diff --git a/fs/attr.c b/fs/attr.c
index 765fc75..26c71ba 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -108,6 +108,11 @@
 	struct timespec now;
 	unsigned int ia_valid = attr->ia_valid;
 
+	if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
+		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+			return -EPERM;
+	}
+
 	now = current_fs_time(inode->i_sb);
 
 	attr->ia_ctime = now;