Hi, here is a small patch-set to sync unmappings in the vmalloc/ioremap areas between page-tables in the system. This is only needed x86-32 with !SHARED_KERNEL_PMD, which is the case on a PAE kernel with PTI enabled. On affected systems the missing sync causes old mappings to persist in some page-tables, causing data corruption and other undefined behavior. Please review. Thanks, Joerg Changes v2 -> v3: - Moved the vmalloc_sync_all() call to the lazy vmap purge function as requested by Andy Lutomirski - Made sure that the code in vmalloc_sync_all() really iterates over all pgds (pointed out by Thomas Gleixner) - Added a couple of comments Changes v1 -> v2: - Added correct Fixes-tags to all patches Joerg Roedel (3): x86/mm: Check for pfn instead of page in vmalloc_sync_one() x86/mm: Sync also unmappings in vmalloc_sync_all() mm/vmalloc: Sync unmappings in vunmap_page_range() arch/x86/mm/fault.c | 15 ++++++--------- mm/vmalloc.c | 9 +++++++++ 2 files changed, 15 insertions(+), 9 deletions(-) -- 2.17.1
