fs: jfs: fix possible NULL pointer dereference in dbFree()
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 v4.14.283 by commit 070ddf59cf17faf6aae7d89f78e0510c94d07940. For more details please see the references link.