From patchwork Mon Dec 7 22:53:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 7792671 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 50873BEEE1 for ; Mon, 7 Dec 2015 22:54:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 89F692056E for ; Mon, 7 Dec 2015 22:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B075B20573 for ; Mon, 7 Dec 2015 22:54:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756665AbbLGWxh (ORCPT ); Mon, 7 Dec 2015 17:53:37 -0500 Received: from mail.kernel.org ([198.145.29.136]:53732 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756331AbbLGWxf (ORCPT ); Mon, 7 Dec 2015 17:53:35 -0500 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6135D20574; Mon, 7 Dec 2015 22:53:34 +0000 (UTC) Received: from localhost (107-1-141-74-ip-static.hfc.comcastbusiness.net [107.1.141.74]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AC56F2057F; Mon, 7 Dec 2015 22:53:33 +0000 (UTC) From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 3/3] f2fs: use lock_buffer when changing superblock Date: Mon, 7 Dec 2015 14:53:25 -0800 Message-Id: <1449528805-89661-3-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.4.9 (Apple Git-60) In-Reply-To: <1449528805-89661-1-git-send-email-jaegeuk@kernel.org> References: <1449528805-89661-1-git-send-email-jaegeuk@kernel.org> X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When modifying sb contents, we need to use lock its buffer. Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index a018ed3..a16dfe9 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1591,7 +1591,9 @@ static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) return err; /* update superblock with uuid */ + lock_buffer(sbi->raw_super_buf); generate_random_uuid(sbi->raw_super->encrypt_pw_salt); + unlock_buffer(sbi->raw_super_buf); err = f2fs_commit_super(sbi, false);