CVE-2025-21724

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()<br /> <br /> Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()<br /> where shifting the constant "1" (of type int) by bitmap-&gt;mapped.pgshift<br /> (an unsigned long value) could result in undefined behavior.<br /> <br /> The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds<br /> 31 (e.g., pgshift = 63) the shift operation overflows, as the result<br /> cannot be represented in a 32-bit type.<br /> <br /> To resolve this, the constant is updated to "1UL", promoting it to an<br /> unsigned long type to match the operand&amp;#39;s type.