nilfs2: fix use-after-free bug of ns_writer on remount
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.225 by commit 9b162e81045266a2d5b44df9dffdf05c54de9cca. For more details please see the references link.