Re: [PATCH v4 20/39] mm/mmap: Add shadow stack pages to memory accounting

[PATCH v4 00/39] Shadow stacks for userspace · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 01/39] Documentation/x86: Add CET shadow stack description · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 01/39] Documentation/x86: Add CET shadow stack description · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 01/39] Documentation/x86: Add CET shadow stack description · Bagas Sanjaya <hidden> · 2022-12-03
Re: [PATCH v4 01/39] Documentation/x86: Add CET shadow stack description · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-05
[PATCH v4 02/39] x86/shstk: Add Kconfig option for Shadow Stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 02/39] x86/shstk: Add Kconfig option for Shadow Stack · Kees Cook <hidden> · 2022-12-03
[PATCH v4 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks · Borislav Petkov <bp@alien8.de> · 2022-12-07
Re: [PATCH v4 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-07
Re: [PATCH v4 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks · Borislav Petkov <bp@alien8.de> · 2022-12-08
[PATCH v4 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Borislav Petkov <bp@alien8.de> · 2022-12-07
Re: [PATCH v4 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-07
[PATCH v4 05/39] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 05/39] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 05/39] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states · Borislav Petkov <bp@alien8.de> · 2022-12-20
Re: [PATCH v4 05/39] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
[PATCH v4 06/39] x86/fpu: Add helper for modifying xstate · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate · Borislav Petkov <bp@alien8.de> · 2022-12-20
Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate · Borislav Petkov <bp@alien8.de> · 2022-12-21
[PATCH v4 07/39] x86: Add user control-protection fault handler · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · Borislav Petkov <bp@alien8.de> · 2022-12-20
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · Borislav Petkov <bp@alien8.de> · 2022-12-21
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · Borislav Petkov <bp@alien8.de> · 2023-01-04
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · Borislav Petkov <bp@alien8.de> · 2022-12-20
Re: [PATCH v4 07/39] x86: Add user control-protection fault handler · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
[PATCH v4 08/39] x86/mm: Remove _PAGE_DIRTY from kernel RO pages · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 08/39] x86/mm: Remove _PAGE_DIRTY from kernel RO pages · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 08/39] x86/mm: Remove _PAGE_DIRTY from kernel RO pages · Borislav Petkov <bp@alien8.de> · 2022-12-20
[PATCH v4 09/39] x86/mm: Move pmd_write(), pud_write() up in the file · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 10/39] x86/mm: Introduce _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 10/39] x86/mm: Introduce _PAGE_COW · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 10/39] x86/mm: Introduce _PAGE_COW · Borislav Petkov <bp@alien8.de> · 2022-12-20
Re: [PATCH v4 10/39] x86/mm: Introduce _PAGE_COW · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-21
[PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · Borislav Petkov <bp@alien8.de> · 2022-12-27
Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-27
Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · Borislav Petkov <bp@alien8.de> · 2023-01-04
Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2023-01-05
[PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW · Borislav Petkov <bp@alien8.de> · 2022-12-27
Re: [PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-27
Re: [PATCH v4 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW · Borislav Petkov <bp@alien8.de> · 2023-01-04
[PATCH v4 13/39] x86/mm: Start actually marking _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 13/39] x86/mm: Start actually marking _PAGE_COW · Kees Cook <hidden> · 2022-12-03
[PATCH v4 14/39] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 15/39] mm: Introduce VM_SHADOW_STACK for shadow stack memory · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 15/39] mm: Introduce VM_SHADOW_STACK for shadow stack memory · Kees Cook <hidden> · 2022-12-03
[PATCH v4 16/39] x86/mm: Check Shadow Stack page fault errors · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 16/39] x86/mm: Check Shadow Stack page fault errors · Borislav Petkov <bp@alien8.de> · 2023-01-04
Re: [PATCH v4 16/39] x86/mm: Check Shadow Stack page fault errors · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2023-01-05
[PATCH v4 17/39] x86/mm: Update maybe_mkwrite() for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 17/39] x86/mm: Update maybe_mkwrite() for shadow stack · Kees Cook <hidden> · 2022-12-03
[PATCH v4 18/39] mm: Fixup places that call pte_mkwrite() directly · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 18/39] mm: Fixup places that call pte_mkwrite() directly · Kees Cook <hidden> · 2022-12-03
[PATCH v4 20/39] mm/mmap: Add shadow stack pages to memory accounting · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 20/39] mm/mmap: Add shadow stack pages to memory accounting · Kees Cook <hidden> · 2022-12-03
[PATCH v4 21/39] mm/mprotect: Exclude shadow stack from preserve_write · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 21/39] mm/mprotect: Exclude shadow stack from preserve_write · Kees Cook <hidden> · 2022-12-03
[PATCH v4 19/39] mm: Add guard pages around a shadow stack. · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 22/39] mm: Re-introduce vm_flags to do_mmap() · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 23/39] mm: Don't allow write GUPs to shadow stack memory · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 23/39] mm: Don't allow write GUPs to shadow stack memory · Kees Cook <hidden> · 2022-12-03
[PATCH v4 24/39] mm: Warn on shadow stack memory in wrong vma · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 24/39] mm: Warn on shadow stack memory in wrong vma · Kees Cook <hidden> · 2022-12-03
[PATCH v4 25/39] x86: Introduce userspace API for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 25/39] x86: Introduce userspace API for shadow stack · Kees Cook <hidden> · 2022-12-03
[PATCH v4 26/39] x86/shstk: Add user-mode shadow stack support · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 26/39] x86/shstk: Add user-mode shadow stack support · Kees Cook <hidden> · 2022-12-03
[PATCH v4 27/39] x86/shstk: Handle thread shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 27/39] x86/shstk: Handle thread shadow stack · Kees Cook <hidden> · 2022-12-03
[PATCH v4 28/39] x86/shstk: Introduce routines modifying shstk · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 28/39] x86/shstk: Introduce routines modifying shstk · Kees Cook <hidden> · 2022-12-03
[PATCH v4 29/39] x86/shstk: Handle signals for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 29/39] x86/shstk: Handle signals for shadow stack · Kees Cook <hidden> · 2022-12-03
[PATCH v4 30/39] x86/shstk: Introduce map_shadow_stack syscall · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 30/39] x86/shstk: Introduce map_shadow_stack syscall · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 30/39] x86/shstk: Introduce map_shadow_stack syscall · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-05
[PATCH v4 31/39] x86/shstk: Support wrss for userspace · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 31/39] x86/shstk: Support wrss for userspace · Kees Cook <hidden> · 2022-12-03
[PATCH v4 33/39] x86: Prevent 32 bit operations for 64 bit shstk tasks · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 33/39] x86: Prevent 32 bit operations for 64 bit shstk tasks · Andy Lutomirski <luto@kernel.org> · 2022-12-03
Re: [PATCH v4 33/39] x86: Prevent 32 bit operations for 64 bit shstk tasks · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-04
Re: [PATCH v4 33/39] x86: Prevent 32 bit operations for 64 bit shstk tasks · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-15
[PATCH v4 32/39] x86: Expose thread features in /proc/$PID/status · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 32/39] x86: Expose thread features in /proc/$PID/status · Kees Cook <hidden> · 2022-12-03
[PATCH v4 34/39] x86/shstk: Wire in shadow stack interface · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 36/39] x86/fpu: Add helper for initing features · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 35/39] selftests/x86: Add shadow stack test · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
[PATCH v4 38/39] x86/shstk: Add ARCH_SHSTK_UNLOCK · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 38/39] x86/shstk: Add ARCH_SHSTK_UNLOCK · Kees Cook <hidden> · 2022-12-03
[PATCH v4 37/39] x86: Add PTRACE interface for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 37/39] x86: Add PTRACE interface for shadow stack · Kees Cook <hidden> · 2022-12-03
Re: [PATCH v4 37/39] x86: Add PTRACE interface for shadow stack · Mike Rapoport <rppt@kernel.org> · 2022-12-09
Re: [PATCH v4 37/39] x86: Add PTRACE interface for shadow stack · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-12-09
[PATCH v4 39/39] x86/shstk: Add ARCH_SHSTK_STATUS · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-12-03
Re: [PATCH v4 39/39] x86/shstk: Add ARCH_SHSTK_STATUS · Kees Cook <hidden> · 2022-12-03

From: Kees Cook <hidden>
Date: 2022-12-03 02:38:08
Also in: linux-api, linux-arch, linux-mm, lkml

On Fri, Dec 02, 2022 at 04:35:47PM -0800, Rick Edgecombe wrote:

From: Yu-cheng Yu <redacted>

The x86 Control-flow Enforcement Technology (CET) feature includes a new
type of memory called shadow stack. This shadow stack memory has some
unusual properties, which requires some core mm changes to function
properly.

Account shadow stack pages to stack memory.

Tested-by: Pengfei Xu <redacted>
Tested-by: John Allen <john.allen@amd.com>
Signed-off-by: Yu-cheng Yu <redacted>

Reviewed-by: Kees Cook <redacted>

-- 
Kees Cook

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help