diff options
Diffstat (limited to 'pkg/sentry/fs/tmpfs/tmpfs.go')
| -rw-r--r-- | pkg/sentry/fs/tmpfs/tmpfs.go | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/pkg/sentry/fs/tmpfs/tmpfs.go b/pkg/sentry/fs/tmpfs/tmpfs.go index 3c2b583ae..b095312fe 100644 --- a/pkg/sentry/fs/tmpfs/tmpfs.go +++ b/pkg/sentry/fs/tmpfs/tmpfs.go @@ -39,14 +39,13 @@ var fsInfo = fs.Info{ // rename implements fs.InodeOperations.Rename for tmpfs nodes. func rename(ctx context.Context, oldParent *fs.Inode, oldName string, newParent *fs.Inode, newName string, replacement bool) error { - op, ok := oldParent.InodeOperations.(*Dir) - if !ok { - return syserror.EXDEV - } - np, ok := newParent.InodeOperations.(*Dir) - if !ok { + // Don't allow renames across different mounts. + if newParent.MountSource != oldParent.MountSource { return syserror.EXDEV } + + op := oldParent.InodeOperations.(*Dir) + np := newParent.InodeOperations.(*Dir) return ramfs.Rename(ctx, op.ramfsDir, oldName, np.ramfsDir, newName, replacement) } |