Message ID | 99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Tue, 04 Aug 2020 05:41:42 -0700 (PDT) Date: Tue, 4 Aug 2020 14:41:27 +0200 In-Reply-To: <cover.1596544734.git.andreyknvl@google.com> Message-Id: <99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1596544734.git.andreyknvl@google.com> X-Mailer: git-send-email 2.28.0.163.g6104cc2f0b6-goog Subject: [PATCH v2 4/5] kasan: allow enabling stack tagging for tag-based mode From: Andrey Konovalov <andreyknvl@google.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, Marco Elver <elver@google.com>, Ard Biesheuvel <ardb@kernel.org>, Arvind Sankar <nivedita@alum.mit.edu>, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Walter Wu <walter-zh.wu@mediatek.com>, Elena Petrova <lenaptr@google.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Andrey Konovalov <andreyknvl@google.com> Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: CB86E100471EF X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
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kasan: support stack instrumentation for tag-based mode
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expand
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diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 03757cc60e06..f4beee1b0013 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -44,7 +44,8 @@ else endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ - -mllvm -hwasan-instrument-stack=0 \ + -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ + -mllvm -hwasan-use-short-granules=0 \ $(instrumentation_flags) endif # CONFIG_KASAN_SW_TAGS
Use CONFIG_KASAN_STACK to enable stack tagging. Note, that HWASAN short granules [1] are disabled. Supporting those will require more kernel changes. [1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- scripts/Makefile.kasan | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)