nilfs2: fix deadlock in nilfscountfree_blocks()
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 v4.14.300 by commit 8b4506cff6630bb474bb46a2a75c31e533a756ba, it was introduced in version v2.6.38 by commit e828949e5b42bfd234ee537cdb7c5e3a577958a3. For more details please see the references link.