Repository: containerd/containerd
File: internal/cri/server/podsandbox/sandbox_run.go (Go)

Code before:
	}
	defer func() {
		if retErr != nil && cleanupErr == nil {
			deferCtx, deferCancel := ctrdutil.DeferContext()
			defer deferCancel()
			// Cleanup the volatile sandbox root directory.
			if cleanupErr = ensureRemoveAll(deferCtx, volatileSandboxRootDir); cleanupErr != nil {
				log.G(ctx).WithError(cleanupErr).Errorf("Failed to remove volatile sandbox root directory %q",
					volatileSandboxRootDir)
			}
		}
	}()

	// Create sandbox container.
	// NOTE: sandboxContainerSpec SHOULD NOT have side
	// effect, e.g. accessing/creating files, so that we can test
	// it safely.
	spec, err := c.sandboxContainerSpec(id, config, &image.ImageSpec.Config, metadata.NetNSPath, ociRuntime.PodAnnotations)
	if err != nil {
		return cin, fmt.Errorf("failed to generate sandbox container spec: %w", err)
	}

	//If privileged is enabled, sysfs should have the rw attribute
	if config.Linux.SecurityContext.Privileged {
		for i, k := range spec.Mounts {
			if k.Destination == "/sys" {
				spec.Mounts[i].Options = []string{"nosuid", "noexec", "nodev", "rw"}
				break
			}
		}
	}

	log.G(ctx).WithField("podsandboxid", id).Debugf("sandbox container spec: %#+v", spew.NewFormatter(spec))

	metadata.ProcessLabel = spec.Process.SelinuxLabel
	defer func() {
		if retErr != nil {
			selinux.ReleaseLabel(metadata.ProcessLabel)
		}
	}()
	labels["selinux_label"] = metadata.ProcessLabel

	// handle any KVM based runtime
	if err := modifyProcessLabel(ociRuntime.Type, spec); err != nil {
		return cin, err
	}

	if config.GetLinux().GetSecurityContext().GetPrivileged() {
		// If privileged don't set selinux label, but we still record the MCS label so that
		// the unused label can be freed later.
		spec.Process.SelinuxLabel = ""

Review comment (suggestion):
```suggestion
			if filepath.Clean(k.Destination) == "/sys" {
```

Code after:
			volatileSandboxRootDir, err)
	}
	defer func() {
		if retErr != nil && cleanupErr == nil {
			deferCtx, deferCancel := ctrdutil.DeferContext()
			defer deferCancel()
			// Cleanup the volatile sandbox root directory.
			if cleanupErr = ensureRemoveAll(deferCtx, volatileSandboxRootDir); cleanupErr != nil {
				log.G(ctx).WithError(cleanupErr).Errorf("Failed to remove volatile sandbox root directory %q",
					volatileSandboxRootDir)
			}
		}
	}()

	// Create sandbox container.
	// NOTE: sandboxContainerSpec SHOULD NOT have side
	// effect, e.g. accessing/creating files, so that we can test
	// it safely.
	spec, err := c.sandboxContainerSpec(id, config, &image.ImageSpec.Config, metadata.NetNSPath, ociRuntime.PodAnnotations)
	if err != nil {
		return cin, fmt.Errorf("failed to generate sandbox container spec: %w", err)
	}

	log.G(ctx).WithField("podsandboxid", id).Debugf("sandbox container spec: %#+v", spew.NewFormatter(spec))

	metadata.ProcessLabel = spec.Process.SelinuxLabel
	defer func() {
		if retErr != nil {
			selinux.ReleaseLabel(metadata.ProcessLabel)
		}
	}()
	labels["selinux_label"] = metadata.ProcessLabel

	// handle any KVM based runtime
	if err := modifyProcessLabel(ociRuntime.Type, spec); err != nil {
		return cin, err
	}

	if config.GetLinux().GetSecurityContext().GetPrivileged() {
		// If privileged don't set selinux label, but we still record the MCS label so that
		// the unused label can be freed later.
		spec.Process.SelinuxLabel = ""
		// If privileged is enabled, sysfs should have the rw attribute
		for i, k := range spec.Mounts {
			if filepath.Clean(k.Destination) == "/sys" {
				for j, v := range spec.Mounts[i].Options {
					if v == "ro" {
						spec.Mounts[i].Options[j] = "rw"
						break
					}
				}