NFS: Don't corrupt the value of pgbyteswritten in nfsdorecoalesce()
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 v4.9.271 by commit b291baae24f876acd5a5dd57d0bb2bbac8a68b0c, it was introduced in version v4.0 by commit a7d42ddb3099727f58366fa006f850a219cce6c8. For more details please see the references link.