From patchwork Mon Jan 4 15:57:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 356715 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 6F7C7C433E9 for ; Mon, 4 Jan 2021 16:14:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E478224DE for ; Mon, 4 Jan 2021 16:14:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727921AbhADP7a (ORCPT ); Mon, 4 Jan 2021 10:59:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:36560 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727910AbhADP7a (ORCPT ); Mon, 4 Jan 2021 10:59:30 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1B7182250E; Mon, 4 Jan 2021 15:58:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609775908; bh=GexB/GbK1/PeJlEzVineB82tfs71ffHOwtKODHDPsU8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=muxQJgOTNbd+UZ7RVGneiRzpFeO6mnVPXyXc/95NhRye98NraSwwqU0NYr+p2gPeI 9dq+5of8Dm+dBqV7bm2AYgyeUWZ/4W6lhADzoYFjwK9Nl+dtLeWY1uDWkXToGuDBk1 6+Dxs+A6gVa7ZE+xdm+WFDbs5E9kenhKaXimgEX8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jan Kara , Andreas Dilger , stable@kernel.org, Theodore Tso , Sasha Levin Subject: [PATCH 4.19 07/35] ext4: dont remount read-only with errors=continue on reboot Date: Mon, 4 Jan 2021 16:57:10 +0100 Message-Id: <20210104155703.748866498@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210104155703.375788488@linuxfoundation.org> References: <20210104155703.375788488@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jan Kara [ Upstream commit b08070eca9e247f60ab39d79b2c25d274750441f ] ext4_handle_error() with errors=continue mount option can accidentally remount the filesystem read-only when the system is rebooting. Fix that. Fixes: 1dc1097ff60e ("ext4: avoid panic during forced reboot") Signed-off-by: Jan Kara Reviewed-by: Andreas Dilger Cc: stable@kernel.org Link: https://lore.kernel.org/r/20201127113405.26867-2-jack@suse.cz Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/super.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ee96f504ed782..e9e9f09f5370d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -454,19 +454,17 @@ static bool system_going_down(void) static void ext4_handle_error(struct super_block *sb) { + journal_t *journal = EXT4_SB(sb)->s_journal; + if (test_opt(sb, WARN_ON_ERROR)) WARN_ON_ONCE(1); - if (sb_rdonly(sb)) + if (sb_rdonly(sb) || test_opt(sb, ERRORS_CONT)) return; - if (!test_opt(sb, ERRORS_CONT)) { - journal_t *journal = EXT4_SB(sb)->s_journal; - - EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; - if (journal) - jbd2_journal_abort(journal, -EIO); - } + EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; + if (journal) + jbd2_journal_abort(journal, -EIO); /* * We force ERRORS_RO behavior when system is rebooting. Otherwise we * could panic during 'reboot -f' as the underlying device got already