From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx203.postini.com [74.125.245.203]) by kanga.kvack.org (Postfix) with SMTP id 4C8DB6B007E for ; Wed, 29 Feb 2012 15:36:58 -0500 (EST) Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 29 Feb 2012 15:36:57 -0500 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 9842D38C8076 for ; Wed, 29 Feb 2012 15:36:54 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q1TKaaFd206342 for ; Wed, 29 Feb 2012 15:36:44 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q1TKaae3014684 for ; Wed, 29 Feb 2012 15:36:36 -0500 Message-ID: <4F4E8C46.3040005@linux.vnet.ibm.com> Date: Wed, 29 Feb 2012 12:36:22 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: [RFC][PATCH] fix move/migrate_pages() race on task struct References: <20120223180740.C4EC4156@kernel> <4F468F09.5050200@linux.vnet.ibm.com> <4F469BC7.50705@linux.vnet.ibm.com> <4F47BF56.6010602@linux.vnet.ibm.com> <4F47C800.4090903@linux.vnet.ibm.com> <87sjhzun47.fsf@xmission.com> <87d390janv.fsf@xmission.com> <20120229123120.127e21fd.akpm@linux-foundation.org> In-Reply-To: <20120229123120.127e21fd.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Christoph Lameter , "Eric W. Biederman" , linux-kernel@vger.kernel.org, linux-mm@kvack.org On 02/29/2012 12:31 PM, Andrew Morton wrote: > What was the user-visible impact of the bug? It'll probably oops dereferencing task->cred: https://lkml.org/lkml/2012/2/23/302 Although I was never actually able to get it to trigger without some code to enlarge the race window. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org