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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DB33C6FA82 for ; Thu, 8 Sep 2022 21:00:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229907AbiIHVAV (ORCPT ); Thu, 8 Sep 2022 17:00:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229905AbiIHVAS (ORCPT ); Thu, 8 Sep 2022 17:00:18 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0C138048C; Thu, 8 Sep 2022 14:00:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id C2566CE20F4; Thu, 8 Sep 2022 21:00:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F7DCC433D7; Thu, 8 Sep 2022 21:00:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1662670810; bh=14wgeL8T2xIyd7x1twsfoGhvJoQDSKZ48Nxm+eTUIPI=; h=Date:To:From:Subject:From; b=SdoH+cl8uxPLRfIR2QXL5MIHgxLjzORMJAazpDipssbJDzMijeqOmbumcuBb5H985 V/3lzUuUgNI1BXgv2uuLe616p0rvi6Tpe8ypOcOMIalgdWLdIcWCoNHaTYQuF5ddPk GQma4LQ5totk+XJbyUBr6GdcaetgY2Syf1iCKOmQ= Date: Thu, 08 Sep 2022 14:00:09 -0700 To: mm-commits@vger.kernel.org, stable@vger.kernel.org, shy828301@gmail.com, hantianshuo@iie.ac.cn, minchan@kernel.org, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-fix-madivse_pageout-mishandling-on-non-lru-page.patch added to mm-hotfixes-unstable branch Message-Id: <20220908210010.1F7DCC433D7@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: fix madivse_pageout mishandling on non-LRU page has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-fix-madivse_pageout-mishandling-on-non-lru-page.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-fix-madivse_pageout-mishandling-on-non-lru-page.patch This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Minchan Kim Subject: mm: fix madivse_pageout mishandling on non-LRU page Date: Thu, 8 Sep 2022 08:12:04 -0700 MADV_PAGEOUT tries to isolate non-LRU pages and gets a warning from isolate_lru_page below. Fix it by checking PageLRU in advance. ------------[ cut here ]------------ trying to isolate tail page WARNING: CPU: 0 PID: 6175 at mm/folio-compat.c:158 isolate_lru_page+0x130/0x140 Modules linked in: CPU: 0 PID: 6175 Comm: syz-executor.0 Not tainted 5.18.12 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:isolate_lru_page+0x130/0x140 Link: https://lore.kernel.org/linux-mm/485f8c33.2471b.182d5726afb.Coremail.hantianshuo@iie.ac.cn/ Link: https://lkml.kernel.org/r/20220908151204.762596-1-minchan@kernel.org Fixes: 1a4e58cce84e ("mm: introduce MADV_PAGEOUT") Signed-off-by: Minchan Kim Reported-by: 韩天ç`• Suggested-by: Yang Shi Acked-by: Yang Shi Cc: Signed-off-by: Andrew Morton --- mm/madvise.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/mm/madvise.c~mm-fix-madivse_pageout-mishandling-on-non-lru-page +++ a/mm/madvise.c @@ -451,8 +451,11 @@ regular_page: continue; } - /* Do not interfere with other mappings of this page */ - if (page_mapcount(page) != 1) + /* + * Do not interfere with other mappings of this page and + * non-LRU page. + */ + if (!PageLRU(page) || page_mapcount(page) != 1) continue; VM_BUG_ON_PAGE(PageTransCompound(page), page); _ Patches currently in -mm which might be from minchan@kernel.org are mm-fix-madivse_pageout-mishandling-on-non-lru-page.patch