From: elver@google.com
To: Andrey Konovalov <andreyknvl@google.com>
Cc: linux-arm-kernel@lists.infradead.org,
Branislav Rankov <Branislav.Rankov@arm.com>,
Elena Petrova <lenaptr@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
linux-mm@kvack.org, Alexander Potapenko <glider@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH v3 33/39] kasan, x86, s390: update undef CONFIG_KASAN
Date: Thu, 1 Oct 2020 19:59:19 +0200 [thread overview]
Message-ID: <20201001175919.GT4162920@elver.google.com> (raw)
In-Reply-To: <78ebf3bed0458172fec9e1e32f2d29d7c8c37341.1600987622.git.andreyknvl@google.com>
On Fri, Sep 25, 2020 at 12:50AM +0200, Andrey Konovalov wrote:
> With the intoduction of hardware tag-based KASAN some kernel checks of
> this kind:
>
> ifdef CONFIG_KASAN
>
> will be updated to:
>
> if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
>
> x86 and s390 use a trick to #undef CONFIG_KASAN for some of the code
> that isn't linked with KASAN runtime and shouldn't have any KASAN
> annotations.
>
> Also #undef CONFIG_KASAN_GENERIC with CONFIG_KASAN.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.com>
> ---
> Change-Id: I2a622db0cb86a8feb60c30d8cb09190075be2a90
> ---
> arch/s390/boot/string.c | 1 +
> arch/x86/boot/compressed/misc.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/arch/s390/boot/string.c b/arch/s390/boot/string.c
> index b11e8108773a..faccb33b462c 100644
> --- a/arch/s390/boot/string.c
> +++ b/arch/s390/boot/string.c
> @@ -3,6 +3,7 @@
> #include <linux/kernel.h>
> #include <linux/errno.h>
> #undef CONFIG_KASAN
> +#undef CONFIG_KASAN_GENERIC
> #include "../lib/string.c"
>
> int strncmp(const char *cs, const char *ct, size_t count)
> diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
> index 726e264410ff..2ac973983a8e 100644
> --- a/arch/x86/boot/compressed/misc.h
> +++ b/arch/x86/boot/compressed/misc.h
> @@ -12,6 +12,7 @@
> #undef CONFIG_PARAVIRT_XXL
> #undef CONFIG_PARAVIRT_SPINLOCKS
> #undef CONFIG_KASAN
> +#undef CONFIG_KASAN_GENERIC
>
> /* cpu_feature_enabled() cannot be used this early */
> #define USE_EARLY_PGTABLE_L5
> --
> 2.28.0.681.g6f77f65b4e-goog
>
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next prev parent reply other threads:[~2020-10-01 18:00 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 22:50 [PATCH v3 00/39] kasan: add hardware tag-based mode for arm64 Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 01/39] kasan: drop unnecessary GPL text from comment headers Andrey Konovalov
2020-10-01 17:18 ` elver
2020-09-24 22:50 ` [PATCH v3 02/39] kasan: KASAN_VMALLOC depends on KASAN_GENERIC Andrey Konovalov
2020-10-01 17:19 ` elver
2020-09-24 22:50 ` [PATCH v3 03/39] kasan: group vmalloc code Andrey Konovalov
2020-10-01 17:27 ` elver
2020-09-24 22:50 ` [PATCH v3 04/39] kasan: shadow declarations only for software modes Andrey Konovalov
2020-10-01 17:29 ` elver
2020-09-24 22:50 ` [PATCH v3 05/39] kasan: rename (un)poison_shadow to (un)poison_memory Andrey Konovalov
2020-10-01 17:29 ` elver
2020-09-24 22:50 ` [PATCH v3 06/39] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* Andrey Konovalov
2020-10-01 17:30 ` elver
2020-09-24 22:50 ` [PATCH v3 07/39] kasan: only build init.c for software modes Andrey Konovalov
2020-10-01 17:31 ` elver
2020-09-24 22:50 ` [PATCH v3 08/39] kasan: split out shadow.c from common.c Andrey Konovalov
2020-10-01 17:32 ` elver
2020-09-24 22:50 ` [PATCH v3 09/39] kasan: define KASAN_GRANULE_PAGE Andrey Konovalov
2020-10-01 17:33 ` elver
2020-09-24 22:50 ` [PATCH v3 10/39] kasan: rename report and tags files Andrey Konovalov
2020-10-01 17:36 ` elver
2020-09-24 22:50 ` [PATCH v3 11/39] kasan: don't duplicate config dependencies Andrey Konovalov
2020-10-01 17:39 ` elver
2020-10-01 21:54 ` Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 12/39] kasan: hide invalid free check implementation Andrey Konovalov
2020-10-01 17:41 ` elver
2020-09-24 22:50 ` [PATCH v3 13/39] kasan: decode stack frame only with KASAN_STACK_ENABLE Andrey Konovalov
2020-10-01 17:43 ` elver
2020-09-24 22:50 ` [PATCH v3 14/39] kasan, arm64: only init shadow for software modes Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 15/39] kasan, arm64: only use kasan_depth " Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 16/39] kasan: rename addr_has_shadow to addr_has_metadata Andrey Konovalov
2020-10-01 17:45 ` elver
2020-09-24 22:50 ` [PATCH v3 17/39] kasan: rename print_shadow_for_address to print_memory_metadata Andrey Konovalov
2020-10-01 17:45 ` elver
2020-09-24 22:50 ` [PATCH v3 18/39] kasan: kasan_non_canonical_hook only for software modes Andrey Konovalov
2020-10-01 17:47 ` elver
2020-09-24 22:50 ` [PATCH v3 19/39] kasan: rename SHADOW layout macros to META Andrey Konovalov
2020-10-01 17:48 ` elver
2020-09-24 22:50 ` [PATCH v3 20/39] kasan: separate metadata_fetch_row for each mode Andrey Konovalov
2020-10-01 17:54 ` elver
2020-10-01 21:56 ` Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 21/39] kasan: don't allow SW_TAGS with ARM64_MTE Andrey Konovalov
2020-10-01 17:55 ` elver
2020-10-01 21:57 ` Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 22/39] kasan: introduce CONFIG_KASAN_HW_TAGS Andrey Konovalov
2020-10-01 17:57 ` elver
2020-09-24 22:50 ` [PATCH v3 23/39] arm64: Enable armv8.5-a asm-arch option Andrey Konovalov
2020-09-25 10:16 ` Catalin Marinas
2020-09-24 22:50 ` [PATCH v3 24/39] arm64: mte: Add in-kernel MTE helpers Andrey Konovalov
2020-09-25 10:15 ` Catalin Marinas
2020-09-25 11:28 ` Vincenzo Frascino
2020-09-25 12:50 ` Catalin Marinas
2020-09-25 13:36 ` Vincenzo Frascino
2020-09-24 22:50 ` [PATCH v3 25/39] arm64: kasan: Add arch layer for memory tagging helpers Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 26/39] arm64: mte: Add in-kernel tag fault handler Andrey Konovalov
2020-09-25 10:49 ` Catalin Marinas
2020-09-25 11:26 ` Andrey Konovalov
2020-09-25 11:47 ` Catalin Marinas
2020-09-25 11:52 ` Andrey Konovalov
2020-09-25 12:35 ` Catalin Marinas
2020-09-25 12:35 ` Catalin Marinas
2020-09-24 22:50 ` [PATCH v3 27/39] arm64: kasan: Enable in-kernel MTE Andrey Konovalov
2020-09-25 11:14 ` Catalin Marinas
2020-09-24 22:50 ` [PATCH v3 28/39] arm64: mte: Convert gcr_user into an exclude mask Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 29/39] arm64: mte: Switch GCR_EL1 in kernel entry and exit Andrey Konovalov
2020-09-25 11:34 ` Catalin Marinas
2020-09-25 11:50 ` Vincenzo Frascino
2020-09-25 12:38 ` Catalin Marinas
2020-09-24 22:50 ` [PATCH v3 30/39] arm64: kasan: Enable TBI EL1 Andrey Konovalov
2020-09-25 11:37 ` Catalin Marinas
2020-09-25 11:47 ` Vincenzo Frascino
2020-09-24 22:50 ` [PATCH v3 31/39] arm64: kasan: Align allocations for HW_TAGS Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 32/39] kasan: define KASAN_GRANULE_SIZE " Andrey Konovalov
2020-10-01 17:58 ` elver
2020-10-01 21:59 ` Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 33/39] kasan, x86, s390: update undef CONFIG_KASAN Andrey Konovalov
2020-10-01 17:59 ` elver [this message]
2020-09-24 22:50 ` [PATCH v3 34/39] kasan, arm64: expand CONFIG_KASAN checks Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 35/39] kasan, arm64: implement HW_TAGS runtime Andrey Konovalov
2020-10-01 18:00 ` elver
2020-09-24 22:50 ` [PATCH v3 36/39] kasan, arm64: print report from tag fault handler Andrey Konovalov
2020-09-25 11:39 ` Catalin Marinas
2020-09-24 22:50 ` [PATCH v3 37/39] kasan, slub: reset tags when accessing metadata Andrey Konovalov
2020-10-01 18:03 ` elver
2020-10-01 22:00 ` Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 38/39] kasan, arm64: enable CONFIG_KASAN_HW_TAGS Andrey Konovalov
2020-09-24 22:50 ` [PATCH v3 39/39] kasan: add documentation for hardware tag-based mode Andrey Konovalov
2020-10-01 18:03 ` elver
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