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[209.132.180.67]) by mx.google.com with ESMTP id s66si20540422pgs.592.2019.07.18.09.23.39; Thu, 18 Jul 2019 09:23:55 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@sirena.org.uk header.s=20170815-heliosphere header.b=qYExk+w1; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727812AbfGRQXQ (ORCPT + 99 others); Thu, 18 Jul 2019 12:23:16 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:45454 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726040AbfGRQXP (ORCPT ); Thu, 18 Jul 2019 12:23:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=u88OQSng8pqPv+xn+R4kAUlsl3qCV7o4uVNlPX15ue8=; b=qYExk+w1vbwc0rCB7fAgxwakH r0od6lDOr3H/+/SR6yuwp6kCzxy2VecJb4DJ0MokSnQxpeYb7cZoPZMp7VjZWsApTHk9bLQV/NC4L dVI8g8ehwmXAB4CJuCO+hnc6yVtfHitvJKnxynMhYhyW2weDb59Nm6l2QuHxPa6Zn6KA0=; Received: from ypsilon.sirena.org.uk ([2001:470:1f1d:6b5::7]) by heliosphere.sirena.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ho9BX-0005Yo-7M; Thu, 18 Jul 2019 16:23:11 +0000 Received: by ypsilon.sirena.org.uk (Postfix, from userid 1000) id 25436274175C; Thu, 18 Jul 2019 17:23:10 +0100 (BST) Date: Thu, 18 Jul 2019 17:23:10 +0100 From: Mark Brown To: Andrey Ryabinin Cc: Arnd Bergmann , Andrew Morton , Qian Cai , Vasily Gorbik , Andrey Konovalov , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH] kasan: push back KASAN_STACK detection to clang-10 Message-ID: <20190718162310.GG5761@sirena.org.uk> References: <20190718141503.3258299-1-arnd@arndb.de> <0ee5952b-5a76-c8a5-a30a-ee3c46a54814@virtuozzo.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="qp4W5+cUSnZs0RIF" Content-Disposition: inline In-Reply-To: <0ee5952b-5a76-c8a5-a30a-ee3c46a54814@virtuozzo.com> X-Cookie: Oh, wow! Look at the moon! User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --qp4W5+cUSnZs0RIF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Jul 18, 2019 at 07:18:28PM +0300, Andrey Ryabinin wrote: > On 7/18/19 5:14 PM, Arnd Bergmann wrote: > > asan-stack mode still uses dangerously large kernel stacks of > > tens of kilobytes in some drivers, and it does not seem that anyone > > is working on the clang bug. > > - default !(CLANG_VERSION < 90000) > > + default !(CLANG_VERSION < 100000) > Wouldn't be better to make this thing for any clang version? And only when the bug is > finally fixed, specify the clang version which can enable this safely. 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