[v8,24/43] kasan, arm64: don't allow SW_TAGS with ARM64_MTE

Message ID	c7401464c398ae353f996e2e7af5892578cfc932.1604531793.git.andreyknvl@google.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=3g0P=EL=lists.infradead.org=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0962520786 Date: Thu, 5 Nov 2020 00:18:39 +0100 In-Reply-To: <cover.1604531793.git.andreyknvl@google.com> Message-Id: <c7401464c398ae353f996e2e7af5892578cfc932.1604531793.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1604531793.git.andreyknvl@google.com> Subject: [PATCH v8 24/43] kasan, arm64: don't allow SW_TAGS with ARM64_MTE From: Andrey Konovalov <andreyknvl@google.com> To: Catalin Marinas <catalin.marinas@arm.com> Precedence: list Cc: linux-arm-kernel@lists.infradead.org, Marco Elver <elver@google.com>, Andrey Konovalov <andreyknvl@google.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>, Branislav Rankov <Branislav.Rankov@arm.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, 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> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	kasan: add hardware tag-based mode for arm64 \| expand [v8,00/43] kasan: add hardware tag-based mode for arm64 [v8,01/43] kasan: drop unnecessary GPL text from comment headers [v8,02/43] kasan: KASAN_VMALLOC depends on KASAN_GENERIC [v8,03/43] kasan: group vmalloc code [v8,04/43] s390/kasan: include asm/page.h from asm/kasan.h [v8,05/43] kasan: shadow declarations only for software modes [v8,07/43] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* [v8,08/43] kasan: only build init.c for software modes [v8,09/43] kasan: split out shadow.c from common.c [v8,10/43] kasan: define KASAN_GRANULE_PAGE [v8,11/43] kasan: rename report and tags files [v8,12/43] kasan: don't duplicate config dependencies [v8,13/43] kasan: hide invalid free check implementation [v8,14/43] kasan: decode stack frame only with KASAN_STACK_ENABLE [v8,15/43] kasan, arm64: only init shadow for software modes [v8,16/43] kasan, arm64: only use kasan_depth for software modes [v8,17/43] kasan, arm64: move initialization message [v8,18/43] kasan, arm64: rename kasan_init_tags and mark as __init [v8,19/43] kasan: rename addr_has_shadow to addr_has_metadata [v8,20/43] kasan: rename print_shadow_for_address to print_memory_metadata [v8,21/43] kasan: kasan_non_canonical_hook only for software modes [v8,22/43] kasan: rename SHADOW layout macros to META [v8,23/43] kasan: separate metadata_fetch_row for each mode [v8,24/43] kasan, arm64: don't allow SW_TAGS with ARM64_MTE [v8,25/43] kasan: introduce CONFIG_KASAN_HW_TAGS [v8,26/43] arm64: Enable armv8.5-a asm-arch option [v8,27/43] arm64: mte: Add in-kernel MTE helpers [v8,28/43] arm64: mte: Reset the page tag in page->flags [v8,29/43] arm64: mte: Add in-kernel tag fault handler [v8,30/43] arm64: kasan: Allow enabling in-kernel MTE [v8,31/43] arm64: mte: Convert gcr_user into an exclude mask [v8,32/43] arm64: mte: Switch GCR_EL1 in kernel entry and exit [v8,33/43] arm64: kasan: Align allocations for HW_TAGS [v8,34/43] arm64: kasan: Add arch layer for memory tagging helpers [v8,35/43] kasan: define KASAN_GRANULE_SIZE for HW_TAGS [v8,36/43] kasan, x86, s390: update undef CONFIG_KASAN [v8,37/43] kasan, arm64: expand CONFIG_KASAN checks [v8,38/43] kasan, arm64: implement HW_TAGS runtime [v8,39/43] kasan, arm64: print report from tag fault handler [v8,40/43] kasan, mm: reset tags when accessing metadata [v8,41/43] kasan, arm64: enable CONFIG_KASAN_HW_TAGS [v8,42/43] kasan: add documentation for hardware tag-based mode [v8,43/43] kselftest/arm64: Check GCR_EL1 after context switch

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c7401464c398ae353f996e2e7af5892578cfc932.1604531793.git.andreyknvl@google.com (mailing list archive)

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Subject: [PATCH v8 24/43] kasan, arm64: don't allow SW_TAGS with ARM64_MTE
From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Precedence: list
Cc: linux-arm-kernel@lists.infradead.org, Marco Elver <elver@google.com>,
 Andrey Konovalov <andreyknvl@google.com>,
 Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>,
 Branislav Rankov <Branislav.Rankov@arm.com>, kasan-dev@googlegroups.com,
 linux-kernel@vger.kernel.org, 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>
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 linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org

Series

kasan: add hardware tag-based mode for arm64 | expand

Commit Message

Andrey Konovalov Nov. 4, 2020, 11:18 p.m. UTC

Software tag-based KASAN provides its own tag checking machinery that
can conflict with MTE. Don't allow enabling software tag-based KASAN
when MTE is enabled.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
Change-Id: Icd29bd0c6b1d3d7a0ee3d50c20490f404d34fc97
---
 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1d466addb078..d58b4dcc6d44 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -134,7 +134,7 @@  config ARM64
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 	select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
-	select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
+	select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE)
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_MMAP_RND_BITS
 	select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT

[v8,24/43] kasan, arm64: don't allow SW_TAGS with ARM64_MTE

Commit Message

Patch