[v2,16/18] vfs: Check for the IOP_XATTR flag in listxattr
diff mbox

Message ID 1463742875-9836-17-git-send-email-agruenba@redhat.com
State New
Headers show

Commit Message

Andreas Gruenbacher May 20, 2016, 11:14 a.m. UTC
When an inode doesn't support xattrs, turn listxattr off as well.

(When xattrs are "turned off", the VFS still passes security xattr
operations through to security modules, which can still expose inode
security labels that way.)

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/xattr.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Patch
diff mbox

diff --git a/fs/xattr.c b/fs/xattr.c
index 5579ace..e9fc705 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -320,18 +320,19 @@  nolsm:
 EXPORT_SYMBOL_GPL(vfs_getxattr);
 
 ssize_t
-vfs_listxattr(struct dentry *d, char *list, size_t size)
+vfs_listxattr(struct dentry *dentry, char *list, size_t size)
 {
+	struct inode *inode = d_inode(dentry);
 	ssize_t error;
 
-	error = security_inode_listxattr(d);
+	error = security_inode_listxattr(dentry);
 	if (error)
 		return error;
-	error = -EOPNOTSUPP;
-	if (d->d_inode->i_op->listxattr) {
-		error = d->d_inode->i_op->listxattr(d, list, size);
+	if (inode->i_op->listxattr && (inode->i_opflags & IOP_XATTR)) {
+		error = -EOPNOTSUPP;
+		error = inode->i_op->listxattr(dentry, list, size);
 	} else {
-		error = security_inode_listsecurity(d->d_inode, list, size);
+		error = security_inode_listsecurity(inode, list, size);
 		if (size && error > size)
 			error = -ERANGE;
 	}