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 8F7EDC433F5 for ; Tue, 26 Apr 2022 08:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344794AbiDZIfL (ORCPT ); Tue, 26 Apr 2022 04:35:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345517AbiDZIel (ORCPT ); Tue, 26 Apr 2022 04:34:41 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32EF578928; Tue, 26 Apr 2022 01:27:34 -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 ams.source.kernel.org (Postfix) with ESMTPS id C587EB81A2F; Tue, 26 Apr 2022 08:27:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3394BC385A0; Tue, 26 Apr 2022 08:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961651; bh=Wgd36B5rjC5/ZHNoZuT+EVys1kOLNjl1nZr2tmHVyXc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IyzQG7MDEsrk00dbVINB6OWteuS2qv0XG8cFthcLoJi7NK7NcKYXiwV1VPVqAp5u7 tciKl/6QpYxTRW4e3WsP4FdJf7kCGT9/7ekdJ3I/a0mhpemZRzB4ZsYw9nhGfvfBrN j9HwIp8Uk070iUSqKP8EKfOfUUs81pWIN4gge72s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, stable@kernel.org, Ye Bin , Jan Kara , Theodore Tso Subject: [PATCH 4.19 39/53] ext4: fix symlink file size not match to file content Date: Tue, 26 Apr 2022 10:21:19 +0200 Message-Id: <20220426081736.794937216@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081735.651926456@linuxfoundation.org> References: <20220426081735.651926456@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ye Bin commit a2b0b205d125f27cddfb4f7280e39affdaf46686 upstream. We got issue as follows: [home]# fsck.ext4 -fn ram0yb e2fsck 1.45.6 (20-Mar-2020) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Symlink /p3/d14/d1a/l3d (inode #3494) is invalid. Clear? no Entry 'l3d' in /p3/d14/d1a (3383) has an incorrect filetype (was 7, should be 0). Fix? no As the symlink file size does not match the file content. If the writeback of the symlink data block failed, ext4_finish_bio() handles the end of IO. However this function fails to mark the buffer with BH_write_io_error and so when unmount does journal checkpoint it cannot detect the writeback error and will cleanup the journal. Thus we've lost the correct data in the journal area. To solve this issue, mark the buffer as BH_write_io_error in ext4_finish_bio(). Cc: stable@kernel.org Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220321144438.201685-1-yebin10@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/page-io.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -105,8 +105,10 @@ static void ext4_finish_bio(struct bio * continue; } clear_buffer_async_write(bh); - if (bio->bi_status) + if (bio->bi_status) { + set_buffer_write_io_error(bh); buffer_io_error(bh); + } } while ((bh = bh->b_this_page) != head); bit_spin_unlock(BH_Uptodate_Lock, &head->b_state); local_irq_restore(flags);