[v4,21/39] kasan, arm64: don't allow SW_TAGS with ARM64_MTE

Message ID	a8a68f89df9e516b8a09fe56abbe930b8f3e8a05.1601593784.git.andreyknvl@google.com (mailing list archive)
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Headers	show Return-Path: <SRS0=jQA9=DI=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B5D9E206CA Date: Fri, 2 Oct 2020 01:10:22 +0200 In-Reply-To: <cover.1601593784.git.andreyknvl@google.com> Message-Id: <a8a68f89df9e516b8a09fe56abbe930b8f3e8a05.1601593784.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1601593784.git.andreyknvl@google.com> Subject: [PATCH v4 21/39] kasan, arm64: don't allow SW_TAGS with ARM64_MTE From: Andrey Konovalov <andreyknvl@google.com> To: Dmitry Vyukov <dvyukov@google.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, kasan-dev@googlegroups.com Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>, Elena Petrova <lenaptr@google.com>, Branislav Rankov <Branislav.Rankov@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>, Andrew Morton <akpm@linux-foundation.org>, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov <andreyknvl@google.com> Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	kasan: add hardware tag-based mode for arm64 \| expand [v4,00/39] kasan: add hardware tag-based mode for arm64 [v4,01/39] kasan: drop unnecessary GPL text from comment headers [v4,02/39] kasan: KASAN_VMALLOC depends on KASAN_GENERIC [v4,03/39] kasan: group vmalloc code [v4,04/39] kasan: shadow declarations only for software modes [v4,05/39] kasan: rename (un)poison_shadow to (un)poison_memory [v4,06/39] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* [v4,07/39] kasan: only build init.c for software modes [v4,08/39] kasan: split out shadow.c from common.c [v4,09/39] kasan: define KASAN_GRANULE_PAGE [v4,10/39] kasan: rename report and tags files [v4,11/39] kasan: don't duplicate config dependencies [v4,12/39] kasan: hide invalid free check implementation [v4,13/39] kasan: decode stack frame only with KASAN_STACK_ENABLE [v4,14/39] kasan, arm64: only init shadow for software modes [v4,15/39] kasan, arm64: only use kasan_depth for software modes [v4,16/39] kasan: rename addr_has_shadow to addr_has_metadata [v4,17/39] kasan: rename print_shadow_for_address to print_memory_metadata [v4,18/39] kasan: kasan_non_canonical_hook only for software modes [v4,19/39] kasan: rename SHADOW layout macros to META [v4,20/39] kasan: separate metadata_fetch_row for each mode [v4,21/39] kasan, arm64: don't allow SW_TAGS with ARM64_MTE [v4,22/39] kasan: introduce CONFIG_KASAN_HW_TAGS [v4,23/39] arm64: Enable armv8.5-a asm-arch option [v4,24/39] arm64: mte: Add in-kernel MTE helpers [v4,25/39] arm64: kasan: Add arch layer for memory tagging helpers [v4,26/39] arm64: mte: Add in-kernel tag fault handler [v4,27/39] arm64: kasan: Enable in-kernel MTE [v4,28/39] arm64: mte: Convert gcr_user into an exclude mask [v4,29/39] arm64: mte: Switch GCR_EL1 in kernel entry and exit [v4,30/39] arm64: kasan: Enable TBI EL1 [v4,31/39] arm64: kasan: Align allocations for HW_TAGS [v4,32/39] kasan: define KASAN_GRANULE_SIZE for HW_TAGS [v4,33/39] kasan, x86, s390: update undef CONFIG_KASAN [v4,34/39] kasan, arm64: expand CONFIG_KASAN checks [v4,35/39] kasan, arm64: implement HW_TAGS runtime [v4,36/39] kasan, arm64: print report from tag fault handler [v4,37/39] kasan, mm: reset tags when accessing metadata [v4,38/39] kasan, arm64: enable CONFIG_KASAN_HW_TAGS [v4,39/39] kasan: add documentation for hardware tag-based mode

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DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B5D9E206CA
Date: Fri,  2 Oct 2020 01:10:22 +0200
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Subject: [PATCH v4 21/39] kasan, arm64: don't allow SW_TAGS with ARM64_MTE
From: Andrey Konovalov <andreyknvl@google.com>
To: Dmitry Vyukov <dvyukov@google.com>,
 Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>, kasan-dev@googlegroups.com
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
 Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>,
	Elena Petrova <lenaptr@google.com>,
 Branislav Rankov <Branislav.Rankov@arm.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>, Will Deacon <will.deacon@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
 linux-arm-kernel@lists.infradead.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrey Konovalov <andreyknvl@google.com>
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Series

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

Commit Message

Andrey Konovalov Oct. 1, 2020, 11:10 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 e7450fbd0aa7..e875db8e1c86 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -131,7 +131,7 @@  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

[v4,21/39] kasan, arm64: don't allow SW_TAGS with ARM64_MTE

Commit Message

Patch