From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f50.google.com (mail-lf0-f50.google.com [209.85.215.50]) by kanga.kvack.org (Postfix) with ESMTP id 050736B0038 for ; Thu, 26 Nov 2015 07:22:23 -0500 (EST) Received: by lffu14 with SMTP id u14so96069971lff.1 for ; Thu, 26 Nov 2015 04:22:22 -0800 (PST) Received: from relay.parallels.com (relay.parallels.com. [195.214.232.42]) by mx.google.com with ESMTPS id pd10si18542226lbc.109.2015.11.26.04.22.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 Nov 2015 04:22:21 -0800 (PST) Subject: Re: [PATCH v7 0/4] KASAN for arm64 References: <1444665180-301-1-git-send-email-ryabinin.a.a@gmail.com> <20151013083432.GG6320@e104818-lin.cambridge.arm.com> <5649BAFD.6030005@arm.com> <5649F783.40109@gmail.com> <564B40A7.1000206@arm.com> <564B4BFC.1020905@virtuozzo.com> <20151126121007.GC32343@leverpostej> From: Andrey Ryabinin Message-ID: <5656F991.8090108@virtuozzo.com> Date: Thu, 26 Nov 2015 15:22:41 +0300 MIME-Version: 1.0 In-Reply-To: <20151126121007.GC32343@leverpostej> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Mark Rutland , Catalin Marinas Cc: "Suzuki K. Poulose" , Yury , Arnd Bergmann , linux-mm@kvack.org, Linus Walleij , Ard Biesheuvel , Will Deacon , linux-kernel@vger.kernel.org, kasan-dev , Alexey Klimov , Alexander Potapenko , Dmitry Vyukov , David Keitel , linux-arm-kernel@lists.infradead.org On 11/26/2015 03:10 PM, Mark Rutland wrote: > Hi Catalin, > > Can you pick up Andrey's patch below for v4.4, until we have a better > solution? > FYI, better solution is almost ready, I'm going to send it today. However, I don't know for sure whether it works or not :) I'm not able to test as I don't have any setup working with 16k pages. > I stumbled across this myself and was about to post a similar patch. > > FWIW: > > Acked-by: Mark Rutland > > 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 >> 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 >> Signed-off-by: Andrey Ryabinin >> --- >> 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 >> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org