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 23DFFC433EF for ; Tue, 17 May 2022 18:18:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244889AbiEQSS3 (ORCPT ); Tue, 17 May 2022 14:18:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351939AbiEQSS3 (ORCPT ); Tue, 17 May 2022 14:18:29 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 699FB506F7; Tue, 17 May 2022 11:18:28 -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 EDC8F6154E; Tue, 17 May 2022 18:18:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 293B7C385B8; Tue, 17 May 2022 18:18:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652811507; bh=2LCmXWONhKrPy7V/HFUdgxZKavcQYloErhSK6XQD1tI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=okiCUjDmTLzdZyWXfepJpPbdx1gK30/Wqd0sXKdy6X/Naod/JEIiHeCGOBbjFrYj+ rHbGIXINnXvx3NrlrP1LntVd2nEQZJJT3ivOs6NnPOmt7eSX9mfARpztaHWBN7pJSA LxYGDl3HSnAjiNZTZWlyivpAxw4W8jarJC1mFpvMJYEYmcMrk2KzUFHG8eNIDab32j bfTTchj1nBXJxXtaL7H6oV/kL+e31N18OP4nb22uj26EUjgVX4frSybpvStSl9VUw1 PrSd3ULmI+V+M83nEXjta4iZZeql8zQue2Uze4r87DZzNtxUOCurCcRd0Kt31cmPsH d30YIf/xo/9dQ== Date: Tue, 17 May 2022 11:18:25 -0700 From: Jaegeuk Kim To: Chao Yu Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Ming Yan , Chao Yu Subject: Re: [PATCH v4] f2fs: fix to do sanity check for inline inode Message-ID: References: <20220517033120.3564912-1-chao@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220517033120.3564912-1-chao@kernel.org> Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 05/17, Chao Yu wrote: > 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 Can we do like this? --- fs/f2fs/f2fs.h | 1 + fs/f2fs/inline.c | 30 +++++++++++++++++++++++++----- fs/f2fs/inode.c | 3 +-- 3 files changed, 27 insertions(+), 7 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e9e32bc814df..000468bf06ca 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4019,6 +4019,7 @@ extern struct kmem_cache *f2fs_inode_entry_slab; * inline.c */ bool f2fs_may_inline_data(struct inode *inode); +bool f2fs_sanity_check_inline_data(struct inode *inode); 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, diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c index a578bf83b803..daf8c0e0a6b6 100644 --- a/fs/f2fs/inline.c +++ b/fs/f2fs/inline.c @@ -14,21 +14,41 @@ #include "node.h" #include -bool f2fs_may_inline_data(struct inode *inode) +static bool support_inline_data(struct inode *inode) { if (f2fs_is_atomic_file(inode)) return false; - if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode)) return false; - if (i_size_read(inode) > MAX_INLINE_DATA(inode)) return false; + return true; +} - if (f2fs_post_read_required(inode)) +bool f2fs_may_inline_data(struct inode *inode) +{ + if (!support_inline_data(inode)) return false; - return true; + return !(f2fs_encrypted_file(inode) || fsverity_active(inode) || + f2fs_compressed_file(inode)); +} + +bool f2fs_sanity_check_inline_data(struct inode *inode) +{ + if (!f2fs_has_inline_data(inode)) + return false; + + if (!support_inline_data(inode)) + return true; + + /* + * used by sanity_check_inode(), when disk layout fields has not + * been synchronized to inmem fields. + */ + return (S_ISREG(inode->i_mode) && + (file_is_encrypt(inode) || file_is_verity(inode) || + (F2FS_I(inode)->i_flags & F2FS_COMPR_FL))); } bool f2fs_may_inline_dentry(struct inode *inode) diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 2fce8fa0dac8..938961a9084e 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_sanity_check_inline_data(inode)) { 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); -- 2.36.0.550.gb090851708-goog