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From: Andreas Gruenbacher <agruenba@redhat.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
	"Theodore Ts'o" <tytso@mit.edu>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	"J. Bruce Fields" <bfields@fieldses.org>,
	Jeff Layton <jlayton@poochiereds.net>,
	Trond Myklebust <trond.myklebust@primarydata.com>,
	Anna Schumaker <anna.schumaker@netapp.com>,
	Dave Chinner <david@fromorbit.com>,
	linux-ext4@vger.kernel.org, xfs@oss.sgi.com,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org,
	linux-api@vger.kernel.org
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Subject: [PATCH v12 45/49] nfs: Fix GETATTR bitmap verification
Date: Fri, 23 Oct 2015 20:41:58 +0200	[thread overview]
Message-ID: <1445625722-13791-46-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1445625722-13791-1-git-send-email-agruenba@redhat.com>

When decoding GETATTR replies, the client checks the attribute bitmap
for which attributes the server has sent.  It misses bits at the word
boundaries, though; fix that.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/nfs/nfs4xdr.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 788adf3..6f6d921 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4375,6 +4375,11 @@ static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
 		goto xdr_error;
 	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
 		goto xdr_error;
+
+	status = -EIO;
+	if (unlikely(bitmap[0]))
+		goto xdr_error;
+
 	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
 		goto xdr_error;
 	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
@@ -4574,6 +4579,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
 		goto xdr_error;
 	fattr->valid |= status;
 
+	status = -EIO;
+	if (unlikely(bitmap[0]))
+		goto xdr_error;
+
 	status = decode_attr_mode(xdr, bitmap, &fmode);
 	if (status < 0)
 		goto xdr_error;
@@ -4627,6 +4636,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
 		goto xdr_error;
 	fattr->valid |= status;
 
+	status = -EIO;
+	if (unlikely(bitmap[1]))
+		goto xdr_error;
+
 	status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
 	if (status < 0)
 		goto xdr_error;
@@ -4789,12 +4802,22 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
 	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
 		goto xdr_error;
 	fsinfo->wtpref = fsinfo->wtmax;
+
+	status = -EIO;
+	if (unlikely(bitmap[0]))
+		goto xdr_error;
+
 	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
 	if (status != 0)
 		goto xdr_error;
 	status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
 	if (status != 0)
 		goto xdr_error;
+
+	status = -EIO;
+	if (unlikely(bitmap[1]))
+		goto xdr_error;
+
 	status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
 	if (status)
 		goto xdr_error;
-- 
2.5.0


  parent reply	other threads:[~2015-10-23 18:47 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-23 18:41 [PATCH v12 00/49] Richacls Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 01/49] vfs: Add IS_ACL() and IS_RICHACL() tests Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 02/49] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 03/49] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 04/49] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 05/49] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 06/49] richacl: In-memory representation and helper functions Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 07/49] richacl: Permission mapping functions Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 08/49] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 09/49] richacl: Permission check algorithm Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 10/49] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 11/49] vfs: Add get_richacl and set_richacl inode operations Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 12/49] vfs: Cache richacl in struct inode Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 13/49] richacl: Update the file masks in chmod() Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 14/49] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 15/49] richacl: Create-time inheritance Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 16/49] richacl: Automatic Inheritance Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 17/49] richacl: xattr mapping functions Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 18/49] richacl: Add richacl xattr handler Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 19/49] vfs: Add richacl permission checking Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 20/49] ext4: Add richacl support Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 21/49] ext4: Add richacl feature flag Andreas Gruenbacher
2015-10-23 19:34   ` Austin S Hemmelgarn
2015-10-23 18:41 ` [PATCH v12 22/49] xfs: Fix error path in xfs_get_acl Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 23/49] xfs: Make xfs_set_mode non-static Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 24/49] xfs: Change how listxattr generates synthetic attributes Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 25/49] xfs: Add richacl support Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 26/49] richacl: acl editing helper functions Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 27/49] richacl: Move everyone@ aces down the acl Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 28/49] richacl: Propagate everyone@ permissions to other aces Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 29/49] richacl: Set the owner permissions to the owner mask Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 30/49] richacl: Set the other permissions to the other mask Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 31/49] richacl: Isolate the owner and group classes Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 32/49] richacl: Apply the file masks to a richacl Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 33/49] richacl: Create richacl from mode values Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 34/49] nfsd: Keep list of acls to dispose of in compoundargs Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 35/49] nfsd: Use richacls as internal acl representation Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 36/49] nfsd: Add richacl support Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 37/49] nfsd: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 38/49] nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 39/49] richacl: Add support for unmapped identifiers Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 40/49] nfsd: Add support for unmapped richace identifiers Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 41/49] ext4: Don't allow unmapped identifiers in richacls Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 42/49] xfs: " Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 43/49] sunrpc: Allow to demand-allocate pages to encode into Andreas Gruenbacher
2015-10-23 18:41 ` [PATCH v12 44/49] sunrpc: Add xdr_init_encode_pages Andreas Gruenbacher
2015-10-23 18:41 ` Andreas Gruenbacher [this message]
2015-10-23 18:41 ` [PATCH v12 46/49] nfs: Remove unused xdr page offsets in getacl/setacl arguments Andreas Gruenbacher
2015-10-23 18:42 ` [PATCH v12 47/49] nfs: Distinguish missing users and groups from nobody Andreas Gruenbacher
2015-10-23 18:42 ` [PATCH v12 48/49] nfs: Add richacl support Andreas Gruenbacher
2015-10-23 18:42 ` [PATCH v12 49/49] nfs: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-23 20:03 ` [PATCH v12 00/49] Richacls Frank Filz

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