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From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>,
	kasan-dev@googlegroups.com, Dmitry Vyukov <dvyukov@google.com>,
	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>,
	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>
Subject: [PATCH v5 27/40] kasan: kasan_non_canonical_hook only for software modes
Date: Mon, 12 Oct 2020 22:44:33 +0200	[thread overview]
Message-ID: <4e28900397138acc0ea8a99cdff234ba68da518b.1602535397.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1602535397.git.andreyknvl@google.com>

This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.

kasan_non_canonical_hook() is only applicable to KASAN modes that use
shadow memory, and won't be needed for hardware tag-based KASAN.

No functional changes for software modes.

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: Icc9f5ef100a2e86f3a4214a0c3131a68266181b2
---
 mm/kasan/report.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 9e4d539d62f4..67aa30b45805 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -371,7 +371,8 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write,
 	return ret;
 }
 
-#ifdef CONFIG_KASAN_INLINE
+#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
+	defined(CONFIG_KASAN_INLINE)
 /*
  * With CONFIG_KASAN_INLINE, accesses to bogus pointers (outside the high
  * canonical half of the address space) cause out-of-bounds shadow memory reads
-- 
2.28.0.1011.ga647a8990f-goog


  parent reply	other threads:[~2020-10-12 20:47 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12 20:44 [PATCH v5 00/40] kasan: add hardware tag-based mode for arm64 Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 01/40] arm64: Enable armv8.5-a asm-arch option Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 02/40] arm64: mte: Add in-kernel MTE helpers Andrey Konovalov
2020-10-28 11:28   ` Dmitry Vyukov
2020-10-29 16:50     ` Andrey Konovalov
2020-11-04 17:49       ` Vincenzo Frascino
2020-10-12 20:44 ` [PATCH v5 03/40] arm64: mte: Reset the page tag in page->flags Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 04/40] arm64: kasan: Add arch layer for memory tagging helpers Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 05/40] arm64: mte: Add in-kernel tag fault handler Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 06/40] arm64: kasan: Enable in-kernel MTE Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 07/40] arm64: mte: Convert gcr_user into an exclude mask Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 08/40] arm64: mte: Switch GCR_EL1 in kernel entry and exit Andrey Konovalov
2020-10-28 10:06   ` Dmitry Vyukov
2020-10-29 16:52     ` Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 09/40] arm64: kasan: Align allocations for HW_TAGS Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 10/40] kasan: drop unnecessary GPL text from comment headers Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 11/40] kasan: KASAN_VMALLOC depends on KASAN_GENERIC Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 12/40] kasan: group vmalloc code Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 13/40] kasan: shadow declarations only for software modes Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 14/40] kasan: rename (un)poison_shadow to (un)poison_memory Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 15/40] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 16/40] kasan: only build init.c for software modes Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 17/40] kasan: split out shadow.c from common.c Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 18/40] kasan: define KASAN_GRANULE_PAGE Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 19/40] kasan: rename report and tags files Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 20/40] kasan: don't duplicate config dependencies Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 21/40] kasan: hide invalid free check implementation Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 22/40] kasan: decode stack frame only with KASAN_STACK_ENABLE Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 23/40] kasan, arm64: only init shadow for software modes Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 24/40] kasan, arm64: only use kasan_depth " Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 25/40] kasan: rename addr_has_shadow to addr_has_metadata Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 26/40] kasan: rename print_shadow_for_address to print_memory_metadata Andrey Konovalov
2020-10-12 20:44 ` Andrey Konovalov [this message]
2020-10-12 20:44 ` [PATCH v5 28/40] kasan: rename SHADOW layout macros to META Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 29/40] kasan: separate metadata_fetch_row for each mode Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 30/40] kasan, arm64: don't allow SW_TAGS with ARM64_MTE Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 31/40] kasan: introduce CONFIG_KASAN_HW_TAGS Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 32/40] kasan: define KASAN_GRANULE_SIZE for HW_TAGS Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 33/40] kasan, x86, s390: update undef CONFIG_KASAN Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 34/40] kasan, arm64: expand CONFIG_KASAN checks Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 35/40] kasan, arm64: implement HW_TAGS runtime Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 36/40] kasan, arm64: print report from tag fault handler Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 37/40] kasan, mm: reset tags when accessing metadata Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 38/40] kasan, arm64: enable CONFIG_KASAN_HW_TAGS Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 39/40] kasan: add documentation for hardware tag-based mode Andrey Konovalov
2020-10-12 20:44 ` [PATCH v5 40/40] kselftest/arm64: Check GCR_EL1 after context switch Andrey Konovalov

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