From patchwork Wed Mar 27 02:00:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13605430 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A12541CD2B for ; Wed, 27 Mar 2024 02:00:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711504824; cv=none; b=PV4EbrT50N61QVg9ZvJBUMYfm+8EIEI1KLiaMtpXOzchmt5GjFtfwuT4AP9Vz/ng6T5rXmHbWmThCAsqEEHOc8RbWs8X6oG1DJiNInJI1EV6gzvblTk7yJEvRoYLdz+3ntEZTuL0OiAtcXcDq63YCj2l2hvV1b0F5TXNOA/xphs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711504824; c=relaxed/simple; bh=hIGNm3pCjiiM81guLEZLd4qvlWFf5zuMcBZxs5ucJwk=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=q4It6oJy0jrSYmKUr6WrQTE/vjnJMw2QVjpPjLbM4nGLqS/SJatOqDnb50ypbAoYPi9RcTujYkO/QZtRqVtP/Ty6/RvKWUpluKA+ja/jHRi+XVDJUoenjhOVBFtgjYvnzTirDxNaavdjimTFfxKY0aUz2FXIY0lgBDUBygn5UOg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EwIQqxe+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EwIQqxe+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80B01C433C7; Wed, 27 Mar 2024 02:00:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711504824; bh=hIGNm3pCjiiM81guLEZLd4qvlWFf5zuMcBZxs5ucJwk=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=EwIQqxe+gV1hPmdcDpG/4GXLmLD9oXh3GoHb3NeHYCMIoeaeQWG9RBX2aAKdEa945 jjMtMdTrlBWeyoqd6jy7HIxnboKRZzapUzZiz/xrcaqskj9ZFO8jqlp70NLFsdgP7g +SQBnha9sKhQIN9FhizLEnvRdPntNlAwrx84GZFtwXBOc/gRm7ItpB9SfY0d8UgoHE 4AogBbOxSONBhPg+bOGXJ/dku/odZzyMkKRy/fUNqzB+PEFasJ67U2Bi6J9y+02t+P AIydBD2pyTBIOGK+gKJ4IoIf9OaDhkmjNGgBX5NkyL+L3yvJMnBDvjJ5uDXF7ZkBKx 6u3UUnEQpKk6w== Date: Tue, 26 Mar 2024 19:00:24 -0700 Subject: [PATCH 07/10] xfs: validate directory leaf buffer owners From: "Darrick J. Wong" To: djwong@kernel.org Cc: Christoph Hellwig , hch@lst.de, linux-xfs@vger.kernel.org Message-ID: <171150382241.3217370.14754392928350277042.stgit@frogsfrogsfrogs> In-Reply-To: <171150382098.3217370.5208665628669220587.stgit@frogsfrogsfrogs> References: <171150382098.3217370.5208665628669220587.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong Check the owner field of directory leaf blocks. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_da_btree.c | 16 ++++++++++ fs/xfs/libxfs/xfs_dir2.h | 2 + fs/xfs/libxfs/xfs_dir2_leaf.c | 64 +++++++++++++++++++++++++++++++++++++---- fs/xfs/libxfs/xfs_dir2_node.c | 3 +- fs/xfs/libxfs/xfs_dir2_priv.h | 4 +-- fs/xfs/scrub/dir.c | 2 + 6 files changed, 81 insertions(+), 10 deletions(-) diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index 3505629043f0b..a5d0cb728267e 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -287,8 +287,12 @@ xfs_da3_header_check( return xfs_attr3_leaf_header_check(bp, owner); case cpu_to_be16(XFS_DA3_NODE_MAGIC): return xfs_da3_node_header_check(bp, owner); + case cpu_to_be16(XFS_DIR3_LEAF1_MAGIC): + case cpu_to_be16(XFS_DIR3_LEAFN_MAGIC): + return xfs_dir3_leaf_header_check(bp, owner); } + ASSERT(0); return NULL; } @@ -1699,6 +1703,12 @@ xfs_da3_node_lookup_int( if (magic == XFS_DIR2_LEAFN_MAGIC || magic == XFS_DIR3_LEAFN_MAGIC) { + fa = xfs_dir3_leaf_header_check(blk->bp, args->owner); + if (fa) { + __xfs_buf_mark_corrupt(blk->bp, fa); + xfs_da_mark_sick(args); + return -EFSCORRUPTED; + } blk->magic = XFS_DIR2_LEAFN_MAGIC; blk->hashval = xfs_dir2_leaf_lasthash(args->dp, blk->bp, NULL); @@ -2207,6 +2217,12 @@ xfs_da3_path_shift( break; case XFS_DIR2_LEAFN_MAGIC: case XFS_DIR3_LEAFN_MAGIC: + fa = xfs_dir3_leaf_header_check(blk->bp, args->owner); + if (fa) { + __xfs_buf_mark_corrupt(blk->bp, fa); + xfs_da_mark_sick(args); + return -EFSCORRUPTED; + } blk->magic = XFS_DIR2_LEAFN_MAGIC; ASSERT(level == path->active-1); blk->index = 0; diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h index 8497d041f3163..2f728c26a4162 100644 --- a/fs/xfs/libxfs/xfs_dir2.h +++ b/fs/xfs/libxfs/xfs_dir2.h @@ -101,6 +101,8 @@ extern struct xfs_dir2_data_free *xfs_dir2_data_freefind( extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino); +xfs_failaddr_t xfs_dir3_leaf_header_check(struct xfs_buf *bp, xfs_ino_t owner); + extern const struct xfs_buf_ops xfs_dir3_block_buf_ops; extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops; extern const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops; diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c index 20ce057d12e82..16a581e225a37 100644 --- a/fs/xfs/libxfs/xfs_dir2_leaf.c +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c @@ -208,6 +208,28 @@ xfs_dir3_leaf_verify( return xfs_dir3_leaf_check_int(mp, &leafhdr, bp->b_addr, true); } +xfs_failaddr_t +xfs_dir3_leaf_header_check( + struct xfs_buf *bp, + xfs_ino_t owner) +{ + struct xfs_mount *mp = bp->b_mount; + + if (xfs_has_crc(mp)) { + struct xfs_dir3_leaf *hdr3 = bp->b_addr; + + ASSERT(hdr3->hdr.info.hdr.magic == + cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) || + hdr3->hdr.info.hdr.magic == + cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)); + + if (be64_to_cpu(hdr3->hdr.info.owner) != owner) + return __this_address; + } + + return NULL; +} + static void xfs_dir3_leaf_read_verify( struct xfs_buf *bp) @@ -271,32 +293,60 @@ int xfs_dir3_leaf_read( struct xfs_trans *tp, struct xfs_inode *dp, + xfs_ino_t owner, xfs_dablk_t fbno, struct xfs_buf **bpp) { + xfs_failaddr_t fa; int err; err = xfs_da_read_buf(tp, dp, fbno, 0, bpp, XFS_DATA_FORK, &xfs_dir3_leaf1_buf_ops); - if (!err && tp && *bpp) + if (err || !(*bpp)) + return err; + + fa = xfs_dir3_leaf_header_check(*bpp, owner); + if (fa) { + __xfs_buf_mark_corrupt(*bpp, fa); + xfs_trans_brelse(tp, *bpp); + *bpp = NULL; + xfs_dirattr_mark_sick(dp, XFS_DATA_FORK); + return -EFSCORRUPTED; + } + + if (tp) xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAF1_BUF); - return err; + return 0; } int xfs_dir3_leafn_read( struct xfs_trans *tp, struct xfs_inode *dp, + xfs_ino_t owner, xfs_dablk_t fbno, struct xfs_buf **bpp) { + xfs_failaddr_t fa; int err; err = xfs_da_read_buf(tp, dp, fbno, 0, bpp, XFS_DATA_FORK, &xfs_dir3_leafn_buf_ops); - if (!err && tp && *bpp) + if (err || !(*bpp)) + return err; + + fa = xfs_dir3_leaf_header_check(*bpp, owner); + if (fa) { + __xfs_buf_mark_corrupt(*bpp, fa); + xfs_trans_brelse(tp, *bpp); + *bpp = NULL; + xfs_dirattr_mark_sick(dp, XFS_DATA_FORK); + return -EFSCORRUPTED; + } + + if (tp) xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAFN_BUF); - return err; + return 0; } /* @@ -646,7 +696,8 @@ xfs_dir2_leaf_addname( trace_xfs_dir2_leaf_addname(args); - error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, &lbp); + error = xfs_dir3_leaf_read(tp, dp, args->owner, args->geo->leafblk, + &lbp); if (error) return error; @@ -1237,7 +1288,8 @@ xfs_dir2_leaf_lookup_int( tp = args->trans; mp = dp->i_mount; - error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, &lbp); + error = xfs_dir3_leaf_read(tp, dp, args->owner, args->geo->leafblk, + &lbp); if (error) return error; diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c index 1ad7405f9c389..e21965788188b 100644 --- a/fs/xfs/libxfs/xfs_dir2_node.c +++ b/fs/xfs/libxfs/xfs_dir2_node.c @@ -1562,7 +1562,8 @@ xfs_dir2_leafn_toosmall( /* * Read the sibling leaf block. */ - error = xfs_dir3_leafn_read(state->args->trans, dp, blkno, &bp); + error = xfs_dir3_leafn_read(state->args->trans, dp, + state->args->owner, blkno, &bp); if (error) return error; diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h index 1db2e60ba827f..2f0e3ad47b371 100644 --- a/fs/xfs/libxfs/xfs_dir2_priv.h +++ b/fs/xfs/libxfs/xfs_dir2_priv.h @@ -95,9 +95,9 @@ void xfs_dir2_leaf_hdr_from_disk(struct xfs_mount *mp, void xfs_dir2_leaf_hdr_to_disk(struct xfs_mount *mp, struct xfs_dir2_leaf *to, struct xfs_dir3_icleaf_hdr *from); int xfs_dir3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, - xfs_dablk_t fbno, struct xfs_buf **bpp); + xfs_ino_t owner, xfs_dablk_t fbno, struct xfs_buf **bpp); int xfs_dir3_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp, - xfs_dablk_t fbno, struct xfs_buf **bpp); + xfs_ino_t owner, xfs_dablk_t fbno, struct xfs_buf **bpp); extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args, struct xfs_buf *dbp); extern int xfs_dir2_leaf_addname(struct xfs_da_args *args); diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c index 042e28547e044..d94e265a8e1f2 100644 --- a/fs/xfs/scrub/dir.c +++ b/fs/xfs/scrub/dir.c @@ -470,7 +470,7 @@ xchk_directory_leaf1_bestfree( int error; /* Read the free space block. */ - error = xfs_dir3_leaf_read(sc->tp, sc->ip, lblk, &bp); + error = xfs_dir3_leaf_read(sc->tp, sc->ip, sc->ip->i_ino, lblk, &bp); if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, lblk, &error)) return error; xchk_buffer_recheck(sc, bp);