From: Mark Rutland <mark.rutland@arm.com>
To: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Catalin Marinas <catalin.marinas@arm.com>
Cc: "Suzuki K. Poulose" <Suzuki.Poulose@arm.com>,
Yury <yury.norov@gmail.com>, Arnd Bergmann <arnd@arndb.de>,
linux-mm@kvack.org, Linus Walleij <linus.walleij@linaro.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org,
kasan-dev <kasan-dev@googlegroups.com>,
Alexey Klimov <klimov.linux@gmail.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Konovalov <andreyknvl@google.com>,
David Keitel <dkeitel@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 0/4] KASAN for arm64
Date: Thu, 26 Nov 2015 12:10:08 +0000 [thread overview]
Message-ID: <20151126121007.GC32343@leverpostej> (raw)
In-Reply-To: <564B4BFC.1020905@virtuozzo.com>
Hi Catalin,
Can you pick up Andrey's patch below for v4.4, until we have a better
solution?
I stumbled across this myself and was about to post a similar patch.
FWIW:
Acked-by: Mark Rutland <mark.rutland@arm.com>
Thanks,
Mark.
On Tue, Nov 17, 2015 at 06:47:08PM +0300, Andrey Ryabinin wrote:
> We should either add proper Kconfig dependency for now, or just make it work.
>
>
> From: Andrey Ryabinin <aryabinin@virtuozzo.com>
> Subject: [PATCH] arm64: KASAN depends on !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
>
> On KASAN + 16K_PAGES + 48BIT_VA
> arch/arm64/mm/kasan_init.c: In function a??kasan_early_inita??:
> include/linux/compiler.h:484:38: error: call to a??__compiletime_assert_95a?? declared with attribute error: BUILD_BUG_ON failed: !IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE)
> _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>
> Currently KASAN will not work on 16K_PAGES and 48BIT_VA, so
> forbid such configuration to avoid above build failure.
>
> Reported-by: Suzuki K. Poulose <Suzuki.Poulose@arm.com>
> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
> ---
> arch/arm64/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 9ac16a4..bf7de69 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -49,7 +49,7 @@ config ARM64
> select HAVE_ARCH_AUDITSYSCALL
> select HAVE_ARCH_BITREVERSE
> select HAVE_ARCH_JUMP_LABEL
> - select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP
> + select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
> select HAVE_ARCH_KGDB
> select HAVE_ARCH_SECCOMP_FILTER
> select HAVE_ARCH_TRACEHOOK
> --
> 2.4.10
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
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next prev parent reply other threads:[~2015-11-26 12:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-12 15:52 [PATCH v7 0/4] KASAN for arm64 Andrey Ryabinin
2015-10-12 15:52 ` [PATCH v7 1/4] arm64: move PGD_SIZE definition to pgalloc.h Andrey Ryabinin
2015-10-12 15:52 ` [PATCH v7 2/4] arm64: add KASAN support Andrey Ryabinin
2015-10-12 15:52 ` [PATCH v7 3/4] ARM64: kasan: print memory assignment Andrey Ryabinin
2015-10-12 15:53 ` [PATCH v7 4/4] Documentation/features/KASAN: arm64 supports KASAN now Andrey Ryabinin
2015-10-13 8:34 ` [PATCH v7 0/4] KASAN for arm64 Catalin Marinas
2015-11-16 11:16 ` Suzuki K. Poulose
2015-11-16 15:34 ` Andrey Ryabinin
2015-11-16 16:51 ` Catalin Marinas
2015-11-18 14:33 ` Andrey Ryabinin
2015-11-18 15:48 ` Suzuki K. Poulose
2015-11-18 15:52 ` Ard Biesheuvel
2015-11-18 17:24 ` Catalin Marinas
2015-11-17 14:58 ` Suzuki K. Poulose
2015-11-17 15:47 ` Andrey Ryabinin
2015-11-26 12:10 ` Mark Rutland [this message]
2015-11-26 12:22 ` Andrey Ryabinin
2015-11-26 15:05 ` Catalin Marinas
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