Re: [PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38

[PATCH v3 00/37] Shadow stacks for userspace · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 01/37] Documentation/x86: Add CET description · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 02/37] x86/cet/shstk: Add Kconfig option for Shadow Stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 03/37] x86/cpufeatures: Add CPU feature flags for shadow stacks · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 03/37] x86/cpufeatures: Add CPU feature flags for shadow stacks · Borislav Petkov <bp@alien8.de> · 2022-11-07
[PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Borislav Petkov <bp@alien8.de> · 2022-11-07
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-07
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Borislav Petkov <bp@alien8.de> · 2022-11-07
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-07
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · Borislav Petkov <bp@alien8.de> · 2022-11-07
Re: [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-07
[PATCH v3 05/37] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 06/37] x86/fpu: Add helper for modifying xstate · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 09/37] x86/mm: Move pmd_write(), pud_write() up in the file · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 08/37] x86/mm: Remove _PAGE_DIRTY from kernel RO pages · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 07/37] x86/cet: Add user control-protection fault handler · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 10/37] x86/mm: Introduce _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 11/37] x86/mm: Update pte_modify for _PAGE_COW · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 12/37] 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> · 2022-11-04
[PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 14/37] mm: Introduce VM_SHADOW_STACK for shadow stack memory · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors · Peter Zijlstra <peterz@infradead.org> · 2022-11-16
[PATCH v3 16/37] x86/mm: Update maybe_mkwrite() for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 17/37] mm: Fixup places that call pte_mkwrite() directly · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 18/37] mm: Add guard pages around a shadow stack. · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 18/37] mm: Add guard pages around a shadow stack. · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 18/37] mm: Add guard pages around a shadow stack. · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 18/37] mm: Add guard pages around a shadow stack. · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 18/37] mm: Add guard pages around a shadow stack. · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 19/37] mm/mmap: Add shadow stack pages to memory accounting · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 20/37] mm/mprotect: Exclude shadow stack from preserve_write · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 20/37] mm/mprotect: Exclude shadow stack from preserve_write · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 20/37] mm/mprotect: Exclude shadow stack from preserve_write · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 21/37] mm: Re-introduce vm_flags to do_mmap() · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 22/37] mm: Don't allow write GUPs to shadow stack memory · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 23/37] mm: Warn on shadow stack memory in wrong vma · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 24/37] x86: Introduce userspace API for CET enabling · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 24/37] x86: Introduce userspace API for CET enabling · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 24/37] x86: Introduce userspace API for CET enabling · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 24/37] x86: Introduce userspace API for CET enabling · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 24/37] x86: Introduce userspace API for CET enabling · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 24/37] x86: Introduce userspace API for CET enabling · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 25/37] x86/shstk: Add user-mode shadow stack support · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 25/37] x86/shstk: Add user-mode shadow stack support · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 25/37] x86/shstk: Add user-mode shadow stack support · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 26/37] x86/shstk: Handle thread shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · Peter Zijlstra <peterz@infradead.org> · 2022-11-16
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-16
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · Peter Zijlstra <peterz@infradead.org> · 2022-11-17
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-18
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
[PATCH v3 28/37] x86/shstk: Handle signals for shadow stack · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 29/37] x86/shstk: Introduce map_shadow_stack syscall · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 30/37] x86/shstk: Support wrss for userspace · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 31/37] x86: Expose thread features in /proc/$PID/status · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 32/37] x86/cet/shstk: Wire in CET interface · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 34/37] x86/fpu: Add helper for initing features · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 33/37] selftests/x86: Add shadow stack test · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
[PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
RE: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Schimpe, Christina <hidden> · 2022-11-17
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Peter Zijlstra <peterz@infradead.org> · 2022-11-17
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-18
RE: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Schimpe, Christina <hidden> · 2022-11-18
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-17
RE: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Schimpe, Christina <hidden> · 2022-11-18
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-18
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Mike Rapoport <rppt@kernel.org> · 2022-11-21
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-21
Re: [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET · Mike Rapoport <rppt@kernel.org> · 2022-11-22
[PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-15
Re: [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
Re: [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · Dave Hansen <hidden> · 2022-11-15
Re: [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK · Peter Zijlstra <peterz@infradead.org> · 2022-11-15
[RFC 37/37] fs/binfmt_elf: Block old shstk elf bit · Rick Edgecombe <rick.p.edgecombe@intel.com> · 2022-11-04
Re: [RFC 37/37] fs/binfmt_elf: Block old shstk elf bit · H.J. Lu <hidden> · 2022-11-04
Re: [RFC 37/37] fs/binfmt_elf: Block old shstk elf bit · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2022-11-07

From: Peter Zijlstra <peterz@infradead.org>
Date: 2022-11-15 11:21:16
Also in: linux-arch, linux-doc, linux-mm, lkml

On Fri, Nov 04, 2022 at 03:35:40PM -0700, Rick Edgecombe wrote:

From: Yu-cheng Yu <redacted>

To introduce VM_SHADOW_STACK as VM_HIGH_ARCH_BIT (37), and make all
VM_HIGH_ARCH_BITs stay together, move VM_UFFD_MINOR_BIT from 37 to 38.

Why thought ?!? Changelog utterly fails to provide rationale.

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