diff options
| -rw-r--r-- | pkg/sentry/vfs/mount.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/sentry/vfs/mount.go b/pkg/sentry/vfs/mount.go index d865fd603..7063066ff 100644 --- a/pkg/sentry/vfs/mount.go +++ b/pkg/sentry/vfs/mount.go @@ -309,6 +309,11 @@ func (vfs *VirtualFilesystem) UmountAt(ctx context.Context, creds *auth.Credenti vfs.mountMu.Unlock() return syserror.EINVAL } + + if vd.mount == vd.mount.ns.root { + vfs.mountMu.Unlock() + return syserror.EINVAL + } } // TODO(gvisor.dev/issue/1035): Linux special-cases umount of the caller's |