CVE-2026-64065 netfs: fix VM_BUG_ON_FOLIO() issue in netfs_write_begin() call

In the Linux kernel, the following vulnerability has been resolved: netfs: fix VMBUGONFOLIO issue in netfswritebegin call The multiple runs of generic/013 test-case is capable to reproduce a kernel BUG at mm/filemap.c:1504 with probability of 30%. while true; do sudo ./check generic/013 done...