CVE-2026-43348 mshv_vtl: Fix vmemmap_shift exceeding MAX_FOLIO_ORDER

In the Linux kernel, the following vulnerability has been resolved: mshvvtl: Fix vmemmapshift exceeding MAXFOLIOORDER When registering VTL0 memory via MSHVADDVTL0MEMORY, the kernel computes pgmap-vmemmapshift as the number of trailing zeros in the OR of startpfn and lastpfn, intending to use the...