Received: by 10.223.176.46 with SMTP id f43csp3895981wra; Tue, 23 Jan 2018 00:34:36 -0800 (PST) X-Google-Smtp-Source: AH8x226qpx88b8ul8b0kBC0VMdpYygEBz3CT9TXxKKfBny+e5e8eX5f1g9vVml0rbsKpSsWBLS9Y X-Received: by 2002:a17:902:6bc3:: with SMTP id m3-v6mr4903728plt.442.1516696476413; Tue, 23 Jan 2018 00:34:36 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1516696476; cv=none; d=google.com; s=arc-20160816; b=zEvs1tmHw+tIyEV4V0f1wytk1rHd3N73Kn9U+53+aK2LHyIEEDEVU9pMoy249RheOd njQL59/1UoLkhFDTCigoyyas0sEVm4p1jQuoTJFUtuQ7/oX0zCfXwZ5SCfNljeEUqaTQ TCFxaQHm5NN7AiEX6lo/pJt919Ak9I2okiusLHcKzMPTBZYAhs3dEdl3KH3LUavFobHr wNRWKm4IxFgAstokdTJtyixx2AoBe/ZtMdeKPRM3g/cVPghbaJSVEmwZMUONTlOCPESO +yBw5/qJnglkaBNBPZYKaCwIH6WmIu83BzbpQZflOeC5jhn8lDqzFNThoHDCQOjdAgxM S6uQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:to :from:date:dkim-signature:arc-authentication-results; bh=OPEHjNbB6da/PNcNzio9dzefN0PghdASYHrvQFbU40Y=; b=YHPH09YGrgtKbRMfPXrqWb5SCLs1OP8my/b/AoAvi70B+khcw6xXLxmpCVUjED2d6T htKq04KFXTp24KaB87CZRcMVF9uUP0QU3dwGH+UecsWGrkrZ8yZHoBdByl9AoOo5g5aR WAXTqBH8g4q8TyMd4p4DOGWmQkiuRhnpwktfh7TW/tTjeXIJZBKwmtYikOX4U1RhVvDd ra79WRV3NK+EKjzG4/WO6WgDGfBztbz21lj/yY6luSTQ2GwZxXN3KGeC2U5SzE4ZiO7B mBBoTOkyVN3xBl5xSptwJNai/fQCQsfy4aMjEv/rU7Z6oBopxwuLxPH8nm6QwoZwng0z McyQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=R1xc3At8; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l71si12392858pgd.305.2018.01.23.00.34.22; Tue, 23 Jan 2018 00:34:36 -0800 (PST) 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=@infradead.org header.s=bombadil.20170209 header.b=R1xc3At8; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751215AbeAWIdG (ORCPT + 99 others); Tue, 23 Jan 2018 03:33:06 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:42833 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751156AbeAWIdE (ORCPT ); Tue, 23 Jan 2018 03:33:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:To:From:Date:Sender:Reply-To:Cc: 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=OPEHjNbB6da/PNcNzio9dzefN0PghdASYHrvQFbU40Y=; b=R1xc3At8Q22yVvJQ6T2D3HvNl ucQi6zBuDAvP6h5uvMeM1aqU/aUp1DdEb/HuUmElkQTW9TR25CY29atm+E1D9oMjnwNHIJHuBeg6N ZfvvIJznDk9IcBnwTlc0Am4V6JT80JXw+JrYZdYS3jqB4J3cggtr8l84rQn/Jp/wuLlx2/+ZOQad6 1ukgsfz/tzqUvhwxCSROnRH8Z2D7sEwXdyBOWtkDYYsetXw43hO0sKO4hNRlPoN3tCRTa1Ih5mMK1 JH6+8PnZpmSen435v+r8b0pHKRHfUFtkjcLFK9MK3cCsUPRWVmK4FstyoTNexip7sW6ruJXeZWgrM u5yJIflMQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1edu0t-0007Fo-C0; Tue, 23 Jan 2018 08:33:03 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 7C4EC2029F9F9; Tue, 23 Jan 2018 09:33:00 +0100 (CET) Date: Tue, 23 Jan 2018 09:33:00 +0100 From: Peter Zijlstra To: Dave Jones , Linux Kernel Subject: Re: problematic rc9 futex changes. Message-ID: <20180123083300.GI2228@hirez.programming.kicks-ass.net> References: <20180123053446.GA19421@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180123053446.GA19421@codemonkey.org.uk> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 23, 2018 at 12:34:46AM -0500, Dave Jones wrote: > c1e2f0eaf015fb: "futex: Avoid violating the 10th rule of futex" seems to > make up a few new rules to violate. > > Coverity picked up these two problems in the same code: > Yeah, Geert also spotted it: https://lkml.kernel.org/r/20180122103947.GD2228@hirez.programming.kicks-ass.net I've been running the robustpi tests from glibc but have so far failed to actually trigger the bug. I think I'll just write up a Changelog and post the fix from the above link.