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 825D4C433EF for ; Tue, 17 May 2022 03:31:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233370AbiEQDbd (ORCPT ); Mon, 16 May 2022 23:31:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233714AbiEQDba (ORCPT ); Mon, 16 May 2022 23:31:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 556EC37BE9; Mon, 16 May 2022 20:31:28 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 60F9461475; Tue, 17 May 2022 03:31:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82F31C34115; Tue, 17 May 2022 03:31:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652758287; bh=Dw8tFsGPNJpxwowTVAncpYfXnADMbsZZPIOSovGKhzQ=; h=From:To:Cc:Subject:Date:From; b=Khe0QJphBHv/ItTDiC0/Nntn2UhwH0EarPo+c+kYatw70l1PfANB5IsP9UWHhSm5L pgKoKpUe9P1Ge/LA9Y0U0Mq687i4eqZw+/DlN48z9HSrJaeVXAE/miXryOa2jSFLCT 475WBoVHfvnNtoVb1iCg4ElJ1OpWiVzl/tynN2b+n31GWHDW1xB8rjxn01hmXq54r7 E3S8yDwC/Oo5ZuC9JV1+ta4s7P3UalHVfqoVfL2+PqdC+sa3XYn/FS1MvYmaJhq8a8 Pet21wpbDbmtrhE6fXcIauc3JgCPJuu8q86MISR0MOPdokjmo9Xr2LgXGS0LT2nC5e v68Na99U742FA== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu , stable@vger.kernel.org, Ming Yan , Chao Yu Subject: [PATCH v4] f2fs: fix to do sanity check for inline inode Date: Tue, 17 May 2022 11:31:20 +0800 Message-Id: <20220517033120.3564912-1-chao@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org Yanming reported a kernel bug in Bugzilla kernel [1], which can be reproduced. The bug message is: The kernel message is shown below: kernel BUG at fs/inode.c:611! Call Trace: evict+0x282/0x4e0 __dentry_kill+0x2b2/0x4d0 dput+0x2dd/0x720 do_renameat2+0x596/0x970 __x64_sys_rename+0x78/0x90 do_syscall_64+0x3b/0x90 [1] https://bugzilla.kernel.org/show_bug.cgi?id=215895 The bug is due to fuzzed inode has both inline_data and encrypted flags. During f2fs_evict_inode(), as the inode was deleted by rename(), it will cause inline data conversion due to conflicting flags. The page cache will be polluted and the panic will be triggered in clear_inode(). Try fixing the bug by doing more sanity checks for inline data inode in sanity_check_inode(). Cc: stable@vger.kernel.org Reported-by: Ming Yan Signed-off-by: Chao Yu --- v4: - introduce and use f2fs_post_read_required_ondisk() only for sanity_check_inode(). fs/f2fs/f2fs.h | 15 ++++++++++++++- fs/f2fs/file.c | 2 +- fs/f2fs/inline.c | 11 ++++++++--- fs/f2fs/inode.c | 3 +-- fs/f2fs/namei.c | 2 +- 5 files changed, 25 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 7faf230f101f..65442ab03d32 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4039,7 +4039,7 @@ extern struct kmem_cache *f2fs_inode_entry_slab; /* * inline.c */ -bool f2fs_may_inline_data(struct inode *inode); +bool f2fs_may_inline_data(struct inode *inode, bool sanity_check); bool f2fs_may_inline_dentry(struct inode *inode); void f2fs_do_read_inline_data(struct page *page, struct page *ipage); void f2fs_truncate_inline_inode(struct inode *inode, @@ -4141,6 +4141,19 @@ static inline void f2fs_set_encrypted_inode(struct inode *inode) #endif } +static inline bool f2fs_post_read_required_ondisk(struct inode *inode) +{ + /* + * used by sanity_check_inode(), when disk layout fields has not + * been synchronized to inmem fields. + */ + if (S_ISREG(inode->i_mode) && (file_is_encrypt(inode) || + F2FS_I(inode)->i_flags & F2FS_COMPR_FL || + file_is_verity(inode))) + return true; + + return false; +} /* * Returns true if the reads of the inode's data need to undergo some * postprocessing step, like decryption or authenticity verification. diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 0a554730d2c4..73ba1c6dceaa 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -796,7 +796,7 @@ int f2fs_truncate(struct inode *inode) return err; /* we should check inline_data size */ - if (!f2fs_may_inline_data(inode)) { + if (!f2fs_may_inline_data(inode, false)) { err = f2fs_convert_inline_inode(inode); if (err) return err; diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c index a578bf83b803..331ecd8af80c 100644 --- a/fs/f2fs/inline.c +++ b/fs/f2fs/inline.c @@ -14,7 +14,7 @@ #include "node.h" #include -bool f2fs_may_inline_data(struct inode *inode) +bool f2fs_may_inline_data(struct inode *inode, bool sanity_check) { if (f2fs_is_atomic_file(inode)) return false; @@ -25,8 +25,13 @@ bool f2fs_may_inline_data(struct inode *inode) if (i_size_read(inode) > MAX_INLINE_DATA(inode)) return false; - if (f2fs_post_read_required(inode)) - return false; + if (sanity_check) { + if (f2fs_post_read_required_ondisk(inode)) + return false; + } else { + if (f2fs_post_read_required(inode)) + return false; + } return true; } diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 2fce8fa0dac8..3384100dde0b 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -276,8 +276,7 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page) } } - if (f2fs_has_inline_data(inode) && - (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))) { + if (f2fs_has_inline_data(inode) && !f2fs_may_inline_data(inode, true)) { set_sbi_flag(sbi, SBI_NEED_FSCK); f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix", __func__, inode->i_ino, inode->i_mode); diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index c549acb52ac4..514088f707ed 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -89,7 +89,7 @@ static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns, if (test_opt(sbi, INLINE_XATTR)) set_inode_flag(inode, FI_INLINE_XATTR); - if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) + if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode, false)) set_inode_flag(inode, FI_INLINE_DATA); if (f2fs_may_inline_dentry(inode)) set_inode_flag(inode, FI_INLINE_DENTRY); -- 2.25.1