[PATCHv3 0/3] Fix couple of issues with LDT remap for PTI

Kirill A. Shutemov
2018-10-26T12:29:04Z

The patchset fixes issues with LDT remap for PTI:

- Layout collision due to KASLR with 5-level paging;

- Information leak via Meltdown-like attack;

Please review and consider applying.

v3:
- Split out cleanup in map_ldt_struct() into a separate patch
v2:
- Rebase to the Linus' tree
+ fix conflict with new documentation of kernel memory layout
+ fix few mistakes in layout documentation
- Fix typo in commit message

Kirill A. Shutemov (3):
x86/mm: Move LDT remap out of KASLR region on 5-level paging
x86/ldt: Unmap PTEs for the slot before freeing LDT pages
x86/ldt: Remove unused variable in map_ldt_struct()

Documentation/x86/x86_64/mm.txt | 34 +++++++-------
arch/x86/include/asm/page_64_types.h | 12 ++---
arch/x86/include/asm/pgtable_64_types.h | 4 +-
arch/x86/kernel/ldt.c | 59 ++++++++++++++++---------
arch/x86/xen/mmu_pv.c | 6 +--
5 files changed, 67 insertions(+), 48 deletions(-)

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2.19.1