cifs: Fix xid leak in cifscopyfile_range()
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 v5.15.76 by commit 27cfd3afaab000a455194338db3b7f2031fde9d0, it was introduced in version v5.7 by commit 4e8aea30f7751ce7c4b158aa0c04e7744d281cc3. For more details please see the references link.