In the Linux kernel, the following vulnerability has been resolved:

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

Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()
where shifting the constant "1" (of type int) by bitmap->mapped.pgshift
(an unsigned long value) could result in undefined behavior.

The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds
31 (e.g., pgshift = 63) the shift operation overflows, as the result
cannot be represented in a 32-bit type.

To resolve this, the constant is updated to "1UL", promoting it to an
unsigned long type to match the operand's type.

https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9

https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3

https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6

https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe

https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c