return parts[1]
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}
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}
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return ""
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}
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// Annotations returns the bundle path and user defined annotations from the
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// libcontainer state. We need to remove the bundle because that is a label
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// added by libcontainer.
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func Annotations(labels []string) (bundle string, userAnnotations map[string]string) {
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userAnnotations = make(map[string]string)
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for _, l := range labels {
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parts := strings.SplitN(l, "=", 2)
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if len(parts) < 2 {
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continue
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}
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if parts[0] == "bundle" {
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bundle = parts[1]
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} else {
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userAnnotations[parts[0]] = parts[1]
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}
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}
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return
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}
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