CVE-2026-31463 iomap: fix invalid folio access when i_blkbits differs from I/O granularity

In the Linux kernel, the following vulnerability has been resolved: iomap: fix invalid folio access when iblkbits differs from I/O granularity Commit aa35dd5cbc06 "iomap: fix invalid folio access after folioendread" partially addressed invalid folio access for folios without an ifs attached, but ...