linux-kernel - [155/197] ecryptfs: fix error code for missing xattrs in lower fs

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Message-Id: <20100422190921.235116706@kvm.kroah.org>
Date:	Thu, 22 Apr 2010 12:10:06 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Christian Pulvermacher <pulvermacher@....de>,
	Tyler Hicks <tyhicks@...ux.vnet.ibm.com>
Subject: [155/197] ecryptfs: fix error code for missing xattrs in lower fs

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Christian Pulvermacher <pulvermacher@....de>

commit cfce08c6bdfb20ade979284e55001ca1f100ed51 upstream.

If the lower file system driver has extended attributes disabled,
ecryptfs' own access functions return -ENOSYS instead of -EOPNOTSUPP.
This breaks execution of programs in the ecryptfs mount, since the
kernel expects the latter error when checking for security
capabilities in xattrs.

Signed-off-by: Christian Pulvermacher <pulvermacher@....de>
Signed-off-by: Tyler Hicks <tyhicks@...ux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/ecryptfs/inode.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -998,7 +998,7 @@ ecryptfs_setxattr(struct dentry *dentry,
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	if (!lower_dentry->d_inode->i_op->setxattr) {
-		rc = -ENOSYS;
+		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	mutex_lock(&lower_dentry->d_inode->i_mutex);
@@ -1016,7 +1016,7 @@ ecryptfs_getxattr_lower(struct dentry *l
 	int rc = 0;
 
 	if (!lower_dentry->d_inode->i_op->getxattr) {
-		rc = -ENOSYS;
+		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	mutex_lock(&lower_dentry->d_inode->i_mutex);
@@ -1043,7 +1043,7 @@ ecryptfs_listxattr(struct dentry *dentry
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	if (!lower_dentry->d_inode->i_op->listxattr) {
-		rc = -ENOSYS;
+		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	mutex_lock(&lower_dentry->d_inode->i_mutex);
@@ -1060,7 +1060,7 @@ static int ecryptfs_removexattr(struct d
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	if (!lower_dentry->d_inode->i_op->removexattr) {
-		rc = -ENOSYS;
+		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	mutex_lock(&lower_dentry->d_inode->i_mutex);


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