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Commits on Aug 2, 2023

• x86/cpufeatures: Enable CET CR4 bit for shadow stack

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• x86/shstk: Wire in shadow stack interface

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• x86: Expose thread features in /proc/$PID/status

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• x86/shstk: Support WRSS for userspace

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• x86/shstk: Introduce map_shadow_stack syscall

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• x86/shstk: Check that signal frame is shadow stack mem

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• x86/shstk: Check that SSP is aligned on sigreturn

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• x86/shstk: Handle signals for shadow stack

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• x86/shstk: Introduce routines modifying shstk

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• x86/shstk: Handle thread shadow stack

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• x86/shstk: Add user-mode shadow stack support

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• x86/shstk: Add user control-protection fault handler

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• x86: Introduce userspace API for shadow stack

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• x86/fpu: Add helper for modifying xstate

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• x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states

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• Documentation/x86: Add CET shadow stack description

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• mm: Don't allow write GUPs to shadow stack memory

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Commits on Jul 11, 2023

• x86/mm: Teach pte_mkwrite() about stack memory

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• x86/mm: Introduce MAP_ABOVE4G

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• mm/mmap: Add shadow stack pages to memory accounting

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• x86/mm: Warn if create Write=0,Dirty=1 with raw prot

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• mm: Warn on shadow stack memory in wrong vma

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• mm: Add guard pages around a shadow stack.

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• x86/mm: Check shadow stack page fault errors

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• x86/mm: Remove _PAGE_DIRTY from kernel RO pages

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• x86/mm: Start actually marking _PAGE_SAVED_DIRTY

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• x86/mm: Update ptep/pmdp_set_wrprotect() for _PAGE_SAVED_DIRTY

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• x86/mm: Introduce _PAGE_SAVED_DIRTY

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• x86/mm: Move pmd_write(), pud_write() up in the file

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• x86/cpufeatures: Add CPU feature flags for shadow stacks

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• x86/traps: Move control protection handler to separate file

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• x86/shstk: Add Kconfig option for shadow stack

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• mm: Make pte_mkwrite() take a VMA

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• mm: Move pte/pmd_mkwrite() callers with no VMA to _novma()

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• mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma()

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