From: andrey.konovalov@linux.dev
To: Marco Elver <elver@google.com>,
Alexander Potapenko <glider@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org,
Peter Collingbourne <pcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH mm v3 00/38] kasan, vmalloc, arm64: add vmalloc tagging support for SW/HW_TAGS
Date: Mon, 13 Dec 2021 22:51:19 +0100 [thread overview]
Message-ID: <cover.1639432170.git.andreyknvl@google.com> (raw)
From: Andrey Konovalov <andreyknvl@google.com>
Hi,
This patchset adds vmalloc tagging support for SW_TAGS and HW_TAGS
KASAN modes.
The tree with patches is available here:
https://github.com/xairy/linux/tree/up-kasan-vmalloc-tags-v3-akpm
About half of patches are cleanups I went for along the way. None of
them seem to be important enough to go through stable, so I decided
not to split them out into separate patches/series.
The patchset is partially based on an early version of the HW_TAGS
patchset by Vincenzo that had vmalloc support. Thus, I added a
Co-developed-by tag into a few patches.
SW_TAGS vmalloc tagging support is straightforward. It reuses all of
the generic KASAN machinery, but uses shadow memory to store tags
instead of magic values. Naturally, vmalloc tagging requires adding
a few kasan_reset_tag() annotations to the vmalloc code.
HW_TAGS vmalloc tagging support stands out. HW_TAGS KASAN is based on
Arm MTE, which can only assigns tags to physical memory. As a result,
HW_TAGS KASAN only tags vmalloc() allocations, which are backed by
page_alloc memory. It ignores vmap() and others.
Changes in v2->v3:
- Rebase onto mm.
- New patch: "kasan, arm64: reset pointer tags of vmapped stacks".
- New patch: "kasan, vmalloc: don't tag executable vmalloc allocations".
- New patch: "kasan, arm64: don't tag executable vmalloc allocations".
- Allowing enabling KASAN_VMALLOC with SW/HW_TAGS is moved to
"kasan: allow enabling KASAN_VMALLOC and SW/HW_TAGS", as this can only
be done once executable allocations are no longer tagged.
- Minor fixes, see patches for lists of changes.
Changes in v1->v2:
- Move memory init for vmalloc() into vmalloc code for HW_TAGS KASAN.
- Minor fixes and code reshuffling, see patches for lists of changes.
Thanks!
Andrey Konovalov (38):
kasan, page_alloc: deduplicate should_skip_kasan_poison
kasan, page_alloc: move tag_clear_highpage out of
kernel_init_free_pages
kasan, page_alloc: merge kasan_free_pages into free_pages_prepare
kasan, page_alloc: simplify kasan_poison_pages call site
kasan, page_alloc: init memory of skipped pages on free
kasan: drop skip_kasan_poison variable in free_pages_prepare
mm: clarify __GFP_ZEROTAGS comment
kasan: only apply __GFP_ZEROTAGS when memory is zeroed
kasan, page_alloc: refactor init checks in post_alloc_hook
kasan, page_alloc: merge kasan_alloc_pages into post_alloc_hook
kasan, page_alloc: combine tag_clear_highpage calls in post_alloc_hook
kasan, page_alloc: move SetPageSkipKASanPoison in post_alloc_hook
kasan, page_alloc: move kernel_init_free_pages in post_alloc_hook
kasan, page_alloc: simplify kasan_unpoison_pages call site
kasan: clean up metadata byte definitions
kasan: define KASAN_VMALLOC_INVALID for SW_TAGS
kasan, x86, arm64, s390: rename functions for modules shadow
kasan, vmalloc: drop outdated VM_KASAN comment
kasan: reorder vmalloc hooks
kasan: add wrappers for vmalloc hooks
kasan, vmalloc: reset tags in vmalloc functions
kasan, fork: reset pointer tags of vmapped stacks
kasan, arm64: reset pointer tags of vmapped stacks
kasan, vmalloc: add vmalloc tagging for SW_TAGS
kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged
kasan, vmalloc: don't unpoison VM_ALLOC pages before mapping
kasan, page_alloc: allow skipping unpoisoning for HW_TAGS
kasan, page_alloc: allow skipping memory init for HW_TAGS
kasan, vmalloc: add vmalloc tagging for HW_TAGS
kasan, vmalloc: don't tag executable vmalloc allocations
kasan, arm64: don't tag executable vmalloc allocations
kasan: mark kasan_arg_stacktrace as __initdata
kasan: simplify kasan_init_hw_tags
kasan: add kasan.vmalloc command line flag
kasan: allow enabling KASAN_VMALLOC and SW/HW_TAGS
arm64: select KASAN_VMALLOC for SW/HW_TAGS modes
kasan: documentation updates
kasan: improve vmalloc tests
Documentation/dev-tools/kasan.rst | 17 ++-
arch/arm64/Kconfig | 2 +-
arch/arm64/include/asm/vmalloc.h | 10 ++
arch/arm64/include/asm/vmap_stack.h | 5 +-
arch/arm64/kernel/module.c | 5 +-
arch/arm64/net/bpf_jit_comp.c | 3 +-
arch/s390/kernel/module.c | 2 +-
arch/x86/kernel/module.c | 2 +-
include/linux/gfp.h | 28 +++--
include/linux/kasan.h | 97 +++++++++------
include/linux/vmalloc.h | 18 ++-
kernel/fork.c | 1 +
kernel/scs.c | 4 +-
lib/Kconfig.kasan | 20 +--
lib/test_kasan.c | 181 +++++++++++++++++++++++++++-
mm/kasan/common.c | 4 +-
mm/kasan/hw_tags.c | 166 ++++++++++++++++++++-----
mm/kasan/kasan.h | 16 ++-
mm/kasan/shadow.c | 63 ++++++----
mm/page_alloc.c | 150 +++++++++++++++--------
mm/vmalloc.c | 78 ++++++++++--
21 files changed, 668 insertions(+), 204 deletions(-)
--
2.25.1
next reply other threads:[~2021-12-13 21:52 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 21:51 andrey.konovalov [this message]
2021-12-13 21:51 ` [PATCH mm v3 01/38] kasan, page_alloc: deduplicate should_skip_kasan_poison andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 02/38] kasan, page_alloc: move tag_clear_highpage out of kernel_init_free_pages andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 03/38] kasan, page_alloc: merge kasan_free_pages into free_pages_prepare andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 04/38] kasan, page_alloc: simplify kasan_poison_pages call site andrey.konovalov
2021-12-16 12:54 ` Alexander Potapenko
2021-12-13 21:51 ` [PATCH mm v3 05/38] kasan, page_alloc: init memory of skipped pages on free andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 06/38] kasan: drop skip_kasan_poison variable in free_pages_prepare andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 07/38] mm: clarify __GFP_ZEROTAGS comment andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 08/38] kasan: only apply __GFP_ZEROTAGS when memory is zeroed andrey.konovalov
2021-12-13 21:51 ` [PATCH mm v3 09/38] kasan, page_alloc: refactor init checks in post_alloc_hook andrey.konovalov
2021-12-16 13:32 ` Alexander Potapenko
2021-12-13 21:51 ` [PATCH mm v3 10/38] kasan, page_alloc: merge kasan_alloc_pages into post_alloc_hook andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 11/38] kasan, page_alloc: combine tag_clear_highpage calls in post_alloc_hook andrey.konovalov
2021-12-16 13:04 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 12/38] kasan, page_alloc: move SetPageSkipKASanPoison " andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 13/38] kasan, page_alloc: move kernel_init_free_pages " andrey.konovalov
2021-12-16 11:00 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 14/38] kasan, page_alloc: simplify kasan_unpoison_pages call site andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 15/38] kasan: clean up metadata byte definitions andrey.konovalov
2021-12-16 10:52 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 16/38] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 17/38] kasan, x86, arm64, s390: rename functions for modules shadow andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 18/38] kasan, vmalloc: drop outdated VM_KASAN comment andrey.konovalov
2021-12-16 10:53 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 19/38] kasan: reorder vmalloc hooks andrey.konovalov
2021-12-16 10:55 ` Alexander Potapenko
2021-12-13 21:53 ` [PATCH mm v3 20/38] kasan: add wrappers for " andrey.konovalov
2021-12-13 21:53 ` [PATCH mm v3 21/38] kasan, vmalloc: reset tags in vmalloc functions andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 22/38] kasan, fork: reset pointer tags of vmapped stacks andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 23/38] kasan, arm64: " andrey.konovalov
2021-12-13 21:59 ` Andrey Konovalov
2021-12-14 13:25 ` Catalin Marinas
2021-12-13 21:54 ` [PATCH mm v3 24/38] kasan, vmalloc: add vmalloc tagging for SW_TAGS andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 25/38] kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged andrey.konovalov
2021-12-14 17:11 ` Catalin Marinas
2021-12-14 18:27 ` Andrey Konovalov
2021-12-14 19:27 ` Catalin Marinas
2021-12-20 21:38 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 26/38] kasan, vmalloc: don't unpoison VM_ALLOC pages before mapping andrey.konovalov
2021-12-16 19:07 ` Alexander Potapenko
2021-12-20 21:35 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 27/38] kasan, page_alloc: allow skipping unpoisoning for HW_TAGS andrey.konovalov
2021-12-13 21:54 ` [PATCH mm v3 28/38] kasan, page_alloc: allow skipping memory init " andrey.konovalov
2021-12-14 18:00 ` Marco Elver
2021-12-14 18:28 ` Andrey Konovalov
2021-12-17 1:50 ` Kuan-Ying Lee
2021-12-20 21:35 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 29/38] kasan, vmalloc: add vmalloc tagging " andrey.konovalov
2021-12-14 19:55 ` Marco Elver
2021-12-14 22:08 ` Andrey Konovalov
2021-12-14 21:03 ` Marco Elver
2021-12-13 21:54 ` [PATCH mm v3 30/38] kasan, vmalloc: don't tag executable vmalloc allocations andrey.konovalov
2021-12-14 19:42 ` Andrey Konovalov
2021-12-13 21:54 ` [PATCH mm v3 31/38] kasan, arm64: " andrey.konovalov
2021-12-13 21:59 ` Andrey Konovalov
2021-12-17 13:45 ` Catalin Marinas
2021-12-13 21:54 ` [PATCH mm v3 32/38] kasan: mark kasan_arg_stacktrace as __initdata andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 33/38] kasan: simplify kasan_init_hw_tags andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 34/38] kasan: add kasan.vmalloc command line flag andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 35/38] kasan: allow enabling KASAN_VMALLOC and SW/HW_TAGS andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 36/38] arm64: select KASAN_VMALLOC for SW/HW_TAGS modes andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 37/38] kasan: documentation updates andrey.konovalov
2021-12-13 21:55 ` [PATCH mm v3 38/38] kasan: improve vmalloc tests andrey.konovalov
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