Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753493AbaGTTvb (ORCPT ); Sun, 20 Jul 2014 15:51:31 -0400 Received: from mail-we0-f172.google.com ([74.125.82.172]:60785 "EHLO mail-we0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753008AbaGTTv3 (ORCPT ); Sun, 20 Jul 2014 15:51:29 -0400 Message-ID: <53CC1DBD.2020202@suse.cz> Date: Sun, 20 Jul 2014 21:51:25 +0200 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Hugh Dickins CC: stable@vger.kernel.org, linux-kernel@vger.kernel.org, Naoya Horiguchi , Christoph Lameter , Andrew Morton , Linus Torvalds Subject: Re: [PATCH 3.12 100/170] hugetlb: fix copy_hugetlb_page_range() to handle migration/hwpoisoned entry References: <48e8cad86bb1241c08bdaa80db022c25068ff8e0.1405685481.git.jslaby@suse.cz> In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/18/2014 08:53 PM, Hugh Dickins wrote: > On Fri, 18 Jul 2014, Jiri Slaby wrote: > >> From: Naoya Horiguchi >> >> 3.12-stable review patch. If anyone has any objections, please let me know. >> >> =============== >> >> commit 4a705fef986231a3e7a6b1a6d3c37025f021f49f upstream. >> >> There's a race between fork() and hugepage migration, as a result we try >> to "dereference" a swap entry as a normal pte, causing kernel panic. >> The cause of the problem is that copy_hugetlb_page_range() can't handle >> "swap entry" family (migration entry and hwpoisoned entry) so let's fix >> it. >> >> [akpm@linux-foundation.org: coding-style fixes] >> Signed-off-by: Naoya Horiguchi >> Acked-by: Hugh Dickins >> Cc: Christoph Lameter >> Signed-off-by: Andrew Morton >> Signed-off-by: Linus Torvalds >> Signed-off-by: Jiri Slaby > > Please drop this one for now: other -stables have carried it, but it > was found yesterday to contain a bug of its own, arguably worse than > what it's fixing. Naoya-san has done the fix for that, it's in mmotm > and should make its way to Linus probably next week: so please hold > this back until that can join it - thanks. Thanks, I dropped it later on Fri already after Guillaume informed me about this. -- js suse labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/