Messages in this thread | | | From | Joerg Roedel <> | Subject | [PATCH 0/3] Sync unmappings in vmalloc/ioremap areas | Date | Mon, 15 Jul 2019 13:02:09 +0200 |
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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
Joerg Roedel (3): x86/mm: Check for pfn instead of page in vmalloc_sync_one() x86/mm: Sync also unmappings in vmalloc_sync_one() mm/vmalloc: Sync unmappings in vunmap_page_range()
arch/x86/mm/fault.c | 9 +++++---- mm/vmalloc.c | 2 ++ 2 files changed, 7 insertions(+), 4 deletions(-)
-- 2.17.1
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