From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF6AF3B8412; Tue, 21 Jul 2026 21:54:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784670850; cv=none; b=JQxSa65OmpNr8woyPOyBz8AvnA1gkYQWzx9ZC7h4kdL2zIVBwamW2JKaifsbp3ali7JUtNWbQT7OhN03+qEGMmLMRVTxbkkHlfPYG2tYIrXj51Sta2RZU8IM5txch6W1ViWALZQDlZ6nUmO/GYTHb1jTgufGjRinnwfzDicqIPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784670850; c=relaxed/simple; bh=6AGYB3IjiYiCdYxJ2nOVroN6ZcLT5jjIpiNJFTDIorI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XQXzRBKIA1aRHidk4M3jzmI625TO/yMi2A/inLYTU21BIju4BIHrPyKMzxfsz9qziR2Pw2aB/wnb80Nh9ZXD3yD+SeRKjZXxjNoAcvQ4rDEkQC7n0IrYw5OlhG2tW2yXhjXTdXvnk9AFCd6InMZyaNpfxMYGL51c2cEj39YMGi0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=g8fwdssX; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="g8fwdssX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3026F1F000E9; Tue, 21 Jul 2026 21:54:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784670849; bh=tzlxJqf+NY/iyvqu15IyowKV5xKURDcUekn9UUvahA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=g8fwdssXgD8K2ACbRwcAIClbRCGthAicj9dXds8B8ngDdlE2fknoKo5K2twrrDTRo hDOHP5AmqARyrDcB/CJdCwM1/r96l2ckvw9Ks+sOSpKdZ0flVOho46nY1FOMcQuey/ zWzMxyzZ3alCZQ1dZmO75omyS12PrHC6qfYi32EM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 5.15 024/843] f2fs: fix to detect corrupted meta ino Date: Tue, 21 Jul 2026 17:14:19 +0200 Message-ID: <20260721152406.507622599@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chao Yu [ Upstream commit fcc2d8cc96b2f6141bbbe5b1e8953db990794b44 ] It is possible that ino of dirent or orphan inode is corrupted in a fuzzed image, occasionally, if corrupted ino is equal to meta ino: meta_ino, node_ino or compress_ino, caller of f2fs_iget() from below call paths will get meta inode directly, it's not allowed, let's add sanity check to detect such cases. case #1 - recover_dentry - __f2fs_find_entry - f2fs_iget_retry case #2 - recover_orphan_inode - f2fs_iget_retry Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Stable-dep-of: 5073c66a96a9 ("f2fs: validate compress cache inode only when enabled") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/inode.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -496,6 +496,12 @@ static int do_read_inode(struct inode *i return 0; } +static bool is_meta_ino(struct f2fs_sb_info *sbi, unsigned int ino) +{ + return ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi) || + ino == F2FS_COMPRESS_INO(sbi); +} + struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) { struct f2fs_sb_info *sbi = F2FS_SB(sb); @@ -507,16 +513,21 @@ struct inode *f2fs_iget(struct super_blo return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) { + if (is_meta_ino(sbi, ino)) { + f2fs_err(sbi, "inaccessible inode: %lu, run fsck to repair", ino); + set_sbi_flag(sbi, SBI_NEED_FSCK); + ret = -EFSCORRUPTED; + trace_f2fs_iget_exit(inode, ret); + iput(inode); + return ERR_PTR(ret); + } + trace_f2fs_iget(inode); return inode; } - if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) - goto make_now; -#ifdef CONFIG_F2FS_FS_COMPRESSION - if (ino == F2FS_COMPRESS_INO(sbi)) + if (is_meta_ino(sbi, ino)) goto make_now; -#endif ret = do_read_inode(inode); if (ret)