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[2620:137:e000::1:20]) by mx.google.com with ESMTP id lx10-20020a17090b4b0a00b00205da45d8a5si18530928pjb.124.2023.03.07.19.23.11; Tue, 07 Mar 2023 19:23:27 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229755AbjCHDDk (ORCPT + 99 others); Tue, 7 Mar 2023 22:03:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229483AbjCHDDi (ORCPT ); Tue, 7 Mar 2023 22:03:38 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 513C5584B4; Tue, 7 Mar 2023 19:03:37 -0800 (PST) Received: from kwepemm600013.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4PWcWg17kyznWd1; Wed, 8 Mar 2023 11:00:47 +0800 (CST) Received: from huawei.com (10.175.127.227) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Wed, 8 Mar 2023 11:03:34 +0800 From: Zhihao Cheng To: , , CC: , , , Subject: [PATCH] ext4: Fix WANRON caused by unconsistent boot loader inode's i_size and i_disksize Date: Wed, 8 Mar 2023 11:26:43 +0800 Message-ID: <20230308032643.641113-1-chengzhihao1@huawei.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemm600013.china.huawei.com (7.193.23.68) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759768275653680528?= X-GMAIL-MSGID: =?utf-8?q?1759768275653680528?= Using corrupted ext4 image(non-zero i_size for boot loader inode) could trigger WARNON 'i_size_read(inode) < EXT4_I(inode)->i_disksize' in ext4_handle_inode_extension(): WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319 CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa RIP: 0010:ext4_file_write_iter+0xbc7/0xd10 Call Trace: vfs_write+0x3b1/0x5c0 ksys_write+0x77/0x160 __x64_sys_write+0x22/0x30 do_syscall_64+0x39/0x80 Reproducer (See Link): 1. mount corrupted ext4 image with non-zero i_size for boot loader inode 2. ioctl(fd, EXT4_IOC_SWAP_BOOT) 3. write(fd) // O_DIRECT Fix it by setting i_disksize while first loading boot loader inode. Link: https://bugzilla.kernel.org/show_bug.cgi?id=217159 Cc: Signed-off-by: Zhihao Cheng --- fs/ext4/ioctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 12435d61f09e..f9a430152063 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -431,6 +431,7 @@ static long swap_inode_boot_loader(struct super_block *sb, ei_bl->i_flags = 0; inode_set_iversion(inode_bl, 1); i_size_write(inode_bl, 0); + EXT4_I(inode_bl)->i_disksize = inode_bl->i_size; inode_bl->i_mode = S_IFREG; if (ext4_has_feature_extents(sb)) { ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);