CVE-2022-49778 arm64/mm: fix incorrect file_map_count for non-leaf pmd/pud

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for non-leaf pmd/pud The page table check trigger BUGON unexpectedly when collapse hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:82! Internal error: Oops - BUG...

PT-2023-33229 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to v5.15.83 Description: The issue concerns a problem with taking the right locks for page table retraction in mm/khugepaged. The actual impact and attack plausibility have not yet been proven. Recommendations: For...