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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 6155EC47062 for ; Mon, 10 May 2021 12:02:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 426CC613EE for ; Mon, 10 May 2021 12:02:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244893AbhEJMC2 (ORCPT ); Mon, 10 May 2021 08:02:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:46148 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236157AbhEJLHk (ORCPT ); Mon, 10 May 2021 07:07:40 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EC3FF61934; Mon, 10 May 2021 10:58:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620644313; bh=IRG8d4vowIAaGqZfnkozIZe9SalBzyrS24k59EHczvo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SFQp+v+DjT3QLjOz+nIoSu0ovXuUR1b3rEa1iHfqh5KXK5ZIiqRMGLF7HfdhmOaW+ uUFuZ8lFiSnLxCQ5knnmRRI4nJaDJ7htcZPfkltb4CIMDL6dBuMghtVCesL2aRBdwB 4k5weiusxQA8VFVF9JbP7BCW3qeB4Luc0jrLX9C8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Gao Xiang Subject: [PATCH 5.12 030/384] erofs: add unsupported inode i_format check Date: Mon, 10 May 2021 12:16:59 +0200 Message-Id: <20210510102015.856471910@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102014.849075526@linuxfoundation.org> References: <20210510102014.849075526@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: linux-kernel@vger.kernel.org From: Gao Xiang commit 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 upstream. If any unknown i_format fields are set (may be of some new incompat inode features), mark such inode as unsupported. Just in case of any new incompat i_format fields added in the future. Link: https://lore.kernel.org/r/20210329003614.6583-1-hsiangkao@aol.com Fixes: 431339ba9042 ("staging: erofs: add inode operations") Cc: # 4.19+ Signed-off-by: Gao Xiang Signed-off-by: Greg Kroah-Hartman --- fs/erofs/erofs_fs.h | 3 +++ fs/erofs/inode.c | 7 +++++++ 2 files changed, 10 insertions(+) --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -75,6 +75,9 @@ static inline bool erofs_inode_is_data_c #define EROFS_I_VERSION_BIT 0 #define EROFS_I_DATALAYOUT_BIT 1 +#define EROFS_I_ALL \ + ((1 << (EROFS_I_DATALAYOUT_BIT + EROFS_I_DATALAYOUT_BITS)) - 1) + /* 32-byte reduced form of an ondisk inode */ struct erofs_inode_compact { __le16 i_format; /* inode format hints */ --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -44,6 +44,13 @@ static struct page *erofs_read_inode(str dic = page_address(page) + *ofs; ifmt = le16_to_cpu(dic->i_format); + if (ifmt & ~EROFS_I_ALL) { + erofs_err(inode->i_sb, "unsupported i_format %u of nid %llu", + ifmt, vi->nid); + err = -EOPNOTSUPP; + goto err_out; + } + vi->datalayout = erofs_inode_datalayout(ifmt); if (vi->datalayout >= EROFS_INODE_DATALAYOUT_MAX) { erofs_err(inode->i_sb, "unsupported datalayout %u of nid %llu",