[PATCH 00/43] Add KernelMemorySanitizer infrastructure · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 01/43] arch/x86: add missing include to sparsemem.h · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 02/43] stackdepot: reserve 5 extra bits in depot_stack_handle_t · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 03/43] kasan: common: adapt to the new prototype of __stack_depot_save() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 04/43] instrumented.h: allow instrumenting both sides of copy_from_user() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 05/43] asm: x86: instrument usercopy in get_user() and __put_user_size() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 06/43] asm-generic: instrument usercopy in cacheflush.h · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 07/43] compiler_attributes.h: add __disable_sanitizer_instrumentation · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 07/43] compiler_attributes.h: add __disable_sanitizer_instrumentation · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 07/43] compiler_attributes.h: add __disable_sanitizer_instrumentation · Marco Elver <elver@google.com> · 2021-12-15
[PATCH 09/43] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 09/43] kmsan: introduce __no_sanitize_memory and __no_kmsan_checks · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
[PATCH 08/43] kmsan: add ReST documentation · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 10/43] kmsan: pgtable: reduce vmalloc space · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 10/43] kmsan: pgtable: reduce vmalloc space · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 10/43] kmsan: pgtable: reduce vmalloc space · Alexander Potapenko <glider@google.com> · 2022-03-18
[PATCH 11/43] libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN · Marco Elver <elver@google.com> · 2021-12-15
Re: [PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 12/43] kcsan: clang: retire CONFIG_KCSAN_KCOV_BROKEN · Alexander Potapenko <glider@google.com> · 2022-03-18
[PATCH 16/43] kmsan: mm: call KMSAN hooks from SLUB code · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 16/43] kmsan: mm: call KMSAN hooks from SLUB code · Vlastimil Babka <hidden> · 2022-01-07
Re: [PATCH 16/43] kmsan: mm: call KMSAN hooks from SLUB code · Alexander Potapenko <glider@google.com> · 2022-03-25
[PATCH 15/43] kmsan: mm: maintain KMSAN metadata for page operations · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 14/43] MAINTAINERS: add entry for KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 13/43] kmsan: add KMSAN runtime core · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 13/43] kmsan: add KMSAN runtime core · Greg Kroah-Hartman <gregkh@linuxfoundation.org> · 2021-12-14
Re: [PATCH 13/43] kmsan: add KMSAN runtime core · Alexander Potapenko <glider@google.com> · 2021-12-16
Re: [PATCH 13/43] kmsan: add KMSAN runtime core · Greg Kroah-Hartman <gregkh@linuxfoundation.org> · 2021-12-17
Re: [PATCH 13/43] kmsan: add KMSAN runtime core · Alexander Potapenko <glider@google.com> · 2022-03-21
[PATCH 17/43] kmsan: handle task creation and exiting · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 18/43] kmsan: unpoison @tlb in arch_tlb_gather_mmu() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 20/43] instrumented.h: add KMSAN support · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 21/43] kmsan: mark noinstr as __no_sanitize_memory · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 21/43] kmsan: mark noinstr as __no_sanitize_memory · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
[PATCH 22/43] kmsan: initialize the output of READ_ONCE_NOCHECK() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 19/43] kmsan: init: call KMSAN initialization routines · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 23/43] kmsan: make READ_ONCE_TASK_STACK() return initialized values · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 24/43] kmsan: disable KMSAN instrumentation for certain kernel parts · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 24/43] kmsan: disable KMSAN instrumentation for certain kernel parts · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
[PATCH 25/43] kmsan: skip shadow checks in files doing context switches · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 25/43] kmsan: skip shadow checks in files doing context switches · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 25/43] kmsan: skip shadow checks in files doing context switches · Alexander Potapenko <glider@google.com> · 2021-12-15
Re: [PATCH 25/43] kmsan: skip shadow checks in files doing context switches · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
[PATCH 26/43] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 26/43] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() · "Michael S. Tsirkin" <mst@redhat.com> · 2022-01-06
[PATCH 27/43] x86: kmsan: add iomem support · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 28/43] kmsan: dma: unpoison DMA mappings · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 29/43] kmsan: handle memory sent to/from USB · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 31/43] kmsan: disable strscpy() optimization under KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 32/43] crypto: kmsan: disable accelerated configs under KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 33/43] kmsan: disable physical page merging in biovec · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 33/43] kmsan: disable physical page merging in biovec · Mark Rutland <mark.rutland@arm.com> · 2021-12-15
Re: [PATCH 33/43] kmsan: disable physical page merging in biovec · Alexander Potapenko <glider@google.com> · 2021-12-15
[PATCH 34/43] kmsan: block: skip bio block merging logic for KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 30/43] kmsan: add tests for KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 35/43] x86: kmsan: use __msan_ string functions where possible. · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 37/43] x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 36/43] x86: kmsan: sync metadata pages on page fault · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 38/43] x86: fs: kmsan: disable CONFIG_DCACHE_WORD_ACCESS · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 39/43] x86: kmsan: handle register passing from uninstrumented code · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 39/43] x86: kmsan: handle register passing from uninstrumented code · Thomas Gleixner <hidden> · 2021-12-17
Re: [PATCH 39/43] x86: kmsan: handle register passing from uninstrumented code · Alexander Potapenko <glider@google.com> · 2021-12-20
[PATCH 40/43] kmsan: kcov: unpoison area->list in kcov_remote_area_put() · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 41/43] security: kmsan: fix interoperability with auto-initialization · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 41/43] security: kmsan: fix interoperability with auto-initialization · Greg Kroah-Hartman <gregkh@linuxfoundation.org> · 2021-12-14
Re: [PATCH 41/43] security: kmsan: fix interoperability with auto-initialization · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 41/43] security: kmsan: fix interoperability with auto-initialization · Greg Kroah-Hartman <gregkh@linuxfoundation.org> · 2021-12-14
[PATCH 42/43] objtool: kmsan: list KMSAN API functions as uaccess-safe · Alexander Potapenko <glider@google.com> · 2021-12-14
[PATCH 43/43] x86: kmsan: enable KMSAN builds for x86 · Alexander Potapenko <glider@google.com> · 2021-12-14
Re: [PATCH 00/43] Add KernelMemorySanitizer infrastructure · Greg Kroah-Hartman <gregkh@linuxfoundation.org> · 2021-12-14
Re: [PATCH 00/43] Add KernelMemorySanitizer infrastructure · Alexander Potapenko <glider@google.com> · 2021-12-16

Re: [PATCH 41/43] security: kmsan: fix interoperability with auto-initialization

From: Alexander Potapenko <glider@google.com>
Date: 2021-12-14 17:01:22
Also in: linux-mm, lkml

On Tue, Dec 14, 2021 at 5:38 PM Greg Kroah-Hartman
[off-list ref] wrote:

quoted

@@ -124,6 +125,7 @@ choice
      config INIT_STACK_ALL_ZERO
              bool "zero-init everything (strongest and safest)"
              depends on CC_HAS_AUTO_VAR_INIT_ZERO
+             depends on !KMSAN

So this means KMSAN is a developer debugging feature only and should
never be turned on on a real device/server that has users?

100% correct. KMSAN is way slower than KASAN, it also eats 2/3 of your
memory to store the metadata.
I thought it was sort of self-evident, but I can surely mention this
explicitly in the cover letter.

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