From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E0CCC433E1 for ; Thu, 27 Aug 2020 08:06:33 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E788D20786 for ; Thu, 27 Aug 2020 08:06:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cpCCVfc6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E788D20786 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=T+BoD75zWpfR2KOl618WpJllNmiXZkgVAQpnR78khN0=; b=cpCCVfc66/ew+gSiUOyQnk53R SBQDzrZCcriDhbmHpACtEsotmZ3v26Nip8V6veIH8XnMUwkCfIP/sseoxZqqcmWcAT6hDEW6EU4Yw pfd0Aw7OWkdZfxPlDumLQwqQjAXXcDE7se8TZL53N2ePgdkWlfjscZk7u0q/yDW1R87vdIhvGBqTb 6kDBNFt3uqHiczU87LMITSWRL9/YQf9lq6guBx5oxou9lRpgdxOxg6oS65yeJEGzfW/b2MEvkB4u8 l1HTTkvJHjor6UtiGMXCd+jZVl9YkMlvVO8wZMjnJDIeCkYPtA1AEDj5NiZR0ScdHTBptRU5xEJzs 7ahGnSNDA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBCtw-0004L5-D3; Thu, 27 Aug 2020 08:04:52 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kBCtt-0004Kl-1a for linux-arm-kernel@lists.infradead.org; Thu, 27 Aug 2020 08:04:50 +0000 Received: from gaia (unknown [46.69.195.127]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C5ED122BF3; Thu, 27 Aug 2020 08:04:45 +0000 (UTC) Date: Thu, 27 Aug 2020 09:04:43 +0100 From: Catalin Marinas To: Andrey Konovalov Subject: Re: [PATCH 19/35] kasan: don't allow SW_TAGS with ARM64_MTE Message-ID: <20200827080442.GA29264@gaia> References: <5185661d553238884613a432cf1d71b1480a23ba.1597425745.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5185661d553238884613a432cf1d71b1480a23ba.1597425745.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200827_040449_178255_984EB83D X-CRM114-Status: GOOD ( 18.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Marco Elver , Elena Petrova , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko , Evgenii Stepanov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Aug 14, 2020 at 07:27:01PM +0200, Andrey Konovalov wrote: > 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 > --- > lib/Kconfig.kasan | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index b4cf6c519d71..e500c18cbe79 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -69,6 +69,7 @@ config KASAN_GENERIC > config KASAN_SW_TAGS > bool "Software tag-based mode" > depends on HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS > + depends on !ARM64_MTE I think that's better as: diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 10cf81d70657..736c32bd8905 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 -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel