CVE-2026-45999 erofs: fix unsigned underflow in z_erofs_lz4_handle_overlap()

In the Linux kernel, the following vulnerability has been resolved: erofs: fix unsigned underflow in zerofslz4handleoverlap Some crafted images can have illegal !partialdecoding && mllen out access reads past the decompressedpages array. However, such crafted cases can correctly result in a...