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 E67A1C433EF for ; Mon, 24 Jan 2022 18:55:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343727AbiAXSzZ (ORCPT ); Mon, 24 Jan 2022 13:55:25 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:52078 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343982AbiAXSwy (ORCPT ); Mon, 24 Jan 2022 13:52:54 -0500 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 dfw.source.kernel.org (Postfix) with ESMTPS id EB390614BE; Mon, 24 Jan 2022 18:52:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2613C340E5; Mon, 24 Jan 2022 18:52:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643050373; bh=W46B476feYqGoB0BzzWIPhXASw9qeqBJiY3JXo5Z8qE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UUzn2C5cBpCuTGlw2zb2KlsqeQ/2uu2HPOaZzIbLKmmHdt1Oc15c7TVQGZo63n2n2 0vdfp4hth7/9f30os2CV6OgNuCjySd36hC2C/lqD0ERP1sAdQ6zziq+YCuMx+vSVTe nWM6qo1hFPb7y/LobVPXuRTMrT0ulm3MRv2T4RGE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jeroen van Wolffelaar , =?UTF-8?q?Lu=C3=ADs=20Henriques?= , Theodore Tso , stable@kernel.org Subject: [PATCH 4.4 098/114] ext4: set csum seed in tmp inode while migrating to extents Date: Mon, 24 Jan 2022 19:43:13 +0100 Message-Id: <20220124183930.140510144@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183927.095545464@linuxfoundation.org> References: <20220124183927.095545464@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: Luís Henriques commit e81c9302a6c3c008f5c30beb73b38adb0170ff2d upstream. When migrating to extents, the temporary inode will have it's own checksum seed. This means that, when swapping the inodes data, the inode checksums will be incorrect. This can be fixed by recalculating the extents checksums again. Or simply by copying the seed into the temporary inode. Link: https://bugzilla.kernel.org/show_bug.cgi?id=213357 Reported-by: Jeroen van Wolffelaar Signed-off-by: Luís Henriques Link: https://lore.kernel.org/r/20211214175058.19511-1-lhenriques@suse.de Signed-off-by: Theodore Ts'o Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman --- fs/ext4/migrate.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -481,6 +481,17 @@ int ext4_ext_migrate(struct inode *inode ext4_journal_stop(handle); return retval; } + /* + * Use the correct seed for checksum (i.e. the seed from 'inode'). This + * is so that the metadata blocks will have the correct checksum after + * the migration. + * + * Note however that, if a crash occurs during the migration process, + * the recovery process is broken because the tmp_inode checksums will + * be wrong and the orphans cleanup will fail. + */ + ei = EXT4_I(inode); + EXT4_I(tmp_inode)->i_csum_seed = ei->i_csum_seed; i_size_write(tmp_inode, i_size_read(inode)); /* * Set the i_nlink to zero so it will be deleted later @@ -524,7 +535,6 @@ int ext4_ext_migrate(struct inode *inode goto out; } - ei = EXT4_I(inode); i_data = ei->i_data; memset(&lb, 0, sizeof(lb));