+int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
+ struct lttng_kernel_filter_bytecode __user *bytecode)
+{
+ struct lttng_filter_bytecode_node *bytecode_node;
+ uint32_t bytecode_len;
+ int ret;
+
+ ret = get_user(bytecode_len, &bytecode->len);
+ if (ret)
+ return ret;
+ bytecode_node = kzalloc(sizeof(*bytecode_node) + bytecode_len,
+ GFP_KERNEL);
+ if (!bytecode_node)
+ return -ENOMEM;
+ ret = copy_from_user(&bytecode_node->bc, bytecode,
+ sizeof(*bytecode) + bytecode_len);
+ if (ret)
+ goto error_free;
+ bytecode_node->enabler = enabler;
+ /* Enforce length based on allocated size */
+ bytecode_node->bc.len = bytecode_len;
+ list_add_tail(&bytecode_node->node, &enabler->filter_bytecode_head);
+ lttng_session_lazy_sync_enablers(enabler->chan->session);
+ return 0;
+
+error_free:
+ kfree(bytecode_node);
+ return ret;
+}
+