kernel: mm/shmem: disable PMD-sized page cache if needed

A denial of service vulnerability was found in the Linux Kernel. In architectures such as ARM64 where the base page size is 64KB, a 512MB page cache could lead to a software crash...

SUSE CVE-2024-41031

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: skip to create PMD-sized page cache if needed On ARM64, HPAGEPMDORDER is 13 when the base page size is 64KB. The PMD-sized page cache can't be supported by xarray as the following error messages indicate. ------------...