From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752783Ab1GVBlG (ORCPT ); Thu, 21 Jul 2011 21:41:06 -0400 Received: from gate.crashing.org ([63.228.1.57]:41932 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751587Ab1GVBlD (ORCPT ); Thu, 21 Jul 2011 21:41:03 -0400 Subject: Re: [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of dirty & young From: Benjamin Herrenschmidt To: Andrew Morton Cc: Shan Hai , Peter Zijlstra , Peter Zijlstra , paulus@samba.org, tglx@linutronix.de, walken@google.com, dhowells@redhat.com, cmetcalf@tilera.com, tony.luck@intel.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: <20110721155938.2ff2dab5.akpm@linux-foundation.org> References: <1310717238-13857-1-git-send-email-haishan.bai@gmail.com> <1310717238-13857-2-git-send-email-haishan.bai@gmail.com> <1310725418.2586.309.camel@twins> <4E21A526.8010904@gmail.com> <1310860194.25044.17.camel@pasglop> <4b337921-d430-4b63-bc36-ad31753cf800@email.android.com> <1310912990.25044.203.camel@pasglop> <1310944453.25044.262.camel@pasglop> <1310961691.25044.274.camel@pasglop> <4E23D728.7090406@gmail.com> <1310972462.25044.292.camel@pasglop> <4E23E02C.8090401@gmail.com> <1310974591.25044.298.camel@pasglop> <4E24FA51.70602@gmail.com> <1311049762.25044.392.camel@pasglop> <20110721153606.37e6f432.akpm@linux-foundation.org> <1311288726.25044.545.camel@pasglop> <20110721155938.2ff2dab5.akpm@linux-foundation.org> Content-Type: text/plain; charset="UTF-8" Date: Fri, 22 Jul 2011 11:40:15 +1000 Message-ID: <1311298815.25044.562.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > You're not understanding me. > > I need a good reason to merge this into 3.0. > > The -stable maintainers need even better reasons to merge this into > earlier kernels. > > Please provide those reasons! > > (Documentation/stable_kernel_rules.txt, 4th bullet) > > (And it's not just me and -stable maintainers. Distro maintainers will > also look at this patch and wonder whether they should merge it) Well, as an arch maintainer, I can get stable maintainers to merge anything I CC to stable :-) Now, the good reason should have been rather obvious... it's a user exploitable kernel lockup. Cheers, Ben. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id DDB9DB6F6B for ; Fri, 22 Jul 2011 11:40:53 +1000 (EST) Subject: Re: [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of dirty & young From: Benjamin Herrenschmidt To: Andrew Morton In-Reply-To: <20110721155938.2ff2dab5.akpm@linux-foundation.org> References: <1310717238-13857-1-git-send-email-haishan.bai@gmail.com> <1310717238-13857-2-git-send-email-haishan.bai@gmail.com> <1310725418.2586.309.camel@twins> <4E21A526.8010904@gmail.com> <1310860194.25044.17.camel@pasglop> <4b337921-d430-4b63-bc36-ad31753cf800@email.android.com> <1310912990.25044.203.camel@pasglop> <1310944453.25044.262.camel@pasglop> <1310961691.25044.274.camel@pasglop> <4E23D728.7090406@gmail.com> <1310972462.25044.292.camel@pasglop> <4E23E02C.8090401@gmail.com> <1310974591.25044.298.camel@pasglop> <4E24FA51.70602@gmail.com> <1311049762.25044.392.camel@pasglop> <20110721153606.37e6f432.akpm@linux-foundation.org> <1311288726.25044.545.camel@pasglop> <20110721155938.2ff2dab5.akpm@linux-foundation.org> Content-Type: text/plain; charset="UTF-8" Date: Fri, 22 Jul 2011 11:40:15 +1000 Message-ID: <1311298815.25044.562.camel@pasglop> Mime-Version: 1.0 Cc: tony.luck@intel.com, Peter Zijlstra , Shan Hai , Peter Zijlstra , linux-kernel@vger.kernel.org, cmetcalf@tilera.com, dhowells@redhat.com, paulus@samba.org, tglx@linutronix.de, walken@google.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > You're not understanding me. > > I need a good reason to merge this into 3.0. > > The -stable maintainers need even better reasons to merge this into > earlier kernels. > > Please provide those reasons! > > (Documentation/stable_kernel_rules.txt, 4th bullet) > > (And it's not just me and -stable maintainers. Distro maintainers will > also look at this patch and wonder whether they should merge it) Well, as an arch maintainer, I can get stable maintainers to merge anything I CC to stable :-) Now, the good reason should have been rather obvious... it's a user exploitable kernel lockup. Cheers, Ben.