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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 83DEAC43381 for ; Wed, 6 Mar 2019 14:56:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4965E20661 for ; Wed, 6 Mar 2019 14:56:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="zH8idhIB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727868AbfCFO4L (ORCPT ); Wed, 6 Mar 2019 09:56:11 -0500 Received: from merlin.infradead.org ([205.233.59.134]:43244 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726934AbfCFO4L (ORCPT ); Wed, 6 Mar 2019 09:56:11 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; 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=xmT55/5WlJ0QFSDA/Ks3ngPR4acCDaeEYEkPGFybcTQ=; b=zH8idhIBNIzYMbCdqZF05au7x TU/W656y5T1oedakDgLuLdoTuEtWOzRnA/+3e2IWoa8yIXeA2ZTk2ZAeDRuMbhMU0KKxTNOC/eBEc soQ+cN+c55ohekCCsnnY71D6M17az7rN17p6jO/2NU11pCj0vnNW0nz7j8mwa1a1atIBfd3g9IxvH IViF62gEiqOo4kFoLfX3qoicLK6MmJ9OnuVEUXH5paVh6yL6te9Qg3sR0czj4XjzgHw+JF5NNHSSy EJt34PDQpbewMXvQAiR0eBBNyfdYNM3RJhEzLnX8R+0utR1G1nTnDGSy0vvtHMd4VjzpBK0yqs+7o Q4dctlCmg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1h1Xxc-0003RE-Ur; Wed, 06 Mar 2019 14:55:57 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id ACD4A29B0D0D8; Wed, 6 Mar 2019 15:55:55 +0100 (CET) Date: Wed, 6 Mar 2019 15:55:55 +0100 From: Peter Zijlstra To: Dmitry Vyukov Cc: Linus Torvalds , Thomas Gleixner , "H. Peter Anvin" , Julien Thierry , Will Deacon , Andy Lutomirski , Ingo Molnar , Catalin Marinas , James Morse , valentin.schneider@arm.com, Brian Gerst , Josh Poimboeuf , Andy Lutomirski , Borislav Petkov , Denys Vlasenko , LKML , Andrey Ryabinin Subject: Re: [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception Message-ID: <20190306145555.GX32477@hirez.programming.kicks-ass.net> References: <20190301144556.GY32477@hirez.programming.kicks-ass.net> <20190301152305.GJ32494@hirez.programming.kicks-ass.net> <20190306131347.GX32534@hirez.programming.kicks-ass.net> <20190306135728.GV32477@hirez.programming.kicks-ass.net> <20190306141237.GW32477@hirez.programming.kicks-ass.net> <20190306143439.GY32534@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 On Wed, Mar 06, 2019 at 03:40:51PM +0100, Dmitry Vyukov wrote: > On Wed, Mar 6, 2019 at 3:34 PM Peter Zijlstra wrote: > > mm/kasan/generic_report.o: warning: objtool: __asan_report_load1_noabort()+0x0: call to __fentry__() with UACCESS enabled > But if it makes things simpler for the objtool, then I think we can > disable function tracer for generic_report.c too. It's not simpler; it is actually a correctness issue. Those functions must not call into the tracer with AC=1