overlayfs was leaking dentry on non-directories when using the
'default_permissions' mount option, which resulted in "BUG Dentry
still in use".
The following kernel commit fixed it:
ovl: fix dentry leak for default_permissions
Reviewed-by: Xiong Zhou <xzhou@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Eryu Guan