Now that the new vfs-level interfaces are fully supported and all code has been converted to use them, stop permitting use of the top-level vfs xattr interfaces for capabilities xattrs. Unlike with ACLs we still need to be able to work with fscaps xattrs using lower-level interfaces in a handful of places, so only use of the top-level xattr interfaces is restricted.
Signed-off-by: Seth Forshee (DigitalOcean) <[email protected]> --- fs/xattr.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/xattr.c b/fs/xattr.c index 30eff6bc4f6d..2b8214c9534f 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -534,6 +534,9 @@ vfs_setxattr(struct mnt_idmap *idmap, struct dentry *dentry, const void *orig_value = value; int error; + if (WARN_ON_ONCE(is_fscaps_xattr(name))) + return -EOPNOTSUPP; + retry_deleg: inode_lock(inode); error = __vfs_setxattr_locked(idmap, dentry, name, value, size, @@ -649,6 +652,9 @@ vfs_getxattr(struct mnt_idmap *idmap, struct dentry *dentry, struct inode *inode = dentry->d_inode; int error; + if (WARN_ON_ONCE(is_fscaps_xattr(name))) + return -EOPNOTSUPP; + error = xattr_permission(idmap, inode, name, MAY_READ); if (error) return error; @@ -788,6 +794,9 @@ vfs_removexattr(struct mnt_idmap *idmap, struct dentry *dentry, struct inode *delegated_inode = NULL; int error; + if (WARN_ON_ONCE(is_fscaps_xattr(name))) + return -EOPNOTSUPP; + retry_deleg: inode_lock(inode); error = __vfs_removexattr_locked(idmap, dentry, -- 2.43.0
