nilfs2: fix leak of nilfs_root in case of writer thread creation failure
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 v5.4.218 by commit b7e409d11db9ce9f8bc05fcdfa24d143f60cd393, it was introduced in version v2.6.37 by commit e912a5b66837ee89fb025e67b5efeaa11930c2ce. For more details please see the references link.