diff options
| -rw-r--r-- | pkg/sentry/fs/mount_overlay.go | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/pkg/sentry/fs/mount_overlay.go b/pkg/sentry/fs/mount_overlay.go index 4fcdd6c01..299712cd7 100644 --- a/pkg/sentry/fs/mount_overlay.go +++ b/pkg/sentry/fs/mount_overlay.go @@ -66,13 +66,17 @@ func (o *overlayMountSourceOperations) Revalidate(ctx context.Context, name stri panic("an overlay cannot revalidate file objects from the lower fs") } - // Do we have anything to revalidate? - if child.overlay.upper == nil { - return false + var revalidate bool + child.overlay.copyMu.RLock() + if child.overlay.upper != nil { + // Does the upper require revalidation? + revalidate = o.upper.Revalidate(ctx, name, parent.overlay.upper, child.overlay.upper) + } else { + // Nothing to revalidate. + revalidate = false } - - // Does the upper require revalidation? - return o.upper.Revalidate(ctx, name, parent.overlay.upper, child.overlay.upper) + child.overlay.copyMu.RUnlock() + return revalidate } // Keep implements MountSourceOperations by delegating to the upper |