ecryptfs: fix error code for missing xattrs in lower fs

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@gmx.de>
Cc: stable@kernel.org
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 605f514..efd4f47 100644 (file)
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1043,7 +1043,7 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 
        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);
@@ -1061,7 +1061,7 @@ ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name,
        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);
@@ -1088,7 +1088,7 @@ ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)
 
        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);
@@ -1105,7 +1105,7 @@ static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
 
        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);