CVE-2025-21724 iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()

In the Linux kernel, the following vulnerability has been resolved: iommufd/iovabitmap: Fix shift-out-of-bounds in iovabitmapoffsettoindex Resolve a UBSAN shift-out-of-bounds issue in iovabitmapoffsettoindex where shifting the constant "1" of type int by bitmap-mapped.pgshift an unsigned long val...