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 X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A0FCC43441 for ; Sun, 11 Nov 2018 23:27:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3E19920869 for ; Sun, 11 Nov 2018 23:27:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="i8CQuCqr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E19920869 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389069AbeKLJSK (ORCPT ); Mon, 12 Nov 2018 04:18:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:44954 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388859AbeKLIUe (ORCPT ); Mon, 12 Nov 2018 03:20:34 -0500 Received: from localhost (unknown [206.108.79.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 53034223C8; Sun, 11 Nov 2018 22:30:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541975438; bh=W0ghDE8K82EeFaWSIm6Ra6/QSkAFZ2q5PdadjItSqYo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i8CQuCqrlqdfbed2fUYb9lDNU1pFsX2KHv7sZL6GDna3+Bt9n/Kj1EmYRmtmZk5kh t2BhF1q/oDWEuZ6GQH7CHcQvv1hbdd9CoxDLjGqOEtQ005rfP/y+I/AbadiaPpAL4i gdv6v/itaZvTu8Jyrmjdi8w7GZ4CXQjMI3aQl9hA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chao Yu , Jaegeuk Kim Subject: [PATCH 4.18 190/350] f2fs: fix to account IO correctly Date: Sun, 11 Nov 2018 14:20:54 -0800 Message-Id: <20181111221715.972812406@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181111221707.043394111@linuxfoundation.org> References: <20181111221707.043394111@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chao Yu commit 4c58ed076875f36dae0f240da1e25e99e5d4afb8 upstream. Below race can cause reversed reference on dirty count, fix it by relocating __submit_bio() and inc_page_count(). Thread A Thread B - f2fs_inplace_write_data - f2fs_submit_page_bio - __submit_bio - f2fs_write_end_io - dec_page_count - inc_page_count Cc: Fixes: d1b3e72d5490 ("f2fs: submit bio of in-place-update pages") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/data.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -460,10 +460,10 @@ int f2fs_submit_page_bio(struct f2fs_io_ bio_set_op_attrs(bio, fio->op, fio->op_flags); - __submit_bio(fio->sbi, bio, fio->type); - if (!is_read_io(fio->op)) inc_page_count(fio->sbi, WB_DATA_TYPE(fio->page)); + + __submit_bio(fio->sbi, bio, fio->type); return 0; }