From bf3ee71363c0b44acb62f375aea470262ac4210a Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Thu, 29 Sep 2016 17:48:43 +0200 Subject: vfs: Check for the IOP_XATTR flag in listxattr 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 Signed-off-by: Al Viro --- fs/xattr.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'fs/xattr.c') diff --git a/fs/xattr.c b/fs/xattr.c index 54a411519127..e1ccf2be88ac 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -326,18 +326,19 @@ 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; } -- cgit v1.2.1