From patchwork Tue Dec 22 01:16:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Yu X-Patchwork-Id: 346957 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D1FF5C433E0 for ; Tue, 22 Dec 2020 01:20:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9664622B3B for ; Tue, 22 Dec 2020 01:20:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725820AbgLVBU1 (ORCPT ); Mon, 21 Dec 2020 20:20:27 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:9908 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725780AbgLVBU1 (ORCPT ); Mon, 21 Dec 2020 20:20:27 -0500 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4D0JQ31hdDz7JFd; Tue, 22 Dec 2020 09:18:51 +0800 (CST) Received: from szvp000203569.huawei.com (10.120.216.130) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.498.0; Tue, 22 Dec 2020 09:16:48 +0800 From: Chao Yu To: , CC: , , , , kitestramuort Subject: [PATCH 5.10.y] f2fs: fix to seek incorrect data offset in inline data file Date: Tue, 22 Dec 2020 09:16:34 +0800 Message-ID: <20201222011634.124180-1-yuchao0@huawei.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org As kitestramuort reported: F2FS-fs (nvme0n1p4): access invalid blkaddr:1598541474 [ 25.725898] ------------[ cut here ]------------ [ 25.725903] WARNING: CPU: 6 PID: 2018 at f2fs_is_valid_blkaddr+0x23a/0x250 [ 25.725923] Call Trace: [ 25.725927] ? f2fs_llseek+0x204/0x620 [ 25.725929] ? ovl_copy_up_data+0x14f/0x200 [ 25.725931] ? ovl_copy_up_inode+0x174/0x1e0 [ 25.725933] ? ovl_copy_up_one+0xa22/0xdf0 [ 25.725936] ? ovl_copy_up_flags+0xa6/0xf0 [ 25.725938] ? ovl_aio_cleanup_handler+0xd0/0xd0 [ 25.725939] ? ovl_maybe_copy_up+0x86/0xa0 [ 25.725941] ? ovl_open+0x22/0x80 [ 25.725943] ? do_dentry_open+0x136/0x350 [ 25.725945] ? path_openat+0xb7e/0xf40 [ 25.725947] ? __check_sticky+0x40/0x40 [ 25.725948] ? do_filp_open+0x70/0x100 [ 25.725950] ? __check_sticky+0x40/0x40 [ 25.725951] ? __check_sticky+0x40/0x40 [ 25.725953] ? __x64_sys_openat+0x1db/0x2c0 [ 25.725955] ? do_syscall_64+0x2d/0x40 [ 25.725957] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 llseek() reports invalid block address access, the root cause is if file has inline data, f2fs_seek_block() will access inline data regard as block address index in inode block, which should be wrong, fix it. Fixes: 788e96d1d3994 ("f2fs: code cleanup by removing unnecessary check") Fixes: 267378d4de69 ("f2fs: introduce f2fs_seek_block to support SEEK_{DATA, HOLE} in llseek") Cc: stable # 3.16+ Reported-by: kitestramuort Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- This will cause boot failure in f2fs image, which was reported in gentoo community, I'd like to fix them in stable kernel 5.10 first as request in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=210825 fs/f2fs/file.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index ee861c6d9ff0..fe39e591e5b4 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -412,9 +412,14 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) goto fail; /* handle inline data case */ - if (f2fs_has_inline_data(inode) && whence == SEEK_HOLE) { - data_ofs = isize; - goto found; + if (f2fs_has_inline_data(inode)) { + if (whence == SEEK_HOLE) { + data_ofs = isize; + goto found; + } else if (whence == SEEK_DATA) { + data_ofs = offset; + goto found; + } } pgofs = (pgoff_t)(offset >> PAGE_SHIFT);