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 E0D9DC4332F for ; Tue, 18 Oct 2022 00:15:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231695AbiJRAPH (ORCPT ); Mon, 17 Oct 2022 20:15:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231178AbiJRANq (ORCPT ); Mon, 17 Oct 2022 20:13:46 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7DBE89949; Mon, 17 Oct 2022 17:10:22 -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 6343B61329; Tue, 18 Oct 2022 00:10:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15856C43143; Tue, 18 Oct 2022 00:10:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666051821; bh=1ZYxHUyU9NpGZtKaFDyP0j06ZoEkHo2aD97zSqyG0gU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fmojT7R+ukzv97BLMmoabXJoDXShQvOclPgBAnEZZuvQYRGj8yNtncj4tTSWzVj8c AFhGrfdzVhbyTZgCb3mFhCz2/65h4tbU2yhDMGBYRoBV9sNrDS3rpLnlgkt6jRFJvJ N2nAIiiQtw/LgUmWAzjG0I1mZIrPZcXSLZHA6Ho6xm35SCZjhXLnVgKX21cuV41w3n yxsVZ/K6NFMe060qr/PtsM+0k0ZgNXNBRxth/BX78GoH4QKD2TC0BunV0Z6o4nNxy8 HslKmdg86ksTJh4JZO++heDk59Z2LjNsP8xq2MLGq1027eDZ0uovlSZy6ZUaUuJJcH fgOS2K8bH2pNA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chao Yu , Jaegeuk Kim , Sasha Levin , linux-f2fs-devel@lists.sourceforge.net Subject: [PATCH AUTOSEL 5.15 17/21] f2fs: fix to detect corrupted meta ino Date: Mon, 17 Oct 2022 20:09:36 -0400 Message-Id: <20221018000940.2731329-17-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221018000940.2731329-1-sashal@kernel.org> References: <20221018000940.2731329-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Sasha Levin --- fs/f2fs/inode.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index bd8960f4966b..cc91bcebd2ca 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -480,6 +480,12 @@ static int do_read_inode(struct inode *inode) 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); @@ -491,16 +497,21 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 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) -- 2.35.1